Browse Finding Aids by Date
1901-1925
A
- A. Hildebrandt papers, 1826-1943.
- A.A. Brill papers, 1888-1994.
- Aaron Copland collection, 1841-1991.
- Aaron Schoen World War I map collection.
- A.B. (Alfred Bult) Mullett archive.
- A.B. MacDonald papers, 1878-1976.
- A.B. Mullett & Co. architectural drawing archive.
- A.B. Mullett & Co. archive.
- A.B. Mullett & Co. Mullett & Co. architectural drawing archive (Library of Congress).
- Abbe, Cleveland, 1838-1916. Cleveland Abbe papers, 1850-1954.
- Abbe, Cleveland, Jr., 1872-1934. Cleveland Abbe Jr. papers.
- Abbott Lawrence Rotch papers 1896-1912.
- Abel Doysié papers, 1910-1967.
- Abraham Flexner papers, 1865-1989.
- Abraham, Karl, 1877-1925. Karl Abraham papers, 1908-1925.
- Abraham Lincoln papers, 1774-1948.
- Abram P.T. Elder papers, 1890-1916.
- Acheson, Edward Goodrich, 1856-1931. Edward Goodrich Acheson papers, 1872-1968.
- Adams, Leason Heberling, 1887-1969. Leason Heberling Adams papers, 1919-1968.
- Adee, Alvey A. (Alvey Augustus), 1842-1924. Alvey A. Adee papers.
- Adee, Augustus Alvey, 1802-1844. Augustus Alvey Adee papers.
- Adee, David Graham, 1837-1901. David Graham Adee papers.
- Adee family. Adee family papers, 1824-1966.
- Adee family papers, 1824-1966.
- Adelaide Johnson papers, 1873-1947.
- Adelaide Rosalia Hasse papers, 1862-1951.
- Adolph Bolm collection, 1895-1982.
- Adolph Caspar Miller papers, 1913-1947.
- Adolph Law Voge papers, 1915-1939.
- A.E. Housman papers, 1906-1940.
- Aero Club of America. Aero Club of America scrapbooks, 1891-1912.
- Aero Club of America records.
- Aero Club of America scrapbooks, 1891-1912.
- L'Aerophile collection, 1876-1949.
- Ager, Milton, 1893-1979. Milton Ager music manuscripts, circa 1918-1979.
- Agnes Elizabeth Ernst Meyer papers, 1853-2010.
- A.K. Fisher papers, 1827-1957.
- Albert Einstein papers, 1916-1953.
- Albert Gleaves papers, 1803-1946.
- Albert J. Beveridge papers, 1788-1943.
- Albert Payson Terhune papers, 1890-1957.
- Albert Sidney Burleson papers, 1845-1943.
- Alberto Nepomuceno collection, 1887-1988.
- Alcides Arguedas diaries, 1900-1943.
- Alcides Arguedas papers.
- Aldrich, Abby Pearce Chapman, 1845-1917. Abby Pearce Chapman Aldrich diaries. 1904-1912.
- Aldrich family. John Aldrich Stephenson collection of the Hand, Fiske, and Aldrich families papers. 1745-1966.
- Aldrich family papers.
- Aldrich, Morton Arnold, 1874-1956. Morton Arnold Aldrich papers.
- Aldrich, Nelson W. (Nelson Wilmarth), 1841-1915. Nelson W. Aldrich papers, 1777-1930.
- Aldrich, Thomas Bailey, 1836-1907. Thomas Bailey Aldrich papers, 1873-1901.
- Aldrich, Zoë Worthington Fiske, 1864-1942. Zoë Worthington Fiske Aldrich papers.
- Alessandro Liberati collection.
- Alexander Black MacDonald papers.
- Alexander Freud and Sophie Schreiber Freud papers, 1872-1965.
- Alexander Graham Bell family papers, 1834-1974.
- Alexander Jeffrey McKelway papers, 1814-1942.
- Alexandra Danilova collection, 1920-2000.
- Alexis Vasilevich Babine papers, 1895-1953.
- Alfred Easton Poor papers, 1866-1985.
- Alfred Edward Housman papers.
- Alice Eversman and Elena De Sayn collection.
- Alice Eversman and Elena de Sayn papers, 1862-1970s.
- Alice Koenigsberger collection.
- Alice Kortschak Koenigsberger and Hugo Kortschak papers, 1913-1941.
- Alice Rohe papers, 1914-1919.
- Alice Roosevelt Longworth papers, 1888-1942.
- Allen, Charles Julius, 1840-1915. Charles Julius Allen papers.
- Allen family papers.
- Allen, Florence Ellinwood, 1884-1966. Florence Ellinwood Allen papers, 1907-1965.
- Allen, Grace Elizabeth, 1886-1976. Grace Elizabeth Allen papers.
- Allen, Henry Justin, 1868-1950. Henry Justin Allen papers, 1896-1942.
- Allen, Henry T. (Henry Tureman), 1859-1930. Henry T. Allen papers, 1806-1933.
- Allesandro and Speranza Liberati papers, 1880-1947.
- Allison, Mary Ireland, -1870. Mary Ireland Allison diary. 1868-1869.
- Allison, William Henry, 1870-1941. William Henry Allison diaries, 1868-1940.
- Alma Gluck scrapbooks and other materials, 1902-1940.
- Alton B. Parker papers, 1878-1937.
- Ambler, Barbara Hayes, 1926-2006. Barbara Hayes Ambler papers.
- Ameen Fares Rihani papers, 1897-1940.
- American / Century Play Company scripts and business papers, 1894-2006.
- American Colonization Society. American Colonization Society records, 1792-1964.
- American Colonization Society records, 1792-1964.
- American Colony in Jerusalem collection, circa 1786-2007.
- American Colony (Jerusalem). American Colony in Jerusalem collection, circa 1786-2007.
- American Council of Learned Societies. American Council of Learned Societies records, 1910-2019.
- American Council of Learned Societies records, 1910-2019.
- American Federation of Labor. American Federation of Labor records, 1883-1925.
- American Federation of Labor records, 1883-1925.
- American Gold Star Mothers, Inc. American Gold Star Mothers, Inc., records, 1917-1941.
- American Gold Star Mothers, Inc., records, 1917-1941.
- American Historical Association. American Historical Association records, 1884-1986.
- American Historical Association records, 1884-1986.
- American Institute of Aeronautics and Astronautics. Institute of the Aerospace Sciences archives, 1783-1962.
- American Play Company. American / Century Play Company scripts and business papers, 1894-2006.
- American Society for Colonizing the Free People of Colour of the United States. American Society for Colonizing the Free People of Colour of the United States records.
- Amory Austin collection relating to heraldry, 1865-1917.
- Amos Pinchot papers, 1856-1945.
- Andersen, Hendrik Christian, 1872-1940. Hendrik Christian Andersen papers, 1844-1940.
- Andersen, Olivia Cushing, 1871- Olivia Cushing Andersen papers. 1882-1929.
- Anderson, Chandler P. (Chandler Parsons), 1866-1936. Chandler P. Anderson papers, 1894-1953.
- Anderson, Frank Maloy, 1871-1961. Frank Maloy Anderson papers, 1895-1961.
- Anderson, Maxwell, 1888-1959. Maxwell Anderson papers, 1920-1989.
- Andre Kostelanetz collection, 1922-1984.
- Andrew Carnegie papers, 1803-1935.
- Andrew Gbur collection, 1916-1992.
- Andrews, Edgar D., 1890-1974. Edgar D. Andrews collection 1917-1974.
- Angelo Patri papers, 1904-1962.
- Anita Newcomb McGee papers, 1688-1932.
- Ann Tanneyhill papers, 1879-2012.
- Anna E. Dickinson papers, 1859-1951.
- Anna Jean Snowden papers, 1910-1949.
- Anne Hull collection, 1905-1980.
- Anne Hull papers, 1894-1981.
- Anne Locke Bixby Chamberlin family papers, 1793-1924.
- Anne Locke Bixby Chamberlin papers.
- Anne Montgomerie Traubel papers.
- Anson Burlingame and Edward L. Burlingame family papers, 1810-1922.
- Antheil, George, 1900-1959. George and Böske Antheil papers, circa 1875-1984.
- Antheil, George, 1900-1959. George Antheil correspondence to Stanley Hart, 1919-1931.
- Antheil, George, 1900-1959. George Antheil correspondence with Mary Louise Curtis Bok, 1921-1940.
- Anthony League of the District of Columbia. Anthony League of the District of Columbia records.
- Anthony, Mary S. Mary S. Anthony papers.
- Anthony, Susan B. (Susan Brownell), 1820-1906. Susan B. Anthony papers, 1846-1934.
- Anti-Imperialist League (Washington, D.C.). Anti-Imperialist League (Washington, D.C.) records. 1899-1908.
- Anton Gloetzner music manuscripts, 1870-1920.
- Antonín Novotný papers, 1848-1966.
- A.P. Schmidt Company. A.P. Schmidt Company archives, 1869-1958.
- A.P. Schmidt Company archives, 1869-1958.
- Appleton, Nathan, 1843-1906. Nathan Appleton papers, 1850-1904.
- Appling, Austin M. (Austin Maurice), 1794- Austin M. Appling account ledgers. 1832-1862.
- Archer, Gleason L., 1880-1966. Gleason L. Archer papers.
- Argenteau family. Mercy-Argenteau family papers, 1410-1921.
- Argenteau family papers.
- Arguedas, Alcides, 1879-1946. Alcides Arguedas diaries, 1900-1943.
- Armand Hammer papers, circa 1508-1989.
- Armes, Ethel, 1876-1945. Ethel Armes collection of Lee family papers, 1671-1936.
- Armstrong, Robert Burns, 1903-1955. Robert Burns Armstrong papers.
- Arne Oldberg collection, circa 1887-1962.
- Arnold Gesell papers, 1870-1971.
- Arnold Schoenberg correspondence and other papers, 1894-1959.
- Arthur B. Heaton architectural drawing archive.
- Arthur B. Heaton archive.
- Arthur B. Spingarn papers, 1850-1968.
- Arthur, Chester Alan, II, 1864-1937. Chester Alan Arthur II papers. 1874-1937.
- Arthur, Chester Alan, III, 1901-1972. Chester Alan Arthur III papers. 1853-1972.
- Arthur D. Little, Inc. Arthur D. Little, Inc., records.
- Arthur D. Little papers, 1884-1973.
- Arthur family. Arthur family papers, 1817-1972.
- Arthur family papers, 1817-1972.
- Arthur Foote music manuscripts 1888-1919.
- Arthur Gleason papers, 1863-1931.
- Arthur J. Morris papers, 1888-1976.
- Arthur Sweetser papers, 1913-1961.
- Arthur Woods papers, 1884-1938.
- Artur Schnabel collection, 1899-1950.
- Artur Schnabel - Mary Virginia Foreman LeGarrec collection, 1893-1996.
- Asaph Hall papers, 1837-1998.
- Associated Press news dispatches, 1915-1930.
- Associated Press. Washington Bureau. Associated Press news dispatches, 1915-1930.
- Association Against the Prohibition Amendment. Association Against the Prohibition Amendment records, 1917-1933.
- Association Against the Prohibition Amendment records, 1917-1933.
- Association for National Service. Association for National Service records.
- A.T. Mahan papers, 1779-1970.
- Augustus S. Nicholson papers, 1861-1934.
- Austin, Amory. Amory Austin collection relating to heraldry, 1865-1917.
- Austrian, Geoffrey. Geoffrey Austrian papers.
- A.W. Greely papers, 1753-1997.
- Ayestarán, Lauro. Lauro Ayestarán collection, 1830-1966.
- Ayres, Leonard Porter, 1879-1946. Leonard Porter Ayres papers, 1902-1946.
B
- Babine, Alexis Vasilevich, 1866-1930. Alexis Vasilevich Babine papers, 1895-1953.
- Bailey, Leo Joseph, 1894-1988 Leo Joseph Bailey collection 1917-2008.
- Bain, Frank Frank Bain papers.
- Bain, Mildred Mildred Bain papers.
- Bainbridge Colby papers, 1863-1950.
- Baker, Annabelle Annabelle Baker papers.
- Baker, Newton Diehl, 1871-1937. Newton Diehl Baker papers, 1896-1962.
- Baker, Ray Stannard, 1870-1946. Ray Stannard Baker papers, 1836-1947.
- Baldorioty de Castro, Román, 1822-1889. Román Baldorioty de Castro papers.
- Baldwin, Evelyn Briggs, 1862-1933. Evelyn Briggs Baldwin papers, 1649-1933.
- Baldwin, Hanson Weightman, 1903-1991. Hanson Weightman Baldwin papers, 1920-1978.
- Ballets russes. Serge Grigoriev / Ballets Russes archive. 1909-2009.
- Bangs, George H. George H. Bangs papers.
- Barbee, David Rankin, 1874-1958. James Dodson and David Rankin Barbee papers. 1784-1953.
- Barbee, James Dodson, 1832-1904. James Dodson Barbee and David Rankin Barbee papers, 1784-1953.
- Barnard, Leon F., 1877-1917. Leon F. Barnard papers, 1901-circa 1993.
- Barr, Cyrilla. Cyrilla Barr research materials on Elizabeth Sprague Coolidge, 1864-2000.
- Barrett, John, 1866-1938. John Barrett papers, 1861-1943.
- Barrus, Clara, 1864-1931. Clara Barrus and John Burroughs papers. 1877-1981.
- Bartlett, Ethel, 1896-1978. Ethel Bartlett and Rae Robertson music and other papers, 1914-1970.
- Bartlett, Paul Wayland, 1865-1925. Paul Wayland Bartlett papers, 1875-1959.
- Bartlett, Suzanne Earle Ogden-Jones Emmons, 1861-1954. Suzanne Earle Ogden-Jones Emmons Bartlett papers. 1897-1913.
- Bartlett, Truman Howe, 1835-1923. Truman Howe Bartlett papers. 1881-1922.
- Bartók, Béla, 1881-1945. Etelka Freund collection on Béla Bartók, 1903-1971.
- Bartók-Freund collection, 1904-1970.
- Barton, Clara, 1821-1912. Clara Barton papers, 1805-1963.
- Bassett, John Spencer, 1867-1928. John Spencer Bassett papers, 1770-1978.
- Bassow, Whitman. Whitman Bassow papers, 1920-1990.
- Batchelder, John Davis, 1872-1958. John Davis Batchelder collection of manuscripts, 1537-1944.
- Batchelder, John Davis, 1872-1958. John Davis Batchelder ephemera and special collections, 2200 BCE-1948.
- Batchelder, John Davis, 1872-1958. John Davis Batchelder papers. 1910-1944.
- Bates, David Homer, 1843-1926. David Homer Bates papers, 1837-1926.
- Bateson, Gregory, 1904-1980. Gregory Bateson papers.
- Bauer, Harold, 1873-1951. Harold Bauer collection, 1886-1951.
- Beach, Joseph Warren, 1880-1957. Concept of nature in nineteenth-century English poetry. 1936.
- Beach, Joseph Warren, 1880-1957. Joseph Warren Beach papers, 1891-1955.
- Beach, Joseph Warren, 1880-1957. Making of the Auden canon. 1957.
- Beale, Edward Fitzgerald, 1822-1893. Edward Fitzgerald Beale papers.
- Beale family. Beale family papers from the Decatur House, 1794-1957.
- Beale family papers from the Decatur House, 1794-1957.
- Beale, Marie Oge, 1880-1956. Marie Oge Beale diaries.
- Beale, Truxton, 1856-1936. Truxton Beale papers.
- Beard, Daniel Carter, 1850-1941. Daniel Carter Beard papers, 1798-1941.
- Beard, Daniel Carter, 1850-1941. Visual materials from the Daniel Carter Beard papers.
- Becker, Florence Deakins, 1878-1969. Florence Deakins Becker papers, 1891-1963.
- Becker, George F. (George Ferdinand), 1847-1919. George F. Becker papers, 1814-1928.
- Beckley, Alfred, 1802-1888. Alfred Beckley papers.
- Beckley family. John James Beckley family papers, 1789-1918.
- Beckley, John James, 1757-1807. John James Beckley family papers, 1789-1918.
- Beerits, Henry C. Henry C. Beerits papers.
- Bela Lyon Pratt papers, 1884-1918.
- Belgian children's letters to President Woodrow Wilson, 1915.
- Belknap, George E. (George Eugene), 1832-1903. George E. Belknap papers, 1857-1903.
- Belknap, Reginald Rowan, 1871-1959. Reginald Rowan Belknap papers, 1784-1929.
- Bell, Alexander Graham, 1847-1922. Alexander Graham Bell family papers, 1834-1974.
- Bell, Alexander Melville, 1819-1905. Alexander Melville Bell papers.
- Bell family. Alexander Graham Bell family papers, 1834-1974.
- Bell, Mabel Gardiner Hubbard, 1857-1923. Mabel Gardiner Hubbard Bell papers.
- Belle Brown collection, 1865-1912.
- Belle Roosevelt papers.
- Belmont, Alva, 1853-1933. Alva Belmont scrapbook collection.
- Belmont-Paul Women's Equality National Monument. Belmont-Paul Women's Equality National Monument records.
- Belo, Jane, 1904-1968. Jane Belo papers.
- Ben B. Lindsey papers, 1838-1957.
- Bendire, Charles, 1836-1897. Charles Bendire papers, 1874-1919.
- Benedict, Ruth, 1887-1948. Ruth Benedict papers.
- Benjamin C. Gruenberg and Sidonie Matsner Gruenberg papers, 1878-1972.
- Benjamin C. Gruenberg papers.
- Benjamin Clarke Marsh papers, 1910-1950.
- Benjamin Delahauf Foulois papers, 1898-1966.
- Benjamin, Harold Raymond Wayne, 1893-1969. Harold Raymond Wayne Benjamin papers, 1908-1972.
- Benjamin Harrison papers, 1780-1948.
- Benjamin, Herbert, 1900-1983. Herbert Benjamin papers, 1915-2004.
- Benjamin Holt Ticknor papers, 1595-1935.
- Benjamin K. Edwards collection.
- Benjamin S. Custer papers, 1912-2000.
- Benjamin T. Montgomery family papers, 1872-1987.
- Benjamin V. Cohen papers, 1902-1983.
- Bennett, Frank M. (Frank Marion), 1857-1924. Frank M. Bennett papers, 1893-1909.
- Benney, William A. William A. Benney papers, 1920-1966.
- Benson, William Shepherd, 1855-1932. William Shepherd Benson papers, circa 1791-1952.
- Berge, George W., 1864-1925. George W. Berge business records. 1907.
- Berge, Wendell, 1903-1955. Wendell Berge papers, 1907-1950.
- Berlepsch, Hans Hermann Carl Ludwig, Graf von, 1850-1915. Hans Hermann Carl Ludwig, Graf von Berlepsch, correspondence, 1874-1913.
- Berlin, Irving, 1888-1989. Irving Berlin collection, 1895-1990.
- Berliner, Emile, 1851-1929. Emile Berliner collection, 1871-1965.
- Bernadotte Everly Schmitt papers, 1868-1970.
- Bernays, Edward L., 1891-1995. Edward L. Bernays papers, 1777-1994.
- Berryman, Clifford Kennedy, 1869-1949. Clifford Kennedy Berryman papers, 1814-1965.
- Bertha W. Edwards collection on Hiram Simmons, 1907-1980.
- Bertrand N.O. Walker papers, 1899-1921.
- Bess Furman papers, 1728-1967.
- Betances, Ramón Emeterio, 1827-1898. Ramón Emeterio Betances correspondence.
- Beveridge, Albert J. (Albert Jeremiah), 1862-1927. Albert J. Beveridge papers, 1788-1943.
- Bickerdyke, Mary Ann, 1817-1901. Mary Ann Bickerdyke papers, 1847-1905.
- Biddle, George, 1885-1973. George Biddle papers, 1863-1973.
- Bigelow, John, 1817-1911. John Bigelow abstract of diary. 1886-1911.
- Bigelow, John, 1854-1936. John Bigelow papers, 1492-1936.
- Billings, Warren K., 1893-1972. Warren K. Billings papers, 1899-1973.
- Billy Sunday papers.
- Bingham, Theo. A. (Theodore Alfred), 1858-1934. Theo. A. Bingham papers, 1897-1903.
- Blackwell family papers.
- Blackwell family. Visual materials from the Blackwell family papers.
- Blandy, William H. P. (William Henry Purnell), 1890-1954. William H.P. Blandy papers, 1913-1977.
- Blatch, Harriot Stanton, 1856-1940. Harriot Stanton Blatch papers, 1907-1915.
- Bledsoe, Albert Taylor, 1809-1877. Albert Taylor Bledsoe papers.
- Bliss, Tasker Howard, 1853-1930. Tasker Howard Bliss collection of World War I maps and related materials.
- Bliss, Tasker Howard, 1853-1930. Tasker Howard Bliss papers, 1864-1933.
- Bloch collection, 1888-1981.
- Bloch, Ernest, 1880-1959. Eric Johnson collection of Ernest Bloch photographs. 1896-2008.
- Bloch, Ernest, 1880-1959. Ernest Bloch collection, 1888-1981.
- Block, Ralph, 1889-1974. Ralph Block papers, 1872-1971.
- Boardman, Mabel Thorp, 1860-1946. Mabel Thorp Boardman papers, 1853-1945.
- Boas, Franz, 1858-1942. Franz Boas papers, 1878-1943.
- Boas, Franziska, 1902-1988. Franziska Boas collection, 1920-1988.
- Bob Fosse and Gwen Verdon collection, 1920-1991.
- Boggs, Samuel Whittemore, 1889-1954. Samuel Whittemore Boggs papers, 1912-1954.
- Boissevain, Eugen, 1880-1949. Eugen Boissevain papers.
- Bok, Edward William, 1863-1930. Edward William Bok papers, 1880-1926.
- Bolm, Adolph, 1884-1951. Adolph Bolm collection, 1895-1982.
- Bonaparte, Charles J. (Charles Joseph), 1851-1921. Charles J. Bonaparte papers, 1760-1921.
- Bonaparte, Marie, Princess, 1882-1962. Princess Marie Bonaparte papers, 1889-1962.
- Bonsal, Stephen, 1865-1951. Stephen Bonsal papers, 1890-1973.
- Bonynge, Robert W. (Robert William), 1863-1939. Robert W. Bonynge papers, 1881-1939.
- Booker T. Washington papers, 1853-1946.
- Boone, Blind, 1864-1927. John William "Blind" Boone music, ca. 1907-1918.
- Boone, Joel Thompson, 1889-1974. Joel Thompson Boone papers, 1755-1971.
- Borah, William Edgar, 1865-1940. William Edgar Borah papers, 1905-1940.
- Borglum, Gutzon, 1867-1941. Gutzon Borglum papers, 1881-2019.
- Borglum, Lincoln, 1912-1986. Lincoln Borglum papers.
- Borglum, Mary Montgomery, 1874-1955. Mary Montgomery Borglum papers.
- Borglum, Solon Hannibal, 1868-1922. Solon Hannibal Borglum papers, 1886-1969.
- Boris Brasol papers, 1919-1954.
- Bowker, R. R. (Richard Rogers), 1848-1933. R.R. Bowker papers, 1831-1931.
- Bowles, Edward Lindley, 1897-1990. Edward Lindley Bowles papers, 1869-1990.
- Brand Whitlock papers, 1890-1934.
- Brasol, Boris, 1885-1963. Boris Brasol papers, 1919-1954.
- Brayer, Herbert Oliver. Western range cattle and other industries study papers, 1823-1947.
- Breckinridge, Clifton Rodes, 1846-1932. Clifton Rodes Breckinridge papers.
- Breckinridge, Desha, 1867-1935. Desha Breckinridge papers.
- Breckinridge family. Breckinridge family papers, 1752-1980.
- Breckinridge family papers, 1752-1965.
- Breckinridge, Henry, 1886-1960. Henry Breckinridge papers.
- Breckinridge, Isabella Goodrich, 1874-1961. Isabella Goodrich Breckinridge papers.
- Breckinridge, John, 1760-1806. John Breckinridge papers.
- Breckinridge, John C. (John Cabell), 1821-1875. John C. Breckinridge papers.
- Breckinridge, Joseph Cabell, 1842-1920. Joseph Cabell Breckinridge papers.
- Breckinridge, Katherine Carson. Katherine Carson Breckinridge papers.
- Breckinridge Long papers, 1486-1948.
- Breckinridge, Madeline McDowell, 1872-1920. Madeline McDowell Breckinridge papers.
- Breckinridge, Robert J. (Robert Jefferson), 1800-1871. Robert J. Breckinridge papers.
- Breckinridge, Sophonisba P. (Sophonisba Preston), 1866-1948.. Sophonisba Preston Breckinridge papers.
- Breckinridge, William Campbell Preston, 1837-1904. William Campbell Preston Breckinridge papers.
- Brent, Charles Henry, 1862-1929. Charles Henry Brent papers, 1860-1991.
- Brett Riggs influenza pandemic archive, 1891-1945.
- Breuer, Josef, 1842-1925. Josef Breuer papers, 1859-1970.
- Brill, A. A. (Abraham Arden), 1874-1948. A.A. Brill papers, 1888-1994.
- Brill, Kittie Rose. Kittie Rose Brill papers.
- Bristol, Helen Moore. Helen Moore Bristol papers.
- Bristol, Mark L. (Mark Lambert), 1868-1939. Mark L. Bristol papers, 1882-1939.
- Bronislava Nijinska collection, circa 1740-1996.
- Bronson M. Cutting papers, 1890-1950.
- Brooks, Charlotte, 1918-1998. Charlotte Brooks papers. 1831-1999.
- Brooks family. Kendrick-Brooks family papers, 1831-2000.
- Brown, Belle. Belle Brown collection, 1865-1912.
- Brown, Orie O. Orie O. Brown papers. 1891-1893.
- Brown, Ray Eber, 1892-1962. Ray Eber Brown papers, 1915-1962.
- Browne, Charles Albert, 1870-1947. Charles Albert Browne papers, 1783-1947.
- Brownson, Willard H. (Willard Herbert), 1845-1935. Willard H. Brownson papers, 1859-1932.
- Bruce, Eugene S. (Eugene Sewell), 1860-1920. Eugene S. Bruce papers.
- Bruce Rogers materials, 1200-1957.
- Brundage, Percival Flack, 1892-1979. Percival Flack Brundage papers, 1918-1979.
- Bryan, William Jennings, 1860-1925. William Jennings Bryan papers, 1877-1940.
- Bryson B. Rash papers, 1918-1992.
- Bryson, Lyman, 1888-1959. Lyman Bryson papers, 1893-1978.
- Buchman, Frank, 1878-1961. Frank Buchman papers. 1873-1966.
- Buck, Dudley, 1839-1909. Dudley Buck papers, 1861-1939.
- Bucke, Richard Maurice, 1837-1902. Richard Maurice Bucke papers.
- Buell, Raymond Leslie, 1896-1946. Raymond Leslie Buell papers, 1915-1981.
- Building and Grounds Division series, Library of Congress archives, 1871-1954.
- Bullard, Robert Lee, 1861-1947. Robert Lee Bullard papers, 1881-1955.
- Bunau-Varilla, Philippe, 1859-1940. Philippe Bunau-Varilla papers, 1877-1955.
- Burbank family. Burbank-Van Voorhis families papers, 1814-1913.
- Burbank family papers.
- Burbank, Luther, 1849-1926. Luther Burbank papers, 1830-1989.
- Burbank, Sidney, 1807-1882. Sidney Burbank diaries. 1839-1880.
- Burbank, Sullivan, 1776-1862. Sullivan Burbank diary. 1814-1823.
- Burbank-Van Voorhis families papers, 1814-1913.
- Burleson, Albert Sidney, 1863-1937. Albert Sidney Burleson papers, 1845-1943.
- Burlingame, Anson, 1820-1870. Anson Burlingame and Edward L. Burlingame family papers, 1810-1922.
- Burlingame, Edward L. (Edward Livermore), 1848-1922. Anson Burlingame and Edward L. Burlingame family papers. 1810-1922.
- Burlingame family. Anson Burlingame and Edward L. Burlingame family papers, 1810-1922.
- Burlingame family papers.
- Burlingame, Jane Cornelia Livermore, 1825-1888. Jane Cornelia Livermore Burlingame papers.
- Burnett, Edmund Cody, 1864-1949. Edmund Cody Burnett papers, 1765-1967.
- Burnett, Frances Hawks Cameron. Frances Hawks Cameron Burnett papers, 1818-1936.
- Burroughs, John, 1837-1921. Clara Barrus and John Burroughs papers. 1877-1981.
- Burt, Andrew Gano, 1810-1875. Andrew Gano Burt diary and correspondence. 1851.
- Burt, Andrew Sheridan, 1839-1915. Andrew Sheridan Burt papers. 1864-1880.
- Burt, Elizabeth, 1839-1926. Elizabeth Burt papers, 1797-1917.
- Burton Egbert Stevenson papers, 1900-1951.
- Burton Kline papers, 1896-1954.
- Burton Norvell Harrison family papers, 1812-1926.
- Busby, William L., -1919 William L. Busby papers.
- Butterfield, Kenyon L. (Kenyon Leech), 1868-1935. Kenyon L. Butterfield papers, 1889-1970.
- Butterworth, Jack L. Jack Butterworth collection of silent film cues, 1917-1929.
- B.W. Huebsch papers, 1893-1964.
C
- C. Chaillé-Long papers, 1809-1918.
- C. Hart Merriam papers, 1864-1938.
- Caleb Henry Carlton papers, 1831-1954.
- Callan, John Lansing, 1886-1958. John Lansing Callan papers, 1907-1956.
- Calvin Coolidge papers, 1915-1932.
- Cameron family. Miles-Cameron families correspondence, 1661-1956.
- Cameron family papers.
- Campbell, Charles Francis Faulkner, 1876- Charles Francis Faulkner Campbell papers.
- Campbell family. Campbell-Preston-Floyd families papers, 1741-1931.
- Campbell family papers.
- Campbell, Francis Joseph, Sir, 1834-1914. Sir Francis Joseph Campbell papers, 1870-1935.
- Campbell, George A. (George Ashley), 1870-1954. George A. Campbell papers.
- Campbell-Preston-Floyd families papers, 1741-1931.
- Campbell, Sophia Faulkner. Sophia Faulkner Campbell papers.
- Canal Zone Library-Museum. Canal Zone Library-Museum Panama Collection, 1804-1977.
- Canal Zone Library-Museum Panama Collection, 1804-1977.
- Capek, Thomas, 1861-1950. Thomas Capek collection of materials relating to Czechoslovakia and Czech Americans, 1619-1953.
- Caperton, William Banks, 1855-1941. William Banks Caperton papers, 1873-1939.
- Cardozo family. Francis Lewis Cardozo family papers, 1864-1968.
- Cardozo, Francis Lewis, 1836-1903. Francis Lewis Cardozo family papers, 1864-1968.
- Carl Brent Swisher collection of research material relating to Roger Brooke Taney, 1836-1962.
- Carl Brent Swisher papers.
- Carl Conrad Loth papers, 1896-1967.
- Carl Koller papers, 1866-1988.
- Carl Schurz papers, 1837-1983.
- Carl Schurz Vrooman papers, 1872-1975.
- Carlisle, Horace Callaway, 1871-1957. Horace Callaway Carlisle poems, 1900-1956.
- Carlton, Caleb Henry, 1836-1923. Caleb Henry Carlton papers, 1831-1954.
- Carman, Ezra Ayers, 1834-1909. Ezra Ayers Carman papers, 1861-1909.
- Carnegie, Andrew, 1835-1919. Andrew Carnegie papers, 1803-1935.
- Carnegie Endowment for International Peace, Mexican Revolution newspaper clippings archive. 1911-1913.
- Carpenter collection, 1891-1961.
- Carpenter, Frances, 1890-1972. Frances Carpenter collection relating to Frank G. Carpenter, 1875-1960.
- Carpenter, Frank G. (Frank George), 1855-1924. Frances Carpenter collection relating to Frank G. Carpenter, 1875-1960.
- Carpenter, Fred W., 1873 or 1874-1957 Fred W. Carpenter papers.
- Carpenter, John Alden, 1876-1951. John Alden Carpenter collection, 1891-1961.
- Carr, Wilbur J. (Wilbur John), 1870-1942. Wilbur J. Carr papers, 1892-1942.
- Carrère, John Merven, 1858-1911. John Merven Carrère papers, 1894-1911.
- Carrie Chapman Catt papers, 1848-1950.
- Carrie Fulton Phillips papers.
- Carrie Jacobs-Bond collection, circa 1896-circa 1944.
- Carroll, Raymond G., 1876?-1943. Raymond G. Carroll papers, 1905-1944.
- Carter Godwin Woodson papers, 1736-1974.
- Carter, Isabel Gordon, 1897- Isabel Gordon Carter collection, 1921-1942.
- Carter, Lucy Grymes Lee, 1786-1860. Lucy Grymes Lee Carter papers.
- Carter, Thomas Henry, 1854-1911. Thomas Henry Carter papers, 1883-1917.
- Carter, W. Beverly (William Beverly), 1921-1982. W. Beverly Carter papers, 1924-1997.
- Casey, Silas, 1841-1913. Silas Casey papers, 1771-1941.
- Cass Gilbert papers, 1841-1961.
- Castelnuovo-Tedesco, Mario, 1895-1968. Mario Castelnuovo-Tedesco papers, 1822-1998.
- Castle family. Henry Northrup Castle family papers, 1394-1920.
- Castle family papers.
- Catt, Carrie Chapman, 1859-1947. Carrie Chapman Catt papers, 1848-1950.
- Cattell, James McKeen, 1860-1944. James McKeen Cattell papers, 1835-1948.
- Cerise C. Jack papers relating to the Sacco and Vanzetti case, circa 1921-1999.
- Cesi Kellinger collection of dance materials, 1842-1994.
- Cesi Kellinger dance collection.
- Chaillé-Long, C. (Charles), 1842-1917. C. Chaillé-Long papers, 1809-1918.
- Chamberlain, Eugene Tyler, 1856-1929. Eugene Tyler Chamberlain collection relating to French orphans of World War I, 1916-1927.
- Chamberlain, Joshua Lawrence, 1828-1914. Joshua Lawrence Chamberlain papers, 1775-1913.
- Chamberlin, Anne Locke Bixby, 1874-1967. Anne Locke Bixby Chamberlin family papers, 1793-1924.
- Chambers, Washington Irving, 1856-1934. Washington Irving Chambers papers, 1871-1943.
- Chancellor, William Estabrook, 1867-1963. Warren Gamaliel Harding: president of the United States; a review of facts collected from anthropological, historical, and political researches. 1922.
- Chancey, Odrey Verne Walker, 1889-1971. Odrey Verne Walker Chancey autobiography.
- Chandler P. Anderson papers, 1894-1953.
- Chandler, William E. (William Eaton), 1835-1917. William E. Chandler papers, 1863-1917.
- Chanute, Octave, 1832-1910. Octave Chanute papers, 1807-1955.
- Charles Albert Browne papers, 1783-1947.
- Charles B. Elliott papers, 1910-1912.
- Charles Bendire papers, 1874-1919.
- Charles Bowdoin Fillebrown papers, 1879-1928.
- Charles Burke Elliott papers.
- Charles Chaillé-Long papers.
- Charles E. Feinberg collection.
- Charles E. Goad fire insurance map collection, 1894-1909.
- Charles Edmund Worth collection, 1917-1919.
- Charles Edward Russell papers, 1864-1941.
- Charles Evans Hughes papers, 1836-1950.
- Charles Follen McKim papers, 1838-1929.
- Charles Hambitzer music manuscripts, circa 1910-1918.
- Charles Henry Brent papers, 1860-1991.
- Charles Henry Fromuth papers, 1884-1937.
- Charles Henry Webb papers, 1859-1924.
- Charles J. Bonaparte papers, 1760-1921.
- Charles Julius Allen and Grace Elizabeth Allen papers, 1865-1976.
- Charles Julius Allen papers.
- Charles Linza McNary papers, 1921-1944.
- Charles Maass papers, 1912-1924.
- Charles Mason Remey family papers, 1778-1949.
- Charles Miller collection of music manuscripts, 1924-1945.
- Charles Monroe Dickinson papers, 1897-1923.
- Charles Moore papers, 1848-1944.
- Charles N. Elliot collection, 1873-1951.
- Charles N. Elliot papers.
- Charles O'Neil papers, 1833-1927.
- Charles Oscar Maas map collection, 1920-1997.
- Charles P. Taft papers, 1816-1983.
- Charles Pelot Summerall map collection.
- Charles Pelot Summerall papers, 1880-1955.
- Charles Perley Smith papers, 1920-1946.
- Charles Russell Train papers, 1898-1967.
- Charles S. Hamlin papers, 1869-1968.
- Charles S. Sperry papers, 1862-1912.
- Charles Tournemire collection, circa 1868-1962.
- Charles W. Hack papers, circa 1800-1926.
- Charles W. Sirch papers, 1878-1935.
- Charles Warren papers, 1874-1954.
- Charles Withers papers, 1917-1942.
- Charlotte Everett Hopkins collection of National Civic Federation. Woman's Department. District of Columbia Section records, 1900-1926.
- Charlotte Everett Hopkins papers.
- Chase, Emma Lester, 1885- Emma Lester Chase papers.
- Chase, Lewis Nathaniel, 1873-1937. Lewis Nathaniel Chase papers, 1836-1947.
- Chase, Pearl-Adell, 1872-1955. Pearl-Adell Chase papers.
- Chauncy, Elnathan, 1724-1796. Elnathan Chauncy sermons.
- Cheney, John Vance, 1848-1922. John Vance Cheney papers, 1847-1927.
- Chester, Colby Mitchell, 1844-1932. Colby Mitchell Chester papers, 1913-1928.
- Child, Warren G. (Warren Gerald), 1883-1938. Warren G. Child papers, 1907-1942.
- Chittick, Elizabeth, 1908-2009. Elizabeth Chittick papers.
- Choate, Joseph Hodges, 1832-1917. Joseph Hodges Choate papers, 1745-1929.
- Christian A. Fleetwood papers, 1797-1945.
- Christian Abraham Fleetwood papers.
- Christiancy and Pickett families papers, 1835-1998.
- Christiancy family. Christiancy and Pickett families papers, 1835-1998.
- Christiancy family papers.
- Christiancy, Henry Clay, 1841-1925. Henry Clay Christiancy papers.
- Christiancy, James Isaac, 1843-1899. James Isaac Christiancy papers.
- Christopher Dodrill collection on John Philip Sousa, 1876-1992.
- Christopher Dodrill - John Philip Sousa papers, 1876-1992.
- Chronicles of America photoplays papers, 1920s.
- Chronicles of America Picture Corporation Chronicles of America photoplays papers, 1920s.
- Clapp, Asa, 1762-1848. Asa Clapp papers.
- Clapp, Asa W. H. (Asa William Henry), 1805-1891. Asa William Henry Clapp papers.
- Clapp, Charles Q., 1799-1868. Charles Q. Clapp papers.
- Clapp family. Clapp family papers, 1789-1935.
- Clapp family papers, 1789-1935.
- Clapp, Mary Jane Emerson, 1835-1922. Mary Jane Emerson Clapp papers.
- Clapper, Raymond, 1892-1944. Raymond Clapper papers, 1908-1962.
- Clara Barrus and John Burroughs papers, 1877-1981.
- Clara Barrus papers.
- Clara Barton papers, 1805-1963.
- Clarence Darrow papers, 1894-1941.
- Clarence Edward Mulford papers, 1921-1936.
- Clark, John T., 1883-1949. John T. Clark papers. 1921-1923.
- Clark, Victor S. (Victor Selden), 1868-1946. Victor S. Clark papers, 1827-1944.
- Clarke-Smith, Linda. Rebekah Crawford and Linda Clarke-Smith papers. 1715-1929.
- Cleland, T. M. (Thomas Maitland), 1880-1964. T.M. Cleland papers, 1880-1964.
- Cleveland Abbe papers, 1850-1954.
- Cleveland, Frances Folsom, 1864-1947. Frances Folsom Cleveland papers.
- Cleveland, Grover, 1837-1908. Grover Cleveland papers, 1743-1945.
- Clifford Kennedy Berryman papers, 1814-1965.
- Clyde Wilbur Russell collection, 1917-1919.
- Cobb, Edith, 1895-1977. Edith Cobb papers.
- Coblentz, William W. (William Weber), 1873-1962. William W. Coblentz papers, 1883-1960.
- Coggeshall, Joseph. Joseph Coggeshall account book. 1771-1786.
- Cohen, Benjamin V. Benjamin V. Cohen papers, 1902-1983.
- Colbert, John W. (John William), 1880-1965. John W. Colbert papers, 1895-1966.
- Colby, Bainbridge, 1869-1950. Bainbridge Colby papers, 1863-1950.
- Colby Mitchell Chester papers, 1913-1928.
- Collins, Ross A. (Ross Alexander), 1880-1968. Ross A. Collins papers, 1906-1967.
- Colson, Lewis Whitfield, 1880-1961. Lewis Whitfield Colson papers, 1894-1950.
- Comer, Lucretia Garfield, 1894-1968. Lucretia Garfield Comer papers.
- Conger, Edwin H. (Edwin Hurd), 1843-1907. Edwin H. Conger papers.
- Congressional Union for Woman Suffrage (U.S.). Congressional Union for Woman Suffrage records.
- Connelly family. Ham, Connelly, Parks, and Snodgrass families papers, 1870-2018.
- Connelly family papers.
- Connor, Jeannette Thurber, 1872-1927. Jeannette Thurber Connor collection of Floridiana, 1570-1927.
- Consultants and Fellows series, Library of Congress archives, 1917-1973.
- Cook, Frederick Albert, 1865-1940. Frederick Albert Cook papers, 1881-1977.
- Coolidge, Calvin, 1872-1933. Calvin Coolidge papers, 1915-1932.
- Coolidge, Elizabeth Sprague, 1864-1953. Elizabeth Sprague Coolidge Foundation collection, 1894-1953.
- Coolidge family. Coolidge-Pollard families papers, 1818-2015.
- Coolidge family papers.
- Coolidge-Pollard families papers, 1818-2015.
- Cooper Curtice papers, 1822-1953.
- Cooper, Hewitt & Company (Ringwood, N.J.). Cooper, Hewitt & Company (Ringwood, N.J.) records, 1833-1908.
- Cooper, Hewitt & Company (Ringwood, N.J.) records, 1833-1908.
- Cooperative Recreation Service collection.
- Copeland railroad survey collection.
- Copher, Edith Hulsizer, 1891-1935. Edith Hulsizer Copher papers.
- Copland, Aaron, 1900-1990. Aaron Copland collection, 1841-1991.
- Copland collection, 1841-1991.
- Corbin, Hannah Lee, 1728-1782. Hannah Lee Corbin papers.
- Corbin, Henry Clark, 1842-1909. Henry Clark Corbin papers, 1864-1980.
- Corey, Herbert, 1872-1954. Herbert Corey papers, 1847-1954.
- Cornelia Bryce Pinchot papers, 1899-1960.
- Corona Diamond Syndicate. Corona Diamond Syndicate records. circa 1904-1912.
- Correspondence from the Elizabeth Sprague Coolidge Foundation collection, 1894-1953.
- Correspondence of Elizabeth Mitchell Stephenson Fite and the American National Opera Company, 1864-1951.
- Cortelyou, George B. (George Bruce), 1862-1940. George B. Cortelyou papers, 1871-1948.
- Cottrell, Frederick Gardner, 1877-1948. Frederick Gardner Cottrell papers, 1896-1951.
- Couzens, James, 1872-1936. James Couzens papers, 1903-1940.
- Cowell, Henry, 1897-1965. Henry Cowell music manuscripts, 1909-1965.
- Craven, Thomas T. (Thomas Tingey), 1873-1950. Thomas T. Craven papers, 1842-1969.
- Crawford, Rebekah, 1845-1934. Rebekah Crawford and Linda Clarke-Smith papers, 1715-1929.
- Crawford, Richard, 1738-1798. Richard Crawford account and ledger books. 1753-1830.
- Creel, George, 1876-1953. George Creel papers, 1857-1953.
- Cresson, Margaret French, 1889-1973. Margaret French Cresson papers. 1915-1962.
- Crocker, Edward S., II, 1896-1968. Edward S. Crocker II and Lispenard Seabury Crocker papers, 1892-2003.
- Crocker, Lispenard Seabury, 1902-1984. Edward S. Crocker II and Lispenard Seabury Crocker papers.
- Croffut, W. A. (William Augustus), 1835-1915. W.A. Croffut papers, 1774-1933.
- Crosby, Oscar Terry, 1861-1947. Oscar Terry Crosby papers, 1878-1947.
- Cuban Educational Association of the United States of America. Cuban Educational Association of the United States of America records, 1897-1954.
- Cuban Educational Association of the United States of America records, 1897-1954.
- Cui, César, 1835-1918. Syn mandarina.
- Culbertson, William Smith, 1884-1966. William Smith Culbertson papers, 1897-1965.
- Cummings, Harry S., 1866-1917. Harry S. Cummings papers, 1890-1986.
- Cuno Hugo Rudolph papers.
- Cuno Hugo Rudolph scrapbooks, 1910-1929.
- Curry, J. L. M. (Jabez Lamar Monroe), 1825-1903. J.L.M. Curry papers, 1637-1939.
- Curtice, Cooper, 1856-1939. Cooper Curtice papers, 1822-1953.
- Curtis, Joseph O. Joseph O. Curtis papers.
- Curtis L. Malaney papers, 1923-1989.
- Custer, Benjamin S. (Benjamin Scott), 1905-2002. Benjamin S. Custer papers, 1912-2000.
- Cutting, Bronson M., 1888-1935. Bronson M. Cutting papers, 1890-1950.
- Cutts family. Cutts family papers, 1755-1957.
- Cutts family papers, 1755-1957.
- Cyrilla Barr research materials on Elizabeth Sprague Coolidge, 1864-2000.
- Cyrus Robinson Miller papers, 1897-1940.
D
- D. Heywood Hardy papers, 1913-1924.
- Daley, William L. William L. Daley collection relating to Billy Sunday. 1914-1925.
- Damrosch, Frank, 1859-1937. Damrosch - Tee Van Collection. 1856-1969.
- Damrosch, Leopold, 1832-1885. Damrosch - Tee Van collection, 1856-1969.
- Damrosch - Tee Van collection, 1856-1969.
- Daniel Augustus Tompkins papers, 1887-1920.
- Daniel Chester French papers, circa 1848-1968.
- Daniel Edgar Sickles papers, 1821-1918.
- Daniel Scott Lamont papers, 1853-1928.
- Daniels, Josephus, 1862-1948. Josephus Daniels papers, 1829-1948.
- Danilova, Alexandra, 1907-1997. Alexandra Danilova collection, 1920-2000.
- Darrow, Clarence, 1857-1938. Clarence Darrow papers, 1894-1941.
- David E. Finley papers, 1921-1977.
- David Herbert Lawrence papers.
- David Homer Bates papers, 1837-1926.
- David Maydole Matteson papers, 1876-1937.
- David Oppenheim papers, 1910-2004.
- Davidson, Jo, 1883-1952. Jo Davidson papers, 1906-1952.
- Davies, Joseph Edward. Joseph Edward Davies papers, 1860-1958.
- Davis, J. C. Bancroft (John Chandler Bancroft), 1822-1907. J.C. Bancroft Davis papers, 1849-1902.
- Davis, James J. (James John), 1873-1947. James J. Davis papers, 1895-1946.
- Davis, Jefferson, 1808-1889. Jefferson Davis papers, 1795-1913.
- Davis, Norman H. (Norman Hezekiah), 1878-1944. Norman H. Davis papers, 1898-1979.
- Dawes, Anna Laurens, 1851-1938. Anna Laurens Dawes papers.
- Dawes, Electa Allen Sanderson, 1822-1901. Electa Allen Sanderson Dawes papers.
- Dawes, Henry L. (Henry Laurens), 1816-1903. Henry L. Dawes papers, 1833-1933.
- Day, F. Holland (Fred Holland), 1864-1933. F. Holland Day papers, 1793-2010.
- Day, William R. (William Rufus), 1849-1923. William R. Day papers, 1820-1923.
- De Forest, Lee, 1873-1961. Lee de Forest papers, 1884-1955.
- Deane, Ruthven 1851-1934. Ruthven Deane bookplate collection.
- Decatur, Stephen, 1779-1820. Stephen Decatur papers.
- Declaration of Independence collection, 1776-1942.
- Deisch, Noel, 1892-1978. Noel Deisch papers, 1910-1937.
- Demens, Peter A., 1850-1919. Peter A. Demens papers, 1880-2000.
- Denby family. Denby family papers, 1850-1911.
- Denby family papers, 1850-1911.
- Denishawn School of Dancing. Grace McCrea papers relating to Denishawn. 1913-1969.
- Dennett, Tyler, 1883-1949. Tyler Dennett collection relating to John Hay, 1861-1937.
- Densmore, Frances, 1867-1957. Frances Densmore papers, 1883-1957.
- Dermot Heywood Hardy papers.
- Desha, Mary, 1850-1911. Mary Desha papers.
- Dewey, George, 1837-1917. George Dewey map collection. (2)
- Dewey, George, 1837-1917. George Dewey papers.
- Dewey, George, 1837-1917. George Dewey papers, 1805-1949.
- Dewey, Mildred McLean Hazen, 1850-1931. Mildred McLean Hazen Dewey papers.
- Deyo, Morton L. (Morton Lyndholm), 1887-1973. Morton L. Deyo papers, 1911-1981.
- Deyo, Morton L. (Morton Lyndholm), 1887-1973. Morton L. Deyo World War II map collection.
- D.H. Lawrence correspondence, notes, and photographs, 1921-1930.
- D.H. Lawrence papers.
- Diaghilev, Serge, 1872-1929. Serge Lifar collection on Serge Diaghilev, 1750-1950.
- Dickerson, Edward E., 1831-1914. Edward E. Dickerson papers, 1861-1991.
- Dickerson, Wilton H. Biographical sketch of Edward E. Dickerson.
- Dickinson, Anna E. (Anna Elizabeth), 1842-1932. Anna E. Dickinson papers, 1859-1951.
- Dickinson, Charles Monroe, 1842-1924. Charles Monroe Dickinson papers, 1897-1923.
- Dike, Samuel W. (Samuel Warren), 1839-1913. Samuel W. Dike papers, 1870-1913.
- Diroca World War 2 map collection.
- Diroca World War II map collection.
- District of Columbia Woman Suffrage Association. District of Columbia Woman Suffrage Association records.
- Dixon, Frederick, approximately 1868-1923. Frederick Dixon papers, 1897-1923.
- Dixon Jones, Mary Amanda. Mary Amanda Dixon Jones papers, 1839-1925.
- Dmitriĭ Antonovich Volkogonov papers, 1887-1995.
- Dock, Mira Lloyd, 1853-1945. Mira Lloyd Dock papers, 1814-1951.
- Dodd, William E. (William Edward), 1869-1940. William Edward Dodd papers, 1895-1955.
- Donald Wilson papers, 1910-1979.
- Donaldson, David K. David K. Donaldson papers.
- Donaldson family. Pike-McConnell-Donaldson family papers, 1770-1967.
- Donaldson, Lavinia Pike McConnell. Lavinia Pike McConnell Donaldson papers.
- Donch, Henry, 1834-1919. Henry Donch performance library, 1811-1928.
- Donnan, Elizabeth, 1883-1955. Elizabeth Donnan papers.
- Doriot, Georges F. (Georges Frederic), 1899-1987. Georges F. Doriot papers, 1917-1985.
- Dorn, Edward John, 1854-1937. Edward John Dorn papers, 1868-1936.
- Dorothea Dix Lawrence collection, 1856-1980.
- Dorothy G. Wayman papers, 1862-1971.
- Dorsett, Edward Lee, 1883- Edward Lee Dorsett naval historical collection, 1814-1926.
- Dorsey William Hyde papers, 1757-1955.
- Doubleday & Company, Inc. Ken McCormick collection of Doubleday and Company, inc., records. 1882-1992.
- Doubleday and Company, inc., records.
- Douglas, William O. (William Orville), 1898-1980. William O. Douglas papers, 1801-1980.
- Doysié, Abel, 1886-1973. Abel Doysié papers, 1910-1967.
- Driver, William M., -1943 William M. Driver papers.
- Du Pont, Jean Kane Foulke, 1891-1985. Jean Kane Foulke Du Pont papers.
- Dudley Buck papers, 1861-1939.
- Dudley Wright Knox papers, 1864-1950.
- Duke, Vernon, 1903-1969. Vernon Duke collection, 1918-1968.
- Duncan Emrich autograph album collection, 1843-1956.
- Dunham, Katherine. Katherine Dunham collection, 1920-2006.
- Dunn, Lucius C. (Lucius Claude), 1885-1963. Lucius C. Dunn papers, 1902-1957.
- Dunston, Gatewood W. Gatewood W. Dunston collection relating to William Surrey Hart, 1914-1955.
- Dupuis-Delcourt, 1802-1864. Tissandier collection on the history of aeronautics. 1539-1929.
E
- E. Alexander Powell papers, 1893-1957.
- Earl, Ralph, 1751-1801. Ralph Earl papers. 1815-1839.
- Early, Jubal Anderson, 1816-1894. Jubal Anderson Early papers, 1829-1930.
- Eddie Rickenbacker papers, 1915-1973.
- Edgar Alexander Mearns papers, 1864-1918.
- Edgar D. Andrews collection 1917-1974.
- Edgar Stanton Maclay papers, 1782-circa 1918.
- Edison sheet music collection, 1830-1958.
- Edith Benham Helm papers, 1915-1961.
- Edith Jacobson papers, 1922-1977.
- Edmund Clarence Stedman papers, 1871-1923.
- Edmund Cody Burnett papers, 1765-1967.
- Edna St. Vincent Millay papers, 1830-2013.
- Edoardo Weiss papers, 1919-1970.
- Edward E. Dickerson papers, 1861-1991.
- Edward Everett Hayden family papers, 1817-1963.
- Edward Goodrich Acheson papers, 1872-1968.
- Edward Henry Loudenbeck collection, 1917-1919.
- Edward John Dorn papers, 1868-1936.
- Edward L. Bernays papers, 1777-1994.
- Edward L. Thorndike papers, 1900-1938.
- Edward Lee Dorsett naval historical collection, 1814-1926.
- Edward Lee Thorndike papers.
- Edward Lindley Bowles papers, 1869-1990.
- Edward MacDowell Association. Edward MacDowell Association records.
- Edward Miner Gallaudet papers.
- Edward Nealy Kellogg and Edward Stanley Kellogg papers, 1858-1937.
- Edward Nealy Kellogg papers.
- Edward Otto Tabor papers, 1918-1948.
- Edward S. Crocker II and Lispenard Seabury Crocker papers, 1892-2003.
- Edward S. Crocker II papers.
- Edward Settle Godfrey papers, 1863-1933.
- Edward Stanley Kellogg papers.
- Edward W. Washburn family papers, 1817-1934.
- Edward William Bok papers, 1880-1926.
- Edward Willis papers, 1854-1906.
- Edwards, Benjamin K. Benjamin K. Edwards collection.
- Edwin Arlington Robinson papers, 1913-1940.
- Edwin Markham papers, circa 1893-1937.
- Einstein, Albert, 1879-1955. Albert Einstein papers, 1916-1953.
- Elder, Abram P. T. (Abram Peter Turner). Abram P.T. Elder papers, 1890-1916.
- Eleanor Lord Pray papers, 1894-1975.
- Elihu Root papers.
- Elihu Root papers, 1863-1937.
- Elijah Walker Halford papers, 1848-1938.
- Elinor Remick Warren papers, 1872-2004.
- Elizabeth Burt papers, 1797-1917.
- Elizabeth Cady Stanton papers, 1814-1946.
- Elizabeth Madox Roberts papers, 1921-1941.
- Elizabeth Robins Pennell papers.
- Elizabeth Severn and Margaret Severn papers, 1880-1994.
- Elizabeth Severn papers.
- Elizabeth Sprague Coolidge Foundation collection, 1894-1953.
- Ellen N. La Motte collection on opium traffic, 1919-1933.
- Ellery C. Stowell papers, 1805-1952.
- Elliot, Charles N. (Charles Nathan), 1873- Charles N. Elliot collection, 1873-1951.
- Elliot Snow papers, 1790-1942.
- Elliott, Charles B. (Charles Burke), 1861-1935. Charles B. Elliott papers, 1910-1912.
- Ellsworth family. Oliver Ellsworth family papers, 1762-1907.
- Ellsworth, Oliver, 1745-1807. Oliver Ellsworth family papers, 1762-1907.
- Ellyson, Theodore Gordon, 1885-1928. Theodore Gordon Ellyson papers, 1912-1951.
- Elmo N. Pickerill papers, 1910-1975.
- Emerson, Ralph Waldo, 1803-1882. Ralph Waldo Emerson journal.
- Emile Berliner collection, 1871-1965.
- Emily A. Stewart collection of Elihu Root material, 1885-1959.
- Emmons, Samuel Franklin, 1841-1911. Samuel Franklin Emmons papers, 1725-1914.
- Emory Scott Land papers, 1901-1972.
- Emory, William H. (William Hemsley), 1846-1917. William H. Emory papers, 1877-1948.
- Emrich, Duncan, 1908-1977. Duncan Emrich autograph album collection, 1843-1956.
- Engineering Societies Library Collection (Library of Congress).
- Engineering Societies Library. Engineering Societies Library map collection.
- Engineering Societies Library map collection.
- Eno, Amos R. (Amos Richard), 1810-1898. Amos R. Eno papers.
- Eric Johnson collection of Ernest Bloch photographs, 1896-2008.
- Erickson, John Edward, 1863-1946. Thomas James Walsh and John Edward Erickson papers (1910-1934).
- Ernest Bloch collection, 1888-1981.
- Ernest Irving Lewis papers, 1897-1944.
- Ernest John Swift papers, 1908-2019.
- Erwin F. Smith papers, 1876-1927.
- Erwin Frink Smith papers.
- Etelka Freund collection on Béla Bartók, 1903-1971.
- Ethel Armes collection of Lee family papers, 1671-1936.
- Ethel Bartlett and Rae Robertson music and other papers, 1914-1970.
- Ethel M. Fair map collection.
- Eugene Gano Hay papers, 1770-1933.
- Eugene Meyer papers, 1864-1975.
- Eugene Tyler Chamberlain collection relating to French orphans of World War I, 1916-1927.
- Eugenio Carlos de Hostos papers.
- Eugenio María de Hostos and Eugenio Carlos de Hostos papers, 1865-1990.
- Eugenio María de Hostos papers.
- Eva Le Gallienne papers, 1823-1997.
- Evalyn Walsh McLean papers, 1874-1948.
- Evelyn Briggs Baldwin papers, 1649-1933.
- Evelyn Wadsworth Symington collection of John Hay material, 1864-1905.
- Everett, Alexander Hill, 1790-1847. Alexander Hill Everett papers.
- Everett Sanders papers, 1913-1950.
- Everett Strait Hughes map collection.
- Everett Strait Hughes papers, 1903-1975.
- Eversman, Alice, 1885-1974. Alice Eversman and Elena de Sayn papers, 1862-1970s.
- Ewing Harry Miller collection, 1917-1923.
- Exchange and Gift Division series, Library of Congress archives, 1893-1979.
- Ezra Ayers Carman papers, 1861-1909.
F
- F. Holland Day papers, 1793-2010.
- F. Lamson-Scribner papers, 1885-1938.
- Fair, Ethel M. (Ethel Marion). Ethel M. Fair map collection.
- Fairchild, Marian, 1880-1962. Marian Fairchild papers.
- Farley, James A. (James Aloysius), 1888-1976. James A. Farley papers, 1790-1976.
- Farrar, Geraldine, 1882-1967. Geraldine Farrar papers, 1895-1960s.
- Farrior family papers.
- Farrior, Stacy Conrad, 1889-1975. Stacy Conrad Farrior family papers, 1907-1949.
- Fay collection.
- FBJ collection.
- Feamster family. Feamster family papers. 1794-1967.
- Feamster family papers, 1794-1967.
- Federn, Paul. Paul Federn papers, 1864-1975.
- Feinberg, Charles E., 1899-1988. Charles E. Feinberg papers.
- Feinberg, Charles E., 1899-1988. Visual materials from the Walt Whitman papers in the Charles E. Feinberg collection.
- Feinberg, Charles E., 1899-1988. Walt Whitman papers in the Charles E. Feinberg collection.
- Feinberg, Charles E., 1899-1988. Walt Whitman papers in the Charles E. Feinberg collection, 1763-1985.
- Feist collection, 1880-1930.
- Feist, Leo, 1869-1930. Leo Feist collection, 1880-1930.
- Felix Frankfurter papers, 1846-1966.
- Felton, William Hamilton, Jr., 1889-1956. William Hamilton Felton, Jr., collection, 1917-1918.
- Ferde Grofé collection, 1890-1960.
- Fernández Carballido, Rufo Manuel, 1790-1855. Rufo Manuel Fernández Carballido papers.
- Ficher, Jacobo, 1896-1978. Jacobo Ficher collection, 1864-1997.
- Field family. Field-Osgood family papers, 1702-1938.
- Field family papers.
- Field-Osgood family papers, 1702-1938.
- Field, Susan K. Osgood. Susan K. Osgood Field papers.
- Fillebrown, Charles Bowdoin, 1842-1917. Charles Bowdoin Fillebrown papers, 1879-1928.
- Film stills of productions featuring actress May Robson.
- Finley, David E. (David Edward). David E. Finley papers, 1921-1977.
- Fisher, A. K. (Albert Kenrick), 1856-1948. A.K. Fisher papers, 1827-1957.
- Fisher, Anne B. (Anne Benson), 1898-1967 Anne B. Fisher papers.
- Fisher, George P. (George Purnell), 1817-1899. George P. Fisher papers, 1772-1905.
- Fisher, Walter K. (Walter Kenrick), 1878-1953. Walter K. Fisher papers.
- Fisher, Walter L. (Walter Lowrie), 1862-1935. Walter L. Fisher papers, 1871-1963.
- Fiske, Asa Severance, 1833-1925. Asa Severance Fiske papers.
- Fiske, Elizabeth Worthington Hand, 1835-1919. Elizabeth Worthington Hand Fiske papers.
- Fiske family. John Aldrich Stephenson collection of the Hand, Fiske, and Aldrich families papers. 1745-1966.
- Fiske family papers.
- Fiske, Harrison Grey, 1861-1942. Minnie Maddern Fiske and Harrison Grey Fiske papers, 1818-1955.
- Fiske, Minnie Maddern, 1865-1932. Minnie Maddern Fiske and Harrison Grey Fiske papers, 1818-1955.
- Fiske, Samuel Wheelock, 1828-1864. Samuel Wheelock Fiske papers.
- Fite, E. M. S. (Elizabeth Mitchell Stephenson), 1868-1928. Correspondence of Elizabeth Mitchell Stephenson Fite and the American National Opera Company, 1864-1951.
- F.L. and J.C. Olmsted (Firm : 1884-1889). F.L. and J.C. Olmsted (Firm : 1884-1889) records.
- F.L. and J.C. Olmsted (Firm : 1897-1898). F.L. and J.C. Olmsted (Firm : 1897-1898) records. (2)
- F.L. Olmsted and Company. F.L. Olmsted and Company records.
- Flanner, Janet, 1892-1978. Janet Flanner and Solita Solano papers, 1870-1976.
- Flannery, John Spalding, 1870-1954. John Spalding Flannery papers, 1902-1953.
- Flaubert, Gustave, 1821-1880. Salammbo.
- Fleetwood, Christian A. (Christian Abraham), 1840-1914. Christian A. Fleetwood papers, 1797-1945.
- Fleetwood, Sara Iredell Sara Iredell Fleetwood papers.
- Fletcher, Henry Prather, 1873-1959. Henry Prather Fletcher papers, 1898-1958.
- Flexner, Abraham, 1866-1959. Abraham Flexner papers, 1865-1989.
- Fliess, Conrad. Conrad Fliess reminiscences. undated.
- Fliess, Wilhelm, 1858-1928. Wilhelm Fliess papers, 1894-1929.
- Flood, Henry D. (Henry Delaware), 1865-1921. Henry D. Flood papers, 1870-1921.
- Florence Deakins Becker papers, 1891-1963.
- Florence Ellinwood Allen papers, 1907-1965.
- Florence Jaffray Harriman papers, 1857-1982.
- Florence Parr-Gere papers, 1856-1964.
- Floyd family. Campbell-Preston-Floyd families papers, 1741-1931.
- Floyd family papers.
- Foerstel, Lenora, 1929- Lenora Foerstel papers.
- Foote, Arthur, 1853-1937. Arthur Foote music manuscripts 1888-1919.
- Foraker, Joseph Benson, 1846-1917. Joseph Benson Foraker papers, 1884-1916.
- Forbes, W. Cameron (William Cameron), 1870-1959. W. Cameron Forbes papers, 1904-1946.
- Ford, Worthington Chauncey, 1858-1941. Worthington Chauncey Ford papers, 1900-1926.
- Forster, Rudolph, 1872-1943. Rudolph Forster papers, 1898-1943.
- Fortune, Reo, 1903-1979. Reo Fortune papers.
- Fosse, Bob, 1927-1987. Bob Fosse and Gwen Verdon collection, 1920-1991.
- Foster, Idah S. Pratt, 1884-1967. Idah S. Pratt Foster papers, 1912-1967.
- Foulke, William Dudley, 1848-1935. William Dudley Foulke papers, circa 1470-1952.
- Foulois, Benjamin Delahauf, 1879-1967. Benjamin Delahauf Foulois papers, 1898-1966.
- Fowler, Joseph Smith, 1820-1902. Joseph Smith Fowler papers, 1863-1903.
- Fowler, William Chauncey, 1793-1881. William Chauncey Fowler papers.
- Fox, Josiah, 1763-1847. Josiah Fox papers.
- France. Armée. Service géographique. Maps showing entrenchments in France during World War I at a scale of 1:10,000.
- France. Armée. Service géographique. Maps showing entrenchments in France during World War I at a scale of 1:20,000.
- France. Maps showing entrenchments in France during World War I at a scale of 1:20,000.
- Frances Benjamin Johnston papers, 1855-1956.
- Frances Benjamin Johnston photograph collection (Library of Congress). (2)
- Frances Carpenter collection relating to Frank G. Carpenter, 1875-1960.
- Frances Densmore papers, 1883-1957.
- Frances G. Wickes papers, 1896-1996.
- Frances Hawks Cameron Burnett papers, 1818-1936.
- Francis Bowes Sayre papers, 1861-1967.
- Francis Bowler Keene papers, 1856-1975.
- Francis LeJau Parker papers, 1905-1935.
- Francis Lewis Cardozo family papers, 1864-1968.
- Francis Maria Scala collection, 1816-2013.
- Francis Maria Scala papers, 1816-2013.
- Francis Scala papers, 1816-2013.
- Francis Watts Lee papers, 1845-1951.
- Frank G. Carpenter papers.
- Frank George Carpenter papers.
- Frank J. Malina papers, 1912-1986.
- Frank Knox papers, 1898-1954.
- Frank L. Greene papers, 1895-1930.
- Frank L. Stickney papers, 1850-1938.
- Frank Lloyd Wright papers, 1894-1958.
- Frank M. Bennett papers, 1893-1909.
- Frank Maloy Anderson papers, 1895-1961.
- Frank Ross McCoy papers, 1847-1957.
- Frank Van Pelt collection 1917-1931.
- Frank Winfield Woolworth papers, 1859-1980.
- Frankfurter, Felix, 1882-1965. Felix Frankfurter papers, 1846-1966.
- Franklin MacVeagh papers, 1799-1934.
- Franko, Sam, 1857-1937 Autograph collection of musical personalities.
- Frans August Larson family papers, 1864-2021.
- Frantz, Harry W. (Harry Warner), 1891-1982. Harry W. Frantz map collection, 1922-1950.
- Franz Boas papers, 1878-1943.
- Franziska Boas collection, 1920-1988.
- Fred Kenelm Nielsen papers, 1881-1961.
- Frederic Eugene Ives and Herbert Eugene Ives papers, 1869-1957.
- Frederic Eugene Ives papers.
- Frederic William Wile papers.
- Frederic William Wile scrapbooks, 1898-1941.
- Frederick Albert Cook papers, 1881-1977.
- Frederick Cecil Horner papers, 1917-1960.
- Frederick Dixon papers, 1897-1923.
- Frederick Gardner Cottrell papers, 1896-1951.
- Frederick Haynes Newell papers, 1885-1931.
- Frederick Joseph Horne papers, 1893-1967.
- Frederick Joseph Libby papers, 1846-1973.
- Frederick Law Olmsted (Firm). Frederick Law Olmsted (Firm) records.
- Frederick Law Olmsted papers, 1777-1952.
- Frederick Rodgers papers, 1852-1920.
- Freedley, Vinton, 1891-1969. Vinton Freedley papers, 1865-1960.
- French, Daniel Chester, 1850-1931. Daniel Chester French papers, circa 1848-1968.
- Freud, Alexander, 1866-1943. Alexander Freud and Sophie Schreiber Freud papers, 1872-1965.
- Freud, Eva Mathilde, 1924-1944. Eva Mathilde Freud papers. 1924-1945.
- Freud, Henny Fuchs, 1892-1971. Oliver and Henny Fuchs Freud papers. 1821-1968.
- Freud, Oliver, 1891-1969. Oliver Freud and Henny Fuchs Freud papers, 1821-1993.
- Freud, Sigmund, 1856-1939. Sigmund Freud papers, circa 6th century BCE-1998 CE.
- Freud, Sophie Schreiber, 1878-approximately 1965. Alexander Freud and Sophie Schreiber Freud papers. 1872-1965.
- Frewen, Moreton, 1853-1924. Moreton Frewen papers, 1823-1934.
- Frewen, Richard, 1852-1896. Richard Frewen correspondence and journals. 1872-1876.
- Frey, John P. (John Philip), 1871-1957. John P. Frey papers, 1891-1951.
- Frič, Alberto Vojtěch, 1882-1944. Alberto Vojtěch Frič papers.
- Friedman, Harry T. Harry T. Friedman collection of Spanish American documents, circa 1500-1912.
- Friis, Harald T. (Harald Trap), 1893-1976. Harald T. Friis papers, 1921-1976.
- Friis, Herman R. (Herman Ralph), 1905-1989 Herman R. Friis cartographic manuals collection.
- Fritz Kreisler collection, 1845-1969.
- Fromuth, Charles Henry, 1861-1937. Charles Henry Fromuth papers, 1884-1937.
- Frost, Robert, 1874-1963. Untermeyer-Frost collection. 1913-1964.
- Fullam, William F. (William Freeland), 1855-1926. William F. Fullam papers, 1873-1942.
- Fuller, Melville Weston, 1833-1910. Melville Weston Fuller papers, 1794-1949.
- Fuller Sisters collection, 1880-1947.
- Fuller Sisters (Vocal group). Fuller Sisters collection, 1880-1947.
- Furer, Julius Augustus, 1880-1963. Julius Augustus Furer papers, 1910-1962.
- Furlong, William Rea, 1881-1976. William Rea Furlong map collection.
- Furlong, William Rea, 1881-1976. William Rea Furlong papers.
- Furman, Bess, 1894-1969. Bess Furman papers, 1728-1967.
- Furman, Lucile N., 1896-1961. Lucile N. Furman papers.
G
- G. Bromley Oxnam papers, 1823-1963.
- Gage, Lyman J. (Lyman Judson), 1836-1927. Lyman J. Gage correspondence, 1897-1906.
- Gallaudet, Edward Miner, 1837-1917. T.H. Gallaudet and Edward Miner Gallaudet papers. 1806-1958.
- Gallaudet, T. H. (Thomas Hopkins), 1787-1851. T.H. Gallaudet and Edward Miner Gallaudet papers, 1806-1958.
- The Gambia map collection, 1670-1965.
- Garfield, Abram, 1872- Abram Garfield papers.
- Garfield, Harry Augustus, 1863-1942. Harry Augustus Garfield papers, 1855-1961.
- Garfield, Helen Newell, 1866-1930. Helen Newell Garfield papers.
- Garfield, Irvin McDowell, 1870-1951 Irvin McDowell papers.
- Garfield, James A. (James Abram), 1831-1881. James A. Garfield papers.
- Garfield, James Rudolph, 1865-1950. James Rudolph Garfield papers, 1879-1950.
- Garfield, Lucretia Rudolph, 1832-1918. Lucretia Rudolph Garfield papers.
- Garfield, Lucretia Rudolph, 1832-1918. Lucretia Rudolph Garfield papers, 1807-1958.
- Garfinckel's (Department store). Garfinckel's Department Store records, 1919-1981.
- Garfinckel's Department Store records, 1919-1981.
- Garrett, Naomi Mills. Naomi Mills Garrett papers.
- Gary W. North map collection.
- Gatewood W. Dunston collection relating to William Surrey Hart, 1914-1955.
- Gathings, Joseph Royston, I, 1894-1978. Joseph Royston Gathings, I, collection, 1914-1936.
- Gatty, Harold, 1903-1957. Harold Gatty papers, 1901-1957.
- Gbur, Andrew, 1901-1997. Andrew Gbur collection, 1916-1992.
- General William Mitchell papers, 1888-1946.
- Georg Martin Wunderlich papers, 1897-1951.
- George and Böske Antheil papers, circa 1875-1984.
- George and Ira Gershwin collection, 1895-2008.
- George Antheil collection, 1875-1984.
- George Antheil collection, 1919-1931.
- George Antheil collection, 1921-1940.
- George Antheil correspondence to Stanley Hart, 1919-1931.
- George Antheil correspondence with Mary Louise Curtis Bok, 1921-1940.
- George B. Cortelyou papers, 1871-1948.
- George B. McClellan papers, 1838-1922.
- George Biddle papers, 1863-1973.
- George Creel papers, 1857-1953.
- George D. Murray papers, 1916-1956.
- George Dewey map collection.
- George Dewey papers, 1805-1949.
- George E. Belknap papers, 1857-1903.
- George F. Becker papers, 1814-1928.
- George Fort Milton papers, 1828-1985.
- George Foster Peabody papers, 1894-1937.
- George Frederick Kunz papers, 1783-1930.
- George H. Moss collection of sheet music, 1885-1935.
- George Hodges collection, circa 1790-circa 1909.
- George Kennan papers, 1840-1937.
- George Kleine papers, 1886-1946.
- George Korson collection, 1913-1975.
- George Korson folklore archive.
- George L. Tracy collection of music manuscripts, 1877-1920.
- George M. Gould collection of Hearniana, 1877-1931.
- George M. Gould papers.
- George Middleton papers, 1872-1970.
- George Milbry Gould papers.
- George Montfort Gilchrist family papers, 1854-1921.
- George Moss collection, 1885-1935.
- George P. Fisher papers, 1772-1905.
- George P. Merrill correspondence and autographs, 1803-1926.
- George P. Merrill papers.
- George Peabody Wetmore papers, 1885-1916.
- George Perkins Merrill papers.
- George Purnell Fisher papers.
- George S. Kaufman and Anne Kaufman Schneider papers, circa 1892-1998.
- George S. Kaufman collection, circa 1892-1998.
- George S. Kaufman papers, 1911-1941.
- George S. Patton papers, 1807-1979.
- George Sabin Gibbs map collection.
- George Sabin Gibbs papers, 1896-1947.
- George Sherwin Simonds papers, 1894-1937.
- George Simon Kaufman papers.
- George Sutherland papers, 1850-1944.
- George van Deurs papers, 1851-1982.
- George Van Horn Moseley papers, 1855-1960.
- George von Lengerke Meyer papers, 1900-1917.
- George W. Goethals papers, 1830-2014.
- George W. Norris papers, 1864-1954.
- George Washington Pearcy collection, 1915-1949.
- Georges F. Doriot papers, 1917-1985.
- Geraghty, Tom J. Tom J. Geraghty papers, 1923-1965.
- Geraldine Farrar collection, 1895-1943.
- Geraldine Farrar papers, 1895-1960s.
- German captured documents collection, 1766-1945.
- German national music collection, 1846-1974.
- Gershwin, George, 1898-1937. George and Ira Gershwin collection, 1895-2008.
- Gesell, Arnold, 1880-1961. Arnold Gesell papers, 1870-1971.
- Getty family. Gibson-Getty-McClure families papers, 1777-1926.
- Getty, George W. George W. Getty papers. 1847-1913.
- Ghent, William J. (William James), 1866-1942. William J. Ghent papers, 1876-1942.
- Gibbs, George Sabin, 1875-1947. George Sabin Gibbs map collection. (2)
- Gibbs, George Sabin, 1875-1947. George Sabin Gibbs papers.
- Gibbs, George Sabin, 1875-1947. George Sabin Gibbs papers, 1896-1947.
- Gibson family. Gibson-Getty-McClure families papers, 1777-1926.
- Gibson-Getty-McClure families papers, 1777-1926.
- Giffard, Henri, 1825-1882. Henri Giffard papers, 1852-1910.
- Gifford Pinchot papers, 1770-1972.
- Gilbert, Cass, 1859-1934. Cass Gilbert papers, 1841-1961.
- Gilbert, Cass, 1894- Cass Gilbert letterbooks. 1936-1941.
- Gilbert Jonas Company. Gilbert Jonas Company records. 1964-1995.
- Gilbert M. Hitchcock papers, 1910-1935.
- Gilbert Monell Hitchcock papers.
- Gilchrist family. George Montfort Gilchrist family papers, 1854-1921.
- Gilchrist, George Montfort. George Montfort Gilchrist family papers, 1854-1921.
- Gilchrist, Huntington, 1891-1975. Huntington Gilchrist papers, 1913-1973.
- Gish, Lillian, 1893-1993. Lillian Gish papers, 1829-1978.
- Gleason, Arthur, 1878-1923. Arthur Gleason papers, 1863-1931.
- Gleaves, Albert, 1858-1937. Albert Gleaves papers, 1803-1946.
- Glenn Dillard Gunn collection, 1874-1961.
- Glenn Dillard Gunn papers, 1802-1961.
- Glenn L. Martin papers, 1909-1956.
- Gloetzner, Anton. Anton Gloetzner music manuscripts, 1870-1920.
- Gluck, Alma, 1884-1938. Alma Gluck scrapbooks and other materials, 1902-1940.
- Goad, Charles E. Charles E. Goad fire insurance map collection, 1894-1909.
- Goathland, North Yorkshire, sword dance photograph collection, ca. 1912-1950.
- Godfrey, Edward Settle, 1843-1932. Edward Settle Godfrey diary. 1876.
- Godfrey, Edward Settle, 1843-1932. Edward Settle Godfrey papers, 1863-1933.
- Goebel, Julius, 1857-1931. Julius Goebel papers, 1873-1930.
- Goethals, George W. (George Washington), 1858-1928. George W. Goethals papers, 1830-2014.
- Goethals, Thomas R., Jr. Thomas R. Goethals Jr. papers.
- Gold, Julius, 1884-1969. Julius Gold collection, 1858-1964.
- Goldsberry collection of open-air school photographs.
- Goldsberry collection of photographs and periodical illustrations showing young children in "open air" and outdoor schools.
- Goldsberry, Louise Dunham. Goldsberry collection of open-air school photographs.
- Good, Barbara, active 1980-1993. Barbara Good papers.
- Goode, James M. James M. Goode collection.
- Goodell, William, 1792-1867. William Goodell papers, 1818-1917.
- Gordon, Robert Winslow. Robert Winslow Gordon papers, 1840-1961.
- Gorgas, Josiah, 1818-1883. Josiah Gorgas diary.
- Gorgas, William Crawford, 1854-1920. William Crawford Gorgas papers, 1857-1919.
- Gould, Alice Bache, 1868-1953. Alice Bache Gould papers.
- Gould, George M. (George Milbry), 1848-1922. George M. Gould collection of Hearniana, 1877-1931.
- Grace and Gustave Schirmer correspondence and other papers, 1845-1949.
- Grace Elizabeth Allen papers.
- Grace McCrea papers relating to Denishawn, 1913-1969.
- Graf, Rosa Freud, 1860-approximately 1942. Rosa Freud Graf papers, 1879-1942.
- Graham, Harold Benjamin, 1899-1948 Harold Benjamin Graham collection 1917-2012.
- Grainger, Percy, 1882-1961. Reproductions of selected Percy Grainger papers, 1909-1952.
- Grant Richards collection of A.E. Housman material, 1898-1947.
- Greely, A. W. (Adolphus Washington), 1844-1935. A.W. Greely papers, 1753-1997.
- Greely, Henrietta Hudson Cruger Nesmith. Henrietta Hudson Cruger Nesmith Greely papers. 1878-1918.
- Green-Driver collection, 1896-1969.
- Green, John Benjamin, -1934. John Benjamin Green papers.
- Greene, Frank L. (Frank Lester), 1870-1930. Frank L. Greene papers, 1895-1930.
- Greene, Paulette. Paulette Greene papers, 1920-1998.
- Greenewalt, Mary Elizabeth Hallock, 1871-1950. Mary Elizabeth Hallock Greenewalt papers, 1918-1942.
- Greenslade, John Wills, 1880-1950. John Wills Greenslade correspondence transcripts, 1900-2010.
- Greenslade, John Wills, 1880-1950. John Wills Greenslade papers, 1847-1961.
- Gregg, Morris E. Morris E. Gregg papers.
- Gregory, Thomas Watt, 1861-1933. Thomas Watt Gregory papers, 1896-1933.
- Grentzer, Rose Marie. Rose Marie Grentzer and Harold Spivacke Fund collection, 1615-1994.
- Gresham, Pattie, 1882-1960. Green-Driver collection, 1896-1969.
- Gresham, Pattie, 1882-1960. Pattie Gresham papers.
- Grey, Zane, 1872-1939. Zane Grey papers, 1912-1939.
- Grigorʹev, S. L. (Sergeĭ Leonidovich), 1883-1968. Diaghilev ballet, 1909-1929.
- Grigorʹev, S. L. (Sergeĭ Leonidovich), 1883-1968. Serge Grigoriev / Ballets Russes archive, 1909-2009.
- Griscom, Lloyd Carpenter, 1872-1959. Lloyd Carpenter Griscom papers, 1898-1951.
- Grofé, Ferde, 1892-1972. Ferde Grofé collection, 1890-1960.
- Grosvenor, Edwin A. (Edwin Augustus), 1845-1936. Edwin A. Grosvenor papers.
- Grosvenor, Edwin Prescott, 1875-1930. Edwin Prescott Grosvenor papers.
- Grosvenor, Elsie May, 1878-1964. Elsie May Grosvenor papers.
- Grosvenor family. Grosvenor family papers, 1827-1981.
- Grosvenor family papers, 1827-1981.
- Grosvenor, Gilbert Hovey, 1875-1966. Gilbert Hovey Grosvenor papers.
- Grosvenor, Lilian Waters, 1852-1931. Lilian Waters Grosvenor papers.
- Grosvenor, Melville Bell, 1901-1982. Melville Bell Grosvenor papers.
- Grover Cleveland Loening papers, 1900-1975.
- Grover Cleveland papers, 1743-1945.
- Gruenberg, Benjamin C. (Benjamin Charles), 1875-1965. Benjamin C. Gruenberg and Sidonie Matsner Gruenberg papers, 1878-1972.
- Gruenberg, Sidonie Matsner, 1881-1974. Benjamin C. Gruenberg and Sidonie Matsner Gruenberg papers. 1878-1972.
- Guinea-Bissau map collection, 1827-1969.
- Guiney, Louise Imogen, 1861-1920. Louise Imogen Guiney papers, 1884-1920.
- Gunn, Glenn Dillard, 1874-1963. Glenn Dillard Gunn papers, 1802-1961.
- Gunther Schuller papers, 1615-2014.
- Gustave Percival Wiksell papers, 1855-1939.
- Gustave Schirmer-Fay collection.
- Gutzon Borglum papers, 1881-2019.
H
- Hack, Charles W. Charles W. Hack papers, circa 1800-1926.
- Hadley, Lucia Hanna. Lucia Hanna Hadley papers.
- Hagedorn, Hermann, 1882-1964. Hermann Hagedorn papers, 1912-1933.
- Hale, Edward Everett, 1822-1909. Edward Everett Hale papers.
- Hale family. Hale family papers, 1698-1916.
- Hale family papers, 1698-1916.
- Hale, Nathan, 1784-1863. Nathan Hale papers.
- Halford, Elijah Walker, 1843-1938. Elijah Walker Halford papers, 1848-1938.
- Hall, Asaph, III, 1829-1907. Asaph Hall, III, papers.
- Hall, Asaph, III, 1829-1907. Asaph Hall papers, 1837-1998.
- Hall, Asaph, IV, 1859-1930. Asaph Hall, IV, papers.
- Hall Johnson collection, 1925-1970.
- Hall Johnson papers, 1913-1980.
- Halsted B. VanderPoel literary collection, 1815-1929.
- Ham, Connelly, Parks, and Snodgrass families papers, 1870-2018.
- Ham family. Ham, Connelly, Parks, and Snodgrass families papers, 1870-2018.
- Ham family papers.
- Hambitzer, Charles, -1918. Charles Hambitzer music manuscripts, circa 1910-1918.
- Hamlin, Anna, -1925. Anna Hamlin papers.
- Hamlin, Charles S. (Charles Sumner), 1861-1938. Charles S. Hamlin papers, 1869-1968.
- Hamlin, Huybertie Pruyn, 1873-1964. Huybertie Pruyn Hamlin papers.
- Hammer, Armand, 1898-1990. Armand Hammer papers, circa 1508-1989.
- Hammerstein, Oscar, II, 1895-1960. Oscar Hammerstein II collection, 1847-2000.
- Hammond Incorporated. Hammond World Atlas Corporation archive of print records and samples of printing methods.
- Hammond, John Hays, 1888-1965. John Hays Hammond papers, 1908-1965.
- Hammond Reed Company correspondence, 1905-1913.
- Hammond Reed Company. Hammond Reed Company correspondence, 1905-1913.
- Hammond World Atlas Corporation archive of print records and samples of printing methods.
- Hampton family. Wade Hampton family papers, 1855-1935.
- Hampton, Vernon Boyce, 1897-1985. Vernon Boyce Hampton papers, 1872-1971.
- Hampton, Wade, 1818-1902. Wade Hampton family papers, 1855-1935.
- Hand, Catharine Worthington Fowler, 1801-1865. Catharine Worthington Fowler Hand papers.
- Hand family. John Aldrich Stephenson collection of the Hand, Fiske, and Aldrich families papers. 1745-1966.
- Hand family papers.
- Hand, Joseph Winborn, 1792-1844. Joseph Winborn Hand papers.
- Hand, Learned, 1872-1961. Learned Hand trial summaries, 1909-1924.
- Hanna family. Hanna-McCormick family papers, 1792-1985.
- Hanna, Marcus Alonzo, 1837-1904. Marcus Alonzo Hanna papers.
- Hanna-McCormick family papers, 1792-1985.
- Hannah G. Solomon papers, 1817-1986.
- Hans Hermann Carl Ludwig, Graf von Berlepsch, correspondence, 1874-1913.
- Hans Hermann Carl Ludwig, Graf von Berlepsch, papers.
- Hans Spialek papers, 1895-1984.
- Hanson Weightman Baldwin papers, 1920-1978.
- Hapgood, Elizabeth Reynolds. Norman Hapgood and Elizabeth Reynolds Hapgood papers. 1824-1977.
- Hapgood, Norman, 1868-1937. Norman Hapgood and Elizabeth Reynolds Hapgood papers, 1824-1977.
- Harald T. Friis papers, 1921-1976.
- Harbord, James G. (James Guthrie), 1866-1947. James G. Harbord papers, 1886-1938.
- Harding, Fann. Fann Harding papers.
- Harding, T. Swann (Thomas Swann), 1890- T. Swann Harding papers, 1918-1963.
- Harding, Warren G. (Warren Gamaliel), 1865-1923. Warren G. Harding-Carrie Fulton Phillips correspondence, 1910-1924.
- Harding, Warren G. (Warren Gamaliel), 1865-1923. Warren G. Harding papers, 1908-1926.
- Hardy, D. Heywood (Dermot Heywood), 1893-1982. D. Heywood Hardy papers, 1913-1924.
- Harlan, James, 1800-1863. James Harlan papers. 1810-1863.
- Harlan, John Marshall, 1833-1911. John Marshall Harlan papers, 1810-1971.
- Harold Bauer collection, 1886-1951.
- Harold Benjamin Graham collection 1917-2012.
- Harold Gatty papers, 1901-1957.
- Harold Raymond Wayne Benjamin papers, 1908-1972.
- Harriet Hoctor collection, 1868-1977.
- Harriman, Florence Jaffray, 1870-1967. Florence Jaffray Harriman papers, 1857-1982.
- Harriman, Jarvis. Jarvis Harriman papers. 1964-1965.
- Harriman, W. Averell (William Averell), 1891-1986. W. Averell Harriman papers, 1869-2001.
- Harrington, Page, 1967- Page Harrington papers.
- Harrington Putnam papers, 1909-1928.
- Harriot Stanton Blatch papers, 1907-1915.
- Harris, William Torrey, 1835-1909. William Torrey Harris papers, 1865-1908.
- Harrison, Benjamin, 1833-1901. Benjamin Harrison papers, 1780-1948.
- Harrison, Burton, Mrs., 1843-1920. Mrs. Burton Harrison papers.
- Harrison, Burton Norvell, 1838-1904. Burton Norvell Harrison family papers, 1812-1926.
- Harrison, Fairfax, 1869-1938. Fairfax Harrison papers.
- Harrison family. Burton Norvell Harrison family papers, 1812-1926.
- Harrison, Francis Burton, 1873-1957. Francis Burton Harrison papers.
- Harrison Grey Fiske papers.
- Harrison, J. B. (Jesse Burton), 1805-1841. J.B. Harrison papers.
- Harrison, Leland, 1883-1951. Leland Harrison papers, 1915-1947.
- Harrison, Richard Edes. Richard Edes Harrison maps and papers collection.
- Harrison, Samuel Jordan, 1771-1846. Samuel Jordan Harrison papers.
- Harry and Sara Lepman collection, 1890-1945.
- Harry Augustus Garfield papers, 1855-1961.
- Harry C. Oberholser papers, 1856-1960.
- Harry N. Sargent papers, 1917-1920.
- Harry Payne Whitney collection of letters of William Collins Whitney, 1757-1942.
- Harry S. Cummings papers, 1890-1986.
- Harry T. Friedman collection of Spanish American documents, circa 1500-1912.
- Harry T. Friedman papers.
- Harry Von Tilzer and H. Harold Gumm papers, 1878-1959.
- Harry W. Frantz map collection, 1922-1950.
- Hart, Ira. Ira Hart sermon notes.
- Hart, Stanley. George Antheil correspondence to Stanley Hart. 1919-1931.
- Hart, William S. (William Surrey), 1864-1946. Gatewood W. Dunston collection relating to William S. Hart. 1914-1955.
- Hartt, Charles Frederick, 1840-1878. Charles Frederick Hartt papers.
- Harvey Washington Wiley papers, 1854-1954.
- Harvey, Winfield S. Winfield S. Harvey diary. 1868-1871.
- Hasse, Adelaide R. (Adelaide Rosalia), 1868-1953. Adelaide Rosalia Hasse papers, 1862-1951.
- Hasson, Esther Voorhees, 1867-1942. Esther Voorhees Hasson journal. 1899.
- Haupt, Herman, 1817-1905. Herman Haupt letterbook. 1861-1863.
- Haupt, Lewis M. (Lewis Muhlenberg), 1844-1937. Lewis M. Haupt papers, 1849-1923.
- Hawley, Joseph R. (Joseph Roswell), 1826-1905. Joseph R. Hawley papers, 1638-1906.
- Hay, Clara Louise Stone, 1849-1914 Clara Louise Stone Hay correspondence. 1882-1914.
- Hay, Eugene Gano, 1853-1933. Eugene Gano Hay papers, 1770-1933.
- Hay, John, 1838-1905. John Hay papers, 1783-1999.
- Hay, John, 1838-1905. John Hay papers. 1861-1959.
- Hayden, Alfred, 1894- Alfred Hayden papers.
- Hayden, Edward Everett, 1858-1932. Edward Everett Hayden family papers, 1817-1963.
- Hayden family. Edward Everett Hayden family papers, 1817-1963.
- Hayden, Herbert B. (Herbert Bainbridge), 1885-1969. Herbert B. Hayden papers.
- Hayden, Mary Bainbridge, 1895- Mary Bainbridge Hayden papers.
- Hayden, Reynolds, 1883- Reynolds Hayden papers.
- Hayden, William, 1795-1880. William Hayden papers.
- Hayes, Barbara Monteath Kelman, 1893-1975. Barbara Monteath Kelman Hayes papers.
- Hayes, David, 1832-1865. David Hayes papers.
- Hayes family. Hayes, Hollister, and Kelman families papers, 1826-2012.
- Hayes family papers.
- Hayes, Hammond Vinton, 1860-1947. Hammond Vinton Hayes papers.
- Hayes, Hollister, and Kelman families papers, 1826-2012.
- Hayes, John David, 1888-1957. John David Hayes papers.
- Hayes, Margaret Young, 1857-1949. Margaret Young Hayes papers.
- Hayes, W. M. (Watson M.), 1857-1944. W.M. Hayes papers.
- Hearn, Lafcadio, 1850-1904. George M. Gould collection of Hearniana. 1877-1931.
- Heath, Perry S. (Perry Sanford), 1857-1927. Perry S. Heath papers, 1890-1983.
- Heaton architectural drawing archive (Library of Congress).
- Heaton archive.
- Heaton, Arthur B., 1875-1951. Heaton architectural drawing archive (Library of Congress).
- Heaton collection.
- Heezen-Tharp collection.
- Heifetz collection, 1802-1987.
- Heifetz, Jascha, 1901-1987. Jascha Heifetz papers, 1786-1991.
- Heilbronner, Raoul. Raoul Heilbronner papers, 1887-1952.
- Helen Hopekirk collection, 1875-1954.
- Helen Keller papers, 1842-1954.
- Helen Merrell Lynd papers.
- Helm, Edith Benham, 1874-1962. Edith Benham Helm papers, 1915-1961.
- Henderson, James Houston, 1878-1935. James Houston Henderson papers, 1913-1920.
- Hendrik Christian Andersen papers, 1844-1940.
- Henny Fuchs Freud papers.
- Henri Giffard papers, 1852-1910.
- Henry Albert Monday collection relating to Mexico, 1522-1935.
- Henry Barrett Learned papers, 1907-1931.
- Henry Clark Corbin papers, 1864-1980.
- Henry Cowell music manuscripts, 1909-1965.
- Henry Croskey Mustin papers, 1886-1924.
- Henry D. Flood papers, 1870-1921.
- Henry Donch performance library, 1811-1928.
- Henry Ives diaries, 1857-1914.
- Henry Ives papers.
- Henry Justin Allen papers, 1896-1942.
- Henry L. Dawes papers, 1833-1933.
- Henry M. Robert papers, 1853-1937.
- Henry Morgenthau papers, 1795-1941.
- Henry Northrup Castle family papers, 1394-1920.
- Henry P. Joslyn music manuscripts, 1912-1971.
- Henry Prather Fletcher papers, 1898-1958.
- Henry S. Pritchett papers, 1876-1967.
- Henry Sapoznik collection, circa 1920-1960.
- Henry T. Allen papers, 1806-1933.
- Henry T. Mayo papers, 1866-1972.
- Henry Thomas Rainey papers, 1904-1934.
- Henry Ware Lawton papers, 1849-1930.
- Henry Watterson papers, 1863-1920.
- Henry White papers, 1812-1931.
- Henry William Parsons papers, 1871-1986.
- Herbert Benjamin papers, 1915-2004.
- Herbert Corey papers, 1847-1954.
- Herbert E. French photograph collection.
- Herbert Eugene Ives papers.
- Herbert Putnam papers, 1783-1958.
- Herbert, Victor, 1859-1924. Victor Herbert collection, 1880-1939.
- Herman Hollerith papers, 1850-1982.
- Herman R. Friis cartographic manuals collection.
- Hermann Hagedorn papers, 1912-1933.
- Herndon-Weik collection of Lincolniana, circa 1824-1933.
- Herndon, William Henry, 1818-1891. William Henry Herndon papers. 1849-1891.
- Herscher, Lou (Louis), 1894-1974. Lou Herscher music manuscripts, 1896-1968.
- Hilary Pollard Jones papers, 1889-1937.
- Hildebrandt, A. (Alfred), 1870-1949. A. Hildebrandt papers, 1826-1943.
- Hileman, Grace. Grace Hileman correspondence. 1923-1936.
- Hill, John Philip, 1879-1941. John Philip Hill scrapbooks, 1906-1938.
- Hillard, Harriet Low, 1809-1877. Harriet Low Hillard papers.
- Hillcrest Children's Center (Washington, D.C.). Hillcrest Children's Center (Washington, D.C.) records, 1815-1966.
- Hillcrest Children's Center (Washington, D.C.). Hillcrest Children's Center (Washington, D.C.) records. 1953-1966.
- Hillcrest Children's Center (Washington, D.C.) records, 1815-1966.
- Hillcrest Children's Village (Washington, D.C.) Hillcrest Children's Village (Washington, D.C.) records. 1927-1953.
- Hilsberg, Leon, 1887-1957. Leon Hilsberg collection, 1906-1941.
- Himmler, Heinrich, 1900-1945. Himmler Files.
- Hines, John Leonard, 1868-1968. John Leonard Hines map collection. (2)
- Hines, John Leonard, 1868-1968. John Leonard Hines papers.
- Hines, John Leonard, 1868-1968. John Leonard Hines papers, 1881-1944.
- Hitchcock, Gilbert M. (Gilbert Monell), 1859-1934. Gilbert M. Hitchcock papers, 1910-1935.
- Hitt, Robert R. (Robert Roberts), 1834-1906. Robert R. Hitt papers, 1830-1906.
- Hobson, Richmond Pearson, 1870-1937. Richmond Pearson Hobson papers, 1889-1966.
- Hoctor, Harriet. Harriet Hoctor collection, 1868-1977.
- Hodges collection, circa 1790-circa 1909.
- Hodges family collection, circa 1790-circa 1909.
- Hodges family. Hodges family collection, circa 1790-circa 1909.
- Hoes, Roswell Randall, 1850-1921. Roswell Randall Hoes papers, 1799-1912.
- Holden Chester Richardson papers, 1844-1946.
- Hollerith, Herman, 1860-1929. Herman Hollerith papers, 1850-1982.
- Hollister family. Hayes, Hollister, and Kelman families papers, 1826-2012.
- Hollister family papers.
- Hollister, Margaret Hayes, 1917- Margaret Hayes Hollister papers.
- Holmes, Oliver Wendell, 1809-1894. Oliver Wendell Holmes papers, 1837-1931.
- Holmes, Oliver Wendell, Jr., 1841-1935. Manuscript holdings from the Library of Oliver Wendell Holmes, Jr. : ca. 1450-1935.
- Homes and haunts of notable Americans.
- Hooper, Stanford Caldwell, 1884-1955. Stanford Caldwell Hooper papers, 1899-1955.
- Hoover, Irwin Hood, 1871-1933. Irwin Hood Hoover papers, 1909-1933.
- Hopekirk, Helen. Helen Hopekirk collection, 1875-1954.
- Hopkins, Charlotte Everett. Charlotte Everett Hopkins collection of National Civic Federation. Woman's Department. District of Columbia Section records, 1900-1926.
- Hopkins, Cornelia Lee, 1780-1815. Cornelia Lee Hopkins papers.
- Horace Callaway Carlisle papers.
- Horace Callaway Carlisle poems, 1900-1956.
- Horace H. Lurton papers, 1860-1915.
- Horace Harmon Lurton papers.
- Horace Porter papers, 1853-1922.
- Horace Traubel and Anne Montgomerie Traubel papers, 1824-1979.
- Horace Traubel papers.
- Hornaday, William T. (William Temple), 1854-1937. William T. Hornaday papers, 1866-1975.
- Hornak family album.
- Horne, Frederick Joseph, 1880-1959. Frederick Joseph Horne papers, 1893-1967.
- Horner, Frederick Cecil, 1887-1974. Frederick Cecil Horner papers, 1917-1960.
- Horner, Mabel Carlton, 1872-1961. Mabel Carlton Horner biography of Caleb Henry Carlton.
- Hostos, Eugenio Carlos de, 1879-1959. Eugenio María de Hostos and Eugenio Carlos de Hostos papers. 1865-1990.
- Hostos, Eugenio María de, 1839-1903. Eugenio María de Hostos and Eugenio Carlos de Hostos papers. 1865-1990.
- Housman, A. E. (Alfred Edward), 1859-1936. A.E. Housman papers, 1906-1940.
- Houston, Charles Hamilton, 1895-1950. Charles Hamilton Houston papers. 1871-1935.
- Houston family. William LePre Houston family papers, 1777-1936.
- Houston, William LePre. William LePre Houston family papers, 1777-1936.
- Howard Elbridge Robbins collection 1918.
- Howard family. Howard-von Recum family papers, 1869-1972.
- Howard family papers.
- Howard, Henry, Sir, 1843-1921. Howard-von Recum family papers, 1869-1972.
- Howard, Jack R. (Jack Rohe), 1910- Jack R. Howard papers.
- Howard, Roy Wilson, 1883-1964. Roy Wilson Howard papers, 1911-1966.
- Howard-von Recum family papers, 1869-1972.
- Howe, Julia Ward, 1819-1910. Julia Ward Howe papers, 1845-1917.
- Hoxie, R. L. (Richard Leveridge), 1844-1930. Vinnie Ream and R.L. Hoxie papers. 1853-1937.
- Hubbard, Gardiner G. (Gardiner Greene), 1822-1897. Gardiner G. Hubbard papers.
- Hubbell, Julian B. (Julian Bertine), 1847-1929. Julian B. Hubbell papers.
- Huebsch, B. W. (Benjamin W.), 1876-1964. B.W. Huebsch papers, 1893-1964.
- Hugh Lenox Scott papers, 1582-1981.
- Hughes, Charles Evans, 1862-1948. Charles Evans Hughes papers, 1836-1950.
- Hughes, David Charles, 1832-1909. David Charles Hughes papers.
- Hughes, Everett Strait, 1885-1957. Everett Strait Hughes map collection. (2)
- Hughes, Everett Strait, 1885-1957. Everett Strait Hughes papers.
- Hughes, Everett Strait, 1885-1957. Everett Strait Hughes papers, 1903-1975.
- Hughes, Robert Patterson, 1839-1909. Robert Patterson Hughes papers, 1876-1994.
- Hugo Kortschak correspondence and photographs, 1904-1950.
- Hugo Leichtentritt papers, 1888-1972.
- Hull, Anne. Anne Hull papers, 1894-1981.
- Hulsizer family. Hulsizer family papers, 1915-1941.
- Hulsizer family papers, 1915-1941.
- Humphrey, William E. (William Ewart), 1862-1934. William E. Humphrey papers, 1903-1936.
- Hunsberger, George S., 1914- George S. Hunsberger papers.
- Huntington Gilchrist papers, 1913-1973.
- Hurn, William, Jr., 1894-1925. William Hurn, Jr., collection 1917-2014.
- Hyde, Dorsey William, 1888-1955. Dorsey William Hyde papers, 1757-1955.
I
- Ickes, Harold L. (Harold LeClair), 1874-1952. Harold L. Ickes papers.
- Idah S. Pratt Foster papers, 1912-1967.
- Ince, Thomas H. Thomas H. Ince papers, 1913-1964.
- Ingersoll, Royal E. (Royal Eason), 1883-1976. Royal Rodney Ingersoll and Royal E. Ingersoll papers. 1884-1931.
- Ingersoll, Royal Rodney, 1847-1931. Royal Rodney Ingersoll and Royal E. Ingersoll papers, 1866-1935.
- Initiatives of Change (Organization). Initiatives of Change records. (2)
- Inman, Samuel Guy, 1877-1965. Samuel Guy Inman papers, 1901-1965.
- Institute for Intercultural Studies. Institute for Intercultural Studies records.
- Institute of the Aerospace Sciences archives, 1783-1962.
- Institute of the Aerospace Sciences. Institute of the Aerospace Sciences archives.
- Instytut mystet︠s︡tvoznavstva, folʹkloru ta etnohrafiï im. M.T. Rylʹsʹkoho. Rylʹsʹkyĭ Institute Ukrainian cylinder collection, 1908-1930s.
- Irene Aloha Wright papers, 1620-1977.
- Irita Van Doren papers, 1920-1967.
- Irvine Luther Lenroot papers, 1858-1971.
- Irving Berlin collection, 1895-1990.
- Irving Langmuir papers, 1871-1957.
- Irwin Hood Hoover papers, 1909-1933.
- Isabel Gordon Carter collection, 1921-1942.
- Isabelle Sayers papers, circa 1886-1980.
- Isakower, Otto, 1899-1972. Otto Isakower and Salomea Isakower papers, 1880-1975.
- Isakower, Salomea, 1888- Otto Isakower and Salomea Isakower papers. 1880-1975.
- Israel Perlstein collection relating to Imperial Russia, 1613-1914.
- Isthmian Canal Commission (U.S.) Isthmian Canal Commission (U.S.) records. (2)
- Ives, Frederic Eugene, 1856-1937. Frederic Eugene Ives and Herbert Eugene Ives papers, 1869-1957.
- Ives, Henry, 1830- Henry Ives diaries, 1857-1914.
- Ives, Herbert Eugene, 1882-1953. Frederic Eugene Ives and Herbert Eugene Ives papers. 1869-1957.
- Izard, Elizabeth C. (Elizabeth Carter), approximately 1774-1826. Elizabeth C. Izard papers.
J
- J. Franklin Jameson papers, 1604-1994.
- J. Laurence Laughlin papers, 1902-1931.
- J. Thomas Schneider map collection.
- J. Thomas Schneider papers, 1915-1960.
- Jack Butterworth collection of silent film cues, 1917-1929.
- Jack, Cerise C. Cerise C. Jack papers relating to the Sacco and Vanzetti case, circa 1921-1999.
- Jacob A. Riis papers, 1870-1990.
- Jacobi, Mary Putnam, 1842-1906. Mary Putnam Jacobi correspondence.
- Jacobo Ficher collection, 1864-1997.
- Jacobs-Bond, Carrie, 1862-1946. Carrie Jacobs-Bond collection, circa 1896-circa 1944.
- Jacobs-Bond collection, circa 1896-circa 1944.
- Jacobson, Edith. Edith Jacobson papers, 1922-1977.
- Jacques Loeb papers, 1889-1924.
- James A. Farley papers, 1790-1976.
- James Alexander Robertson papers, 1816-1939.
- James Couzens papers, 1903-1940.
- James Dodson Barbee and David Rankin Barbee papers, 1784-1953.
- James G. Harbord papers, 1886-1938.
- James Harrison Wilson papers, circa 1862-1923.
- James, Henry, 1879-1947. Henry James research files.
- James Houston Henderson papers, 1913-1920.
- James J. Davis papers, 1895-1946.
- James M. Goode collection.
- James McKeen Cattell papers, 1835-1948.
- James McNeill Whistler papers.
- James R. Mann papers, 1887-1922.
- James Rudolph Garfield papers, 1879-1950.
- James Wadsworth family papers, 1730-1959.
- James Whitcomb Riley papers, 1883-1915.
- Jameson, J. Franklin (John Franklin), 1859-1937. J. Franklin Jameson papers, 1604-1994.
- Jardine, William Marion, 1879-1955. William Marion Jardine papers, 1908-1955.
- Jascha Heifetz collection, 1802-1987.
- Jascha Heifetz papers, 1786-1991.
- J.B. Lippincott & Co. J.B. Lippincott & Co. records.
- J.C. Bancroft Davis papers, 1849-1902.
- Jean Ritchie and George Pickow collection, 1923-2015.
- Jeannette Thurber Connor collection of Floridiana, 1570-1927.
- Jefferson Davis papers, 1795-1913.
- Jefferson Patterson papers, 1824-1981.
- Jelliffe, Helena Dewey Leeming, -1916. Correspondence and diary.
- Jelliffe, Smith Ely, 1866-1945. Smith Ely Jelliffe papers, 1882-1977.
- Jennie Lorenz collection relating to Charlotte Cushman, 1830-1960.
- Jennie Lorenz papers.
- Jerauld Wright papers, 1853-1960.
- Jerome Kern collection, 1905-1951.
- Jesup, Thomas Sidney, 1788-1860. Thomas Sidney Jesup papers, 1780-1907.
- J.G. Randall and Ruth Painter Randall papers, 1779-1970.
- J.G. Randall papers.
- Jim Walsh papers, 1867-1987, and undated.
- Jiménez, Juan Ramón, 1881-1958. Juan Ramón Jiménez papers, 1901-1954.
- J.L.M. Curry papers, 1637-1939.
- Jo Davidson papers, 1906-1952.
- Joel Thompson Boone papers, 1755-1971.
- John Adams Kingsbury papers, 1841-1966.
- John Alden Carpenter collection, 1891-1961.
- John Aldrich Stephenson collection of the Hand, Fiske, and Aldrich families papers, 1745-1966.
- John Alexander Logan family papers, 1836-1925.
- John Archer Lejeune papers, 1815-1950.
- John Austin Moon papers, 1832-1921.
- John Barrett papers, 1861-1943.
- John Bassett Moore papers, 1866-1949.
- John Bigelow papers, 1492-1936.
- John Burroughs papers.
- John C. Merriam papers, 1899-1938.
- John C. Spooner papers, 1855-1909.
- John Callan O'Laughlin papers, 1895-1949.
- John Calvin Leonard papers, 1882-1920.
- John Carroll Parent, Sr., collection 1907-2015.
- John Crittenden Watson papers, 1844-1960.
- John D. Whiting papers, 1890-1970.
- John Davis Batchelder collection of manuscripts, 1537-1944.
- John Davis Batchelder ephemera and special collections, 2200 BCE-1948.
- John Edward Erickson papers.
- John Forsyth Meigs papers, 1914-1940.
- John G. Nicolay papers, 1811-1943.
- John H. Towers papers, 1830-1989.
- John Hay papers.
- John Hay papers, 1783-1999.
- John Hays Hammond papers, 1908-1965.
- John J. Pershing papers, 1882-1971.
- John James Beckley family papers, 1789-1918.
- John Kieran papers, 1917-1985.
- John L. McCrea papers, 1898-1984.
- John L. McCrea papers (Naval Historical Foundation collection).
- John Lansing Callan papers, 1907-1956.
- John Leonard Hines map collection.
- John Leonard Hines papers, 1881-1944.
- John Marshall Harlan papers, 1810-1971.
- John McAuley Palmer papers, 1863-1977.
- John McGlinn collection, 1890s-2010.
- John McRae Kennelly collection 1917-1919.
- John Merven Carrère papers, 1894-1911.
- John P. Frey papers, 1891-1951.
- John Philip Hill papers.
- John Philip Hill scrapbooks, 1906-1938.
- John Philip Sousa collection 1849-2004.
- John Pierce Langs papers, 1896-2001.
- John Purroy Mitchel papers, 1835-1932.
- John Robert Procter papers, 1867-1903.
- John Sharp Williams papers, 1902-1924.
- John Spalding Flannery papers, 1902-1953.
- John Spencer Bassett papers, 1770-1978.
- John Thomas Schneider papers.
- John Tyler Morgan papers, 1840-1907.
- John Tyler papers, 1691-1918.
- John Vance Cheney papers, 1847-1927.
- John W. Colbert papers, 1895-1966.
- John William "Blind" Boone music, ca. 1907-1918.
- John William Colbert papers.
- John Wills Greenslade correspondence transcripts, 1900-2010.
- John Wills Greenslade papers.
- John Wills Greenslade papers, 1847-1961.
- Johnson, Adelaide, 1859-1955. Adelaide Johnson papers, 1873-1947.
- Johnson, Eric. Eric Johnson collection of Ernest Bloch photographs, 1896-2008.
- Johnson, Hall, 1888-1970. Hall Johnson papers, 1913-1980.
- Johnson, Nelson T. (Nelson Trusler), 1887-1954. Nelson T. Johnson papers, 1916-1955.
- Johnston, Frances Benjamin, 1864-1952. Frances Benjamin Johnston papers, 1855-1956.
- Johnston, Frances Benjamin, 1864-1952. Frances Benjamin Johnston photograph collection (Library of Congress).
- Johnston, Frances Benjamin, 1864-1952. Papers of Frances Benjamin Johnston.
- Johnston, John, 1852-1927. John Johnston papers.
- Johnston, Mercer Green, 1868-1954. Mercer Green Johnston papers, 1860-1954.
- Johnston photograph collection.
- Johnston, William Dawson, 1871-1928. William Dawson Johnston papers, 1842-1927.
- Jones, Hilary Pollard, 1863-1938. Hilary Pollard Jones papers, 1889-1937.
- Jordan family papers.
- Jordan, Nelson W., 1842-1922. Nelson W. Jordan family papers, circa 1864-2003.
- José Ignacio Rodríguez papers, 1860-1907.
- Josef Breuer papers, 1859-1970.
- Joseph Arthur Moore papers, 1910-1927.
- Joseph Benson Foraker papers, 1884-1916.
- Joseph Edward Davies papers, 1860-1958.
- Joseph Hodges Choate papers, 1745-1929.
- Joseph J. Roberts family papers, 1839-2001.
- Joseph Jenkins Roberts family papers.
- Joseph P. Tumulty papers, 1898-1969.
- Joseph Pennell papers.
- Joseph Pulitzer papers, 1880-1924.
- Joseph R. Hawley papers, 1638-1906.
- Joseph Royston Gathings, I, collection, 1914-1936.
- Joseph Sanford Wade papers, 1898-1955.
- Joseph Smith Fowler papers, 1863-1903.
- Joseph Strauss papers, 1884-1949.
- Joseph Warren Beach papers, 1891-1955.
- Josephus Daniels papers, 1829-1948.
- Joshua Lawrence Chamberlain papers, 1775-1913.
- Joslyn, Henry P., 1884-1931. Henry P. Joslyn music manuscripts, 1912-1971.
- Juan Ramón Jiménez papers, 1901-1954.
- Jubal Anderson Early papers, 1829-1930.
- Judson King papers, 1900-1959.
- Julia Ward Howe papers, 1845-1917.
- Julius Augustus Furer papers, 1910-1962.
- Julius Goebel papers, 1873-1930.
- Julius Gold collection, 1858-1964.
- Junta (New York, N.Y.) Junta (New York, N.Y.) records. 1868-1870.
- Justin G. Turner autograph collection, 1763-1968.
K
- Kantor, Effie McKinlay, 1879-1931. Effie McKinlay Kantor papers.
- Kantor, Irene Layne, 1905-1982. Irene Layne Kantor papers.
- Kantor, MacKinlay, 1904-1977. MacKinlay Kantor papers, 1885-1998.
- Karl Abraham papers, 1908-1925.
- Karl Bender World War II German military intelligence map collection.
- Katharine Amend Kellock papers, 1924-1969.
- Katharine McCook Knox papers, 1802-1975.
- Katherine Dunham collection, 1920-2006.
- Kaufman, George S. (George Simon), 1889-1961. George S. Kaufman and Anne Kaufman Schneider papers, circa 1892-1998.
- Kaufman, George S. (George Simon), 1889-1961. George S. Kaufman papers, 1911-1941.
- Keene, Francis Bowler, 1856-1945. Francis Bowler Keene papers, 1856-1975.
- Keidel family. Keidel family papers, 1821-1937.
- Keidel family papers, 1821-1937.
- Keidel, George C. (George Charles), 1868-1942. George C. Keidel papers. 1821-1934.
- Keller, Helen, 1880-1968. Helen Keller papers, 1842-1954.
- Kellinger, Cesi, 1922-2014. Cesi Kellinger collection of dance materials, 1842-1994.
- Kellock, Harold, 1879-1953. Harold Kellock papers. 1929.
- Kellock, Katharine Amend, 1892-1984. Katharine Amend Kellock papers, 1924-1969.
- Kellogg, Edward Nealy, 1841-1874. Edward Nealy Kellogg and Edward Stanley Kellogg papers, 1858-1937.
- Kellogg, Edward Stanley, 1870-1948. Edward Nealy Kellogg and Edward Stanley Kellogg papers. 1858-1937.
- Kelman family. Hayes, Hollister, and Kelman families papers, 1826-2012.
- Kelman family papers.
- Kelman, John, 1864-1929. John Kelman papers.
- Ken McCormick collection of Doubleday and Company, inc., records, 1882-1992.
- Kendrick-Brooks family papers, 1831-2000.
- Kendrick family. Kendrick-Brooks family papers, 1831-2000.
- Kendrick, Hattie, 1894-1989. Hattie Kendrick papers. 1942-2000.
- Kendrick, Ruby Moyse, 1886-1986. Ruby Moyse Kendrick papers. 1892-1995.
- Kenje Ogata collection, 1924-2002, 2008, 2011.
- Kennan, George, 1845-1924. George Kennan papers, 1840-1937.
- Kennedy, J. C. G. (Joseph Camp Griffith), 1813-1887. J.C.G. Kennedy diary. 1851.
- Kennelly, John McRae, 1895-1978. John McRae Kennelly collection 1917-1919.
- Kenneth Lewis Roberts papers, 1919-1956.
- Kenyon L. Butterfield papers, 1889-1970.
- Kermit Roosevelt and Belle Roosevelt papers, 1725-1975.
- Kermit Roosevelt papers.
- Kern collection, 1905-1945.
- Kern, Jerome, 1885-1945. Jerome Kern collection, 1905-1951.
- Key Pittman papers, 1898-1951.
- Kieran, John, 1892-1981. John Kieran papers, 1917-1985.
- King, Judson, 1872-1958. Judson King papers, 1900-1959.
- Kingsbury, John Adams, 1876-1956. John Adams Kingsbury papers, 1841-1966.
- Kirk Munroe papers, 1850-1940.
- Kleine, George. George Kleine papers, 1886-1946.
- Kleine, George. Select papers from the George Kleine film collection.
- Kleine, George. Select papers from the George Kleine film collection, 1886-1946.
- Klemperer, Otto, 1885-1973. Otto Klemperer archive, 1792-1988.
- Kline, Burton, 1877-1958. Burton Kline papers, 1896-1954.
- Klyce, Scudder, 1879-1933. Scudder Klyce papers, 1911-1933.
- Klyce, Scudder, 1879-1933. Universe. 1921.
- Knox, Annie Reid, 1876-1958. Annie Reid Knox papers. 1936-1954.
- Knox, Dudley Wright, 1877-1960. Dudley Wright Knox papers, 1864-1950.
- Knox, Frank, 1874-1944. Frank Knox papers, 1898-1954.
- Knox, Katharine McCook. Katharine McCook Knox papers, 1802-1975.
- Knox, Philander C. (Philander Chase), 1853-1921. Philander C. Knox papers, 1796-1922.
- Kolisch, Rudolf, 1896-1978. Rudolf Kolisch collection, 1921-1943.
- Koller, Carl, 1857-1944. Carl Koller papers, 1866-1988.
- Königliche Preussische Messbildanstalt collection (Library of Congress).
- Korson, George Gershon, 1899-1967. Coal dust on the fiddle; songs and stories of the bituminous industry.
- Korson, George Gershon, 1899-1967. George Korson collection, 1913-1975.
- Kortschak, Hugo, 1884-1957. Hugo Kortschak correspondence and photographs, 1904-1950.
- Kostelanetz, Andre, 1901-1980. Andre Kostelanetz collection, 1922-1984.
- Koszarski, Richard. Richard Koszarski collection of research material on the early history of Universal Pictures Corporation, 1906-1996.
- Koussevitzky archive 1880-1978.
- Koussevitzky, Serge, 1874-1951. Serge Koussevitzky archive, 1880-1978.
- Krafchik, Jennifer. Jennifer Krafchik papers.
- Kreisler collection, 1845-1969.
- Kreisler, Fritz, 1875-1962. Fritz Kreisler collection, 1845-1969.
- Krueger, Karl, 1894-1979. Society for the Preservation of the American Musical Heritage collection, 1792-1969.
- Kruger, Louis M., 1861-1934. Louis M. Kruger performance library, 1879-1919.
- Kubie, Lawrence S. (Lawrence Schlesinger), 1896-1973. Lawrence S. Kubie papers, 1916-1978.
- Kunz, George Frederick, 1856-1932. George Frederick Kunz papers, 1783-1930.
- KWKH (Radio station : Shreveport, La.). Louisiana hayride collection, 1904-2006.
L
- La Follette, Belle Case, 1859-1931. Belle Case La Follette papers. 1879-1931.
- La Follette family. La Follette family papers, 1781-1988.
- La Follette family papers, 1781-1988.
- La Follette, Fola, 1882-1970. Fola La Follette papers. 1879-1970.
- La Follette, Mary Josephine, 1899-1988. Mary Josephine La Follette papers. 1925-1988.
- La Follette, Philip Fox, 1897-1965. Philip Fox La Follette papers. 1911-1971.
- La Follette, Robert M. (Robert Marion), 1855-1925. Robert M. La Follette papers. 1844-1925.
- La Follette, Robert M. (Robert Marion), 1895-1953. Robert M. La Follette papers. 1895-1960.
- La Motte, Ellen N. (Ellen Newbold), 1873-1961. Ellen N. La Motte collection on opium traffic, 1919-1933.
- Lafayette, Marie Joseph Paul Yves Roch Gilbert Du Motier, marquis de, 1757-1834. Marie Joseph Paul Yves Roch Gilbert Du Motier, marquis de Lafayette, papers, 1776-1934.
- Lamont, Daniel Scott, 1851-1905. Daniel Scott Lamont papers, 1853-1928.
- Lamson-Scribner, F. F. Lamson-Scribner papers, 1885-1938.
- Land, Emory Scott, 1879-1971. Emory Scott Land papers, 1901-1972.
- Landowska, Wanda. Wanda Landowska and Denise Restout papers, 1843-2002.
- Lane, J. F., active 1834-1835. J.F. Lane letterbook. 1834-1835.
- Langelan, Martha J. Martha J. Langelan papers.
- Langmuir, Irving, 1881-1957. Irving Langmuir papers, 1871-1957.
- Langs, John Pierce, 1882-1967. John Pierce Langs papers, 1896-2001.
- Lansing, Robert, 1864-1928. Robert Lansing papers, 1831-1959.
- Larson family papers.
- Larson, Frans August, 1870-1957. Frans August Larson family papers, 1864-2021.
- Larson, Frans August, 1870-1957. Frans August Larson papers.
- Larson, Mary Rodgers, 1869-1947. Mary Rodgers Larson papers.
- Lathrop, William Addison. William Addison Lathrop papers.
- Laughlin, J. Laurence (James Laurence), 1850-1933. J. Laurence Laughlin papers, 1902-1931.
- Laura Wood Roper map collection.
- Laura Wood Roper papers, 1822-1982.
- Lauro Ayestarán collection, 1830-1966.
- Lavender, Robert A., 1889-1976. Robert A. Lavender papers, 1911-1976.
- Lawrence, D. H. (David Herbert), 1885-1930. D.H. Lawrence correspondence, notes, and photographs, 1921-1930.
- Lawrence, Dorothea Dix, 1899-1979. Dorothea Dix Lawrence collection, 1856-1980.
- Lawrence S. Kubie papers, 1916-1978.
- Lawrence Van Buren family papers, 1721-1938.
- Lawrie, Lee, 1877-1963. Lee Lawrie papers, 1908-1990.
- Lawton, Henry Ware, 1843-1899. Henry Ware Lawton papers, 1849-1930.
- Layton family papers.
- Layton family. Pierson, Rioch, and Layton families papers, 1777-2012.
- LC archives.
- Le Gallienne, Eva, 1899-1991. Eva Le Gallienne papers, 1823-1997.
- Le Gallienne, Julie Nørregaard, 1863-1942. Julie Nørregaard Le Gallienne papers.
- Le Gallienne, Richard, 1866-1947. Richard Le Gallienne papers.
- Le Garrec, Mary Virginia Foreman. Mary Virginia Foreman Le Garrec collection on Artur Schnabel, 1893-1996.
- League of Composers (U.S.). Modern Music archives, 1909-1983.
- League of Nations. Advisory Committee on Traffic in Opium and Other Dangerous Drugs. League of Nations. Advisory Committee on Traffic in Opium and Other Dangerous Drugs records.
- League of Women Voters records, 1884-1986.
- League of Women Voters (U.S.). League of Women Voters records, 1884-1986.
- Learned Hand papers.
- Learned Hand trial summaries, 1909-1924.
- Learned, Henry Barrett, 1868-1931. Henry Barrett Learned papers, 1907-1931.
- Leason Heberling Adams papers, 1919-1968.
- Lee, Ann Hill Carter, 1773-1829. Ann Hill Carter Lee papers.
- Lee, Anne Robinson McCarty, 1798-1840. Anne Robinson McCarty Lee papers.
- Lee, Charles Carter, 1798-1871. Charles Carter Lee papers.
- Lee de Forest papers, 1884-1955.
- Lee, Elizabeth Collins, -1858. Elizabeth Collins Lee papers.
- Lee family. Ethel Armes collection of Lee family papers, 1671-1936.
- Lee family papers.
- Lee, Francis Watts. Francis Watts Lee papers, 1845-1951.
- Lee, Henry, 1756-1818. Henry Lee papers.
- Lee, Henry, 1787-1837. Henry Lee papers.
- Lee Lawrie papers, 1908-1990.
- Lee, Mary Randolph Custis, 1807-1873. Mary Randolph Custis Lee papers.
- Lee, Richard Bland, 1761-1827. Richard Bland Lee papers.
- Lee, Richard Henry, 1794-1865. Richard Henry Lee papers.
- Lee, Robert E. (Robert Edward), 1807-1870. Robert E. Lee papers.
- Lee, Rowland V., 1891-1975. Rowland V. Lee papers, 1907-1971.
- Lee Strasberg papers, 1780-2006.
- Lee, Thomas, 1690-1750. Thomas Lee papers.
- Leffingwell, R. C. (Russell Cornell), 1878-1960. R.C. Leffingwell letterbooks, 1917-1920.
- Leichtentritt, Hugo, 1874-1951. Hugo Leichtentritt papers, 1888-1972.
- Leighton W. Rogers papers, 1912-1982.
- Leighton William Rogers papers.
- Lejeune, John Archer, 1867-1942. John Archer Lejeune papers, 1815-1950.
- Leland, Charles Godfrey, 1824-1903. Charles Godfrey Leland papers.
- Leland Harrison papers, 1915-1947.
- Leland, Waldo Gifford, 1879-1966. Guide to materials for American history in the libraries and archives of Paris.
- Leland, Waldo Gifford, 1879-1966. Waldo Gifford Leland papers, 1844-1966.
- Lennard H. Mitchell diaries, 1914.
- Lennard H. Mitchell papers.
- Lenroot, Clara Clough, 1856-1942. Clara Clough Lenroot papers.
- Lenroot, Irvine Luther, 1869-1949. Irvine Luther Lenroot papers, 1858-1971.
- Leo Feist collection, 1880-1930.
- Leo Joseph Bailey collection 1917-2008.
- Leo Wolman papers, 1870-1958.
- Leon F. Barnard papers, 1901-circa 1993.
- Leon Hilsberg collection, 1906-1941.
- Leon Hilsberg papers.
- Leonard B. Smith papers, 1859-2001.
- Leonard, John Calvin, 1859-1937. John Calvin Leonard papers, 1882-1920.
- Leonard Porter Ayres papers, 1902-1946.
- Leonard Wood papers, 1825-1942.
- Leonora Jackson McKim papers, 1854-1969.
- Leontiĭ, Metropolitan of All America and Canada, 1876-1965. Leontiĭ, Metropolitan of All America and Canada, papers, 1855-1962.
- Leontiĭ, Metropolitan of All America and Canada, papers, 1855-1962.
- Lepman, Harry, 1904-1970. Harry and Sara Lepman collection, 1890-1945.
- LeRoy Feay Thompson collection 1918-2011.
- Lester F. Ward papers.
- Lester Frank Ward papers, 1883-1906.
- Lester Hood Woolsey papers, 1831-1958.
- Levy, Fanny Yates, 1787-1891 or 1892. Fanny Yates Levy papers.
- Levy, Jacob Clavius, 1788-1875. Jacob Clavius Levy papers.
- Lewis, Ernest Irving, 1873-1947. Ernest Irving Lewis papers, 1897-1944.
- Lewis M. Haupt papers, 1849-1923.
- Lewis Nathaniel Chase papers, 1836-1947.
- Lewis, Nolan D. C. (Nolan Don Carpentier), 1889-1979. Nolan D.C. Lewis papers, 1897-1978.
- Lewis Whitfield Colson papers, 1894-1950.
- Lewis, William A., 1867 or 1868- William A. Lewis journal. 1923.
- Libby, Abial. Abial Libby diary. 1862.
- Libby, Frederick J. (Frederick Joseph), 1874-1970. Frederick Joseph Libby papers, 1846-1973.
- Liberati, Allesandro, 1847-1927. Allesandro and Speranza Liberati papers, 1880-1947.
- Liberia map collection, 1764-1970.
- Library of Congress archives, 1800-2015.
- Library of Congress archives, Building and Grounds Division series.
- Library of Congress archives, Consultants and Fellows series.
- Library of Congress archives, Exchange and Gift Division series.
- Library of Congress archives, Order Division series.
- Library of Congress archives, Photographs, Illustrations, and Objects series.
- Library of Congress. Building and Grounds Division. Building and Grounds Division series, Library of Congress archives, 1871-1954.
- Library of Congress. Building and Grounds Division. Library of Congress. Building and Grounds Division records.
- Library of Congress. Elizabeth Sprague Coolidge Foundation. Elizabeth Sprague Coolidge Foundation collection. 1894-1953.
- Library of Congress. Exchange and Gift Division. Exchange and Gift Division series, Library of Congress archives, 1893-1979.
- Library of Congress. Exchange and Gift Division. Library of Congress. Exchange and Gift Division records.
- Library of Congress. Foreign Copying Program. Library of Congress. Foreign Copying Program reproductions collection.
- Library of Congress. Library of Congress archives. (11)
- Library of Congress. Library of Congress archives, 1800-2015.
- Library of Congress. Manuscript Division. Suffrage Archives. 1759-1961. (2)
- Library of Congress. Music Division. Vaudeville and minstrel photograph collection, circa 1910s-1940.
- Library of Congress. National Audio-Visual Conservation Center. Motion picture copyright descriptions collection. Class L, 1912-1977.
- Library of Congress. National Audio-Visual Conservation Center. Motion picture copyright descriptions collection. Class M, 1912-1977.
- Library of Congress. Office of the Superintendent of Library Building and Grounds. Library of Congress. Office of the Superintendent of Library Building and Grounds records.
- Library of Congress. Order Division. Library of Congress. Order Division records.
- Library of Congress. Order Division. Order Division series, Library of Congress archives, 1898-1991.
- Library of Congress records.
- Lillian Gish papers, 1829-1978.
- Lincoln, Abraham, 1809-1865. Abraham Lincoln correspondence. 1864 July 9.
- Lincoln, Abraham, 1809-1865. Abraham Lincoln papers, 1774-1948.
- Lincoln, Abraham, 1809-1865. Abraham Lincoln papers. 1824-1865.
- Lincoln, Abraham, 1809-1865. Abraham Lincoln papers. 1861-1865.
- Lincoln, Abraham, 1809-1865. Robert Todd Lincoln family papers. 1864-1938.
- Lincoln family papers.
- Lincoln family. Robert Todd Lincoln family papers, 1864-1938.
- Lincoln, Mary Todd, 1818-1882. Robert Todd Lincoln family papers. 1864-1938.
- Lincoln, Robert Todd, 1843-1926. Robert Todd Lincoln family papers, 1864-1938.
- Lind, Olof E., 1889-1971. Olof E. Lind papers, 1713-1996.
- Lindsey, Ben B. (Ben Barr), 1869-1943. Ben B. Lindsey papers, 1838-1957.
- Lispenard Seabury Crocker papers.
- Literary Society of Washington (Washington, D.C.). Literary Society of Washington, Washington, D.C., records, 1873-1991.
- Literary Society of Washington, Washington, D.C., records, 1873-1991.
- Little, Arthur D. (Arthur Dehon), 1863-1935. Arthur D. Little papers, 1884-1973.
- Littlewood, William H. William H. Littlewood map collection.
- Livermore, Eunice. Eunice Livermore papers.
- Livermore, Isaac. Isaac Livermore papers.
- Livingston, Anne Home Shippen, 1763-1841. Anne Home Shippen Livingston papers. (2)
- Lloyd Carpenter Griscom papers, 1898-1951.
- Loeb, Jacques, 1859-1924. Forced movements, tropisms, and animal conduct. 1918.
- Loeb, Jacques, 1859-1924. Jacques Loeb papers, 1889-1924.
- Loeb, Jacques, 1859-1924. Proteins and the theory of colloidal behavior. 1922.
- Loeb, Jacques, 1859-1924. Regeneration from a physico-chemical viewpoint. 1924.
- Loening, Grover, 1888-1976. Grover Cleveland Loening papers, 1900-1975.
- Logan family. John Alexander Logan family papers, 1836-1925.
- Logan, John A., Jr., 1865-1899. John Alexander Logan papers.
- Logan, John A., Mrs., 1838-1923. Mrs. John A. Logan papers.
- Logan, John Alexander, 1826-1886. John Alexander Logan family papers, 1836-1925.
- Logan Pearsall Smith papers, 1760-1946.
- Loines, Mary Hillard, 1844-1944. Mary Hillard Loines papers.
- Loines, Russell Hillard. Russell Hillard Loines papers.
- Long, Breckinridge, 1881-1958. Breckinridge Long papers, 1486-1948.
- Longworth, Alice Roosevelt, 1884-1980. Alice Roosevelt Longworth papers, 1888-1942.
- Longworth, Nicholas, 1869-1931. Nicholas Longworth papers, 1782-1931.
- Look, Richard M. (Richard Millard), 1916-1998. Richard M. Look map collection.
- Lopatnikoff, Nikolai, 1903-1976. Nikolai Lopatnikoff collection, 1916-1979.
- Loper family. Palmer-Loper family papers, 1667-1994.
- Loper, R. F. (Richard F.) R.F. Loper papers.
- Lorand, Sándor, 1892-1987. Sándor Lorand papers, 1914-1978.
- Lorenz, Jennie, 1886-1962. Jennie Lorenz collection relating to Charlotte Cushman, 1830-1960.
- Lorge, Irving, 1905-1961. Semantic count of English words. 1938.
- Lorimer, George Horace, 1869-1937. George Horace Lorimer correspondence.
- Loth, Carl Conrad, 1896-1967. Carl Conrad Loth papers, 1896-1967.
- Lou Herscher music manuscripts, 1896-1968.
- Loudenbeck, Edward Henry, 1895-1972. Edward Henry Loudenbeck collection, 1917-1919.
- Louis F. Post papers, 1864-1940.
- Louis M. Kruger performance library, 1879-1919.
- Louis Milton Ronsheim collection, 1914-2000.
- Louis-Pierre Mouillard papers, 1833-1987.
- Louis Skidmore papers, 1908-1976.
- Louis T. Michener papers, 1880-1927.
- Louis Theodore Michener papers.
- Louis Untermeyer papers.
- Louise Chandler Moulton papers, 1852-1908.
- Louise Imogen Guiney papers, 1884-1920.
- Louise Talma collection, 1861-1998.
- Louise Talma papers, 1861-1998.
- Louisiana hayride collection, 1904-2006.
- Low, Abiel Abbot, 1811-1893. Abiel Abbot Low papers.
- Low, Edward Allen, 1817-1898. Edward Allen Low papers.
- Low family. Low-Mills family papers, 1767-1971.
- Low family papers.
- Low-Mills family papers, 1767-1971.
- Lowe, T. S. C. (Thaddeus Sobieski Coulincourt), 1832-1913. Memoirs of Thaddeus S.C. Lowe, chief of the aeronautic corps of the Army of the United States during the Civil War : my balloons in peace and war.
- Lowe, T. S. C. (Thaddeus Sobieski Coulincourt), 1832-1913. T.S.C. Lowe papers.
- Lowenfeld, Margaret, 1890-1973. Margaret Lowenfeld papers.
- Luce, Stephen Bleecker, 1827-1917. Stephen Bleecker Luce papers, 1799-1955.
- Lucius C. Dunn papers, 1902-1957.
- Lucretia Rudolph Garfield papers, 1807-1958.
- Lurton, Horace H. (Horace Harmon), 1844-1914. Horace H. Lurton papers, 1860-1915.
- Luther Burbank papers, 1830-1989.
- Luther R. Ray architectural drawing archive.
- Luther R. Ray archive.
- Lydia Nadejena papers, 1907-1974.
- Lydia S.M. Robinson collection relating to World War I, 1914-1942.
- Lyman Bryson papers, 1893-1978.
- Lyman J. Gage correspondence, 1897-1906.
- Lyman J. Gage papers.
- Lyman Judson Gage papers.
- Lynch, Grace C., approximately 1892-1970. Grace C. Lynch papers. 1905-1965.
- Lynd, Helen Merrell, 1896-1982. Robert Staughton and Helen Merrell Lynd papers. 1895-1968.
- Lynd, Robert Staughton, 1892-1970. Robert Staughton Lynd and Helen Merrell Lynd papers, 1895-1968.
M
- Maas, Charles Oscar, -1919. Charles Oscar Maas map collection, 1920-1997.
- Maas, Charles Oscar. Charles Oscar Maas papers.
- Maass, Charles. Charles Maass papers, 1912-1924.
- Mabel Thorp Boardman papers, 1853-1945.
- Mabel Walker Willebrandt papers, 1881-1978.
- MacDonald, A. B. (Alexander Black), 1871-1942. A.B. MacDonald papers, 1878-1976.
- MacDonald, Malcolm, 1911- Malcolm MacDonald papers.
- MacDonald, Pirie, 1867-1942. Pirie MacDonald photographic collection.
- MacDowell, Edward, 1860-1908. Edward MacDowell papers.
- MacDowell, Marian, 1857-1956. Marian MacDowell papers, 1876-1969.
- MacKinlay Kantor papers, 1885-1998.
- Maclay, Edgar Stanton, 1863-1919. Edgar Stanton Maclay papers, 1782-circa 1918.
- Macomb, Alexander, 1888-1970. Alexander Macomb papers.
- Macomb, Ann Minerva Rodgers, 1824-1916. Ann Minerva Rodgers Macomb papers.
- Macomb, Christina, 1861-1945. Christina Macomb papers.
- Macomb, Nannie, 1864-1952. Nannie Macomb papers.
- MacVeagh, Franklin, 1837-1934. Franklin MacVeagh papers, 1799-1934.
- Mae West papers.
- Mae West play scripts, 1921-1964.
- Magic miscellanea, 1845-1955.
- Mahan, A. T. (Alfred Thayer), 1840-1914. A.T. Mahan papers, 1779-1970.
- Malaney, Curtis L., 1926-1989. Curtis L. Malaney papers, 1923-1989.
- Malina, Frank J. Frank J. Malina papers, 1912-1986.
- Mamoulian, Rouben. Rouben Mamoulian papers, 1740-1987.
- Mann, James R. (James Robert), 1856-1922. James R. Mann papers, 1887-1922.
- Mann, Thomas, 1875-1955. Thomas Mann papers, 1909-1947.
- Mannes - Damrosch collection, 1848-1986.
- Mannes, David, 1866-1959. Mannes - Damrosch collection, 1848-1986.
- Mansfield, Richard, 1857-1907. Paul Wilstach collection of Richard Mansfield papers. 1889-1918.
- Manuscript holdings from the Library of Oliver Wendell Holmes, Jr. : ca. 1450-1935.
- Manuscript Plays Collection, Library of Congress Copyright Office drama deposits, 1863-1973.
- Maps showing entrenchments in France during World War I at a scale of 1:10,000.
- Maps showing entrenchments in France during World War I at a scale of 1:20,000.
- Marburg, Theodore, 1862-1946. Theodore Marburg papers, 1856-1940.
- March, Peyton Conway, 1864-1955. Peyton Conway March map collection. (2)
- March, Peyton Conway, 1864-1955. Peyton Conway March papers.
- March, Peyton Conway, 1864-1955. Peyton Conway March papers, 1897-1955.
- Margaret Mead papers and South Pacific Ethnographic Archives, 1838-1996.
- Margaret Severn papers.
- Maria Montessori lectures, 1913-1917.
- Maria Montessori papers.
- Marian MacDowell papers, 1876-1969.
- Marie Joseph Paul Yves Roch Gilbert Du Motier, marquis de Lafayette, papers, 1776-1934.
- Mario Castelnuovo-Tedesco papers, 1822-1998.
- Mark L. Bristol papers, 1882-1939.
- Mark Sullivan papers, 1900-1935.
- Markham, Edwin, 1852-1940. Edwin Markham papers, circa 1893-1937.
- Markoe, Sophie D. Sophie D. Markoe papers. 1852-1911.
- Marsh, Benjamin Clarke, 1877-1952. Benjamin Clarke Marsh papers, 1910-1950.
- Marshall P. Wilder papers, 1880-1914.
- Marshall Pinckney Wilder papers.
- Marston, Philip Bourke, 1850-1887. Philip Bourke Marston correspondence.
- Marston, Westland, 1819-1890. Westland Marston correspondence.
- Martin, Glenn L. (Glenn Luther), 1886-1956. Glenn L. Martin papers, 1909-1956.
- Martin Oviatt papers, 1863-1995.
- Marvin Breckinridge papers.
- Mary Amanda Dixon Jones papers, 1839-1925.
- Mary Ann Bickerdyke papers, 1847-1905.
- Mary Church Terrell papers, 1851-1962.
- Mary Elizabeth Hallock Greenewalt papers, 1918-1942.
- Mary French Sheldon papers, 1885-1938.
- Mary Marvin Breckinridge Patterson papers, 1846-2003.
- Mary Virginia Foreman Le Garrec collection of Artur Schnabel materials, 1893-1996.
- Mary Virginia Foreman Le Garrec collection on Artur Schnabel, 1893-1996.
- Mason, Charles, 1804-1882. Charles Mason papers.
- Mason family. Charles Mason Remey family papers, 1778-1949.
- Massachusetts Colonization Society. Massachusetts Colonization Society letterbooks. 1856-1875.
- Matteson, David Maydole, 1871-1949. David Maydole Matteson papers, 1876-1937.
- Matthew Stanley Quay papers, 1776-1949.
- Maud Wood Park papers, 1844-1979.
- Maugham, W. Somerset (William Somerset), 1874-1965. W. Somerset Maugham papers, 1897-1966.
- Max Schur papers, 1923-1974.
- Maxwell Anderson papers, 1920-1989.
- May Robson papers, 1849-1955.
- Mayo, Henry T. (Henry Thomas), 1856-1937. Henry T. Mayo papers, 1866-1972.
- McAdoo, Eleanor Wilson, 1889-1967. Eleanor Wilson McAdoo papers. 1911-1950.
- McAdoo family. Wilson-McAdoo families papers, 1860-1966.
- McAdoo, W. G. (William Gibbs), 1863-1941. W.G. McAdoo papers, 1786-1941.
- McAtee, W. L. (Waldo Lee), 1883-1962. W.L. McAtee papers, 1803-1963.
- McClellan, George B. (George Brinton), 1865-1940. George B. McClellan papers, 1838-1922.
- McClure, Charles, 1838-1902. Charles McClure papers. 1849-1926.
- McClure family. Gibson-Getty-McClure families papers, 1777-1926.
- McConnell, Edward F. Edward F. McConnell papers.
- McConnell family. Pike-McConnell-Donaldson family papers, 1770-1967.
- McConnell, James S. James S. McConnell papers.
- McConnell's Economic Surveys collection.
- McConnell's Economic Surveys (Los Angeles, Calif.). McConnell's Economic Surveys collection.
- McCormick family. Hanna-McCormick family papers, 1792-1985.
- McCormick, Ken, 1906-1997. Ken McCormick collection of Doubleday and Company, inc., records. 1882-1992.
- McCormick, Medill, 1877-1925. Medill McCormick papers.
- McCoy, Frank Ross, 1874-1954. Frank Ross McCoy papers, 1847-1957.
- McCrea, Grace. Grace McCrea papers relating to Denishawn, 1913-1969.
- McCrea, John L. (John Livingstone), 1891-1990. John L. McCrea papers, 1898-1984.
- McElroy, Robert McNutt, 1872-1959. Robert McNutt McElroy papers, circa 1909-1924.
- McGee, Anita Newcomb, 1864-1940. Anita Newcomb McGee papers, 1688-1932.
- McGee, W J, 1853-1912. W J McGee papers, 1880-1916.
- McGlinn, John. John McGlinn collection, 1890s-2010.
- McGowan, Samuel, 1870-1934. Samuel McGowan papers, 1883-1943.
- McKelway, Alexander Jeffrey, 1866-1918. Alexander Jeffrey McKelway papers, 1814-1942.
- McKenney, Flannery & Craighill. McKenney, Flannery & Craighill records.
- McKim, Charles Follen, 1847-1909. Charles Follen McKim papers, 1838-1929.
- McKim collection, 1899-1991.
- McKim, Leonora Jackson, 1879-1969. Leonora Jackson McKim papers, 1854-1969.
- McKim (Leonora Jackson and William Duncan McKim) collection.
- McKinlay, Whitefield, 1852-1941. Whitefield McKinlay papers. 1848-1913.
- McKinley, William, 1843-1901. William McKinley map collection.
- McKinley, William, 1843-1901. William McKinley map collection, 1890-1906.
- McKinley, William, 1843-1901. William McKinley papers.
- McKinley, William, 1843-1901. William McKinley papers, circa 1847-1935.
- McKinley, William Brown, 1856-1926. William Brown McKinley papers.
- McLain, William. William McLain papers. 1831-1850.
- McLean, Evalyn Walsh, 1886-1947. Evalyn Walsh McLean papers, 1874-1948.
- McLean, Evalyn Walsh, 1886-1947. Father struck it rich. 1936.
- McLeod, Norman Z., 1898-1964. Norman Z. McLeod papers.
- McManus-Young clipping collection of materials on magic, 1870-1955.
- McNary, Charles Linza, 1874-1944. Charles Linza McNary papers, 1921-1944.
- McNeill, Bertha C. (Bertha Clay), 1887-1979. Bertha C. McNeill papers. 1906-1979.
- McNeill family papers.
- McNeill family. Robert H. McNeill family papers, 1839-2008.
- McNeill, Mary A. (Mary Alice), 1883-1959. Mary A. McNeill papers. 1839-1959.
- McNeill, Robert H., 1917-2005. Robert H. McNeill family collection.
- McNeill, Robert H., 1917-2005. Robert H. McNeill family papers, 1839-2008.
- McNeill, William C. (William Clarence), 1878-1964. William C. McNeill papers. 1868-1964.
- McPherson, Bessie. Bessie McPherson papers. 1882-1936.
- Mead, Margaret, 1901-1978. Margaret Mead papers and South Pacific Ethnographic Archives, 1838-1996.
- Mearns, Edgar Alexander, 1856-1916. Edgar Alexander Mearns papers, 1864-1918.
- Medtner, Nikolay Karlovich, 1880-1951. Nikolay Karlovich Medtner papers, 1826-1954.
- Meier, Nellie Simmons, -1939. Nellie Simmons Meier papers, 1898-1938.
- Meigs, John Forsyth, 1848-1924. John Forsyth Meigs papers, 1914-1940.
- Meigs, Merrill C. (Merrill Church), 1883-1968. Merrill C. Meigs diary.
- Meigs, Return Jonathan, 1740-1823. Return Jonathan Meigs papers.
- Meigs, Return Jonathan, 1764-1825. Return Jonathan Meigs papers.
- Melville Weston Fuller papers, 1794-1949.
- Mercer Green Johnston papers, 1860-1954.
- Mercy-Argenteau family papers, 1410-1921.
- Mercy family. Mercy-Argenteau family papers, 1410-1921.
- Mercy family papers.
- Merriam, C. Hart (Clinton Hart), 1855-1942. C. Hart Merriam papers, 1864-1938.
- Merriam, John C. (John Campbell), 1869-1945. John C. Merriam papers, 1899-1938.
- Merrill, George P. (George Perkins), 1854-1929. George P. Merrill correspondence and autographs, 1803-1926.
- Mestre, José Manuel, 1832-1886. José Manuel Mestre papers. circa 1860-1870.
- Mexican Revolution newspaper clippings archive, 1911-1913.
- Meyer, Agnes E., 1887-1970. Agnes Elizabeth Ernst Meyer papers, 1853-2010.
- Meyer, Eugene, 1875-1959. Eugene Meyer papers, 1864-1975.
- Meyer, George von Lengerke, 1858-1918. George von Lengerke Meyer papers, 1900-1917.
- Michener, Louis T. (Louis Theodore), 1848-1928. Louis T. Michener papers, 1880-1927.
- Middleton, George, 1880-1967. George Middleton papers, 1872-1970.
- Miles-Cameron families correspondence, 1661-1956.
- Miles-Cameron families papers.
- Miles family. Miles-Cameron families correspondence, 1661-1956.
- Miles family papers.
- Miles, Nelson Appleton, 1839-1925. Miles-Cameron families correspondence, 1661-1956.
- Millay, Cora Buzzell. Cora Buzzell Millay papers.
- Millay, Edna St. Vincent, 1892-1950. Edna St. Vincent Millay papers, 1830-2013.
- Millay, Norma. Norma Millay papers.
- Miller, Adolph Caspar, 1866-1953. Adolph Caspar Miller papers, 1913-1947.
- Miller, Charles, approximately 1883-1979. Charles Miller collection of music manuscripts, 1924-1945.
- Miller, Cyrus Robinson, 1874-1947. Cyrus Robinson Miller papers, 1897-1940.
- Miller, Ewing Harry, 1890-1923. Ewing Harry Miller collection, 1917-1923.
- Mills family. Low-Mills family papers, 1767-1971.
- Mills family papers.
- Milton Ager collection.
- Milton Ager music manuscripts, circa 1918-1979.
- Milton, George Fort, 1894-1955. George Fort Milton papers, 1828-1985.
- Minnie Maddern Fiske and Harrison Grey Fiske papers, 1818-1955.
- Minnie Maddern Fiske papers.
- Mira Lloyd Dock papers, 1814-1951.
- Miscellaneous papers in the Sigmund Freud collection, 1866-1983.
- Mitchel, John Purroy, 1879-1918. John Purroy Mitchel papers, 1835-1932.
- Mitchell, Antoinette Brooks, 1892-1972. Antoinette Brooks Mitchell papers. 1894-1974.
- Mitchell, Lennard H. (Lennard Harris), 1881-1944. Lennard H. Mitchell diaries, 1914.
- Mitchell, Louis A., 1885-1957. Louis A. Mitchell papers. 1894-1974.
- Mitchell, Louis A., 1914-1972. Louis A. Mitchell papers. 1912-1972.
- Mitchell, Samuel Chiles, 1864-1948. Samuel Chiles Mitchell papers, 1903-1913.
- Mitchell, Samuel Chiles, 1864-1948. Unpublished biography of Robert C. Ogden.
- Mitchell, William, 1879-1936. General William Mitchell papers, 1888-1946.
- Modern Music archives, 1909-1983.
- Moldenhauer archives at the Library of Congress, circa 1000-circa 1990.
- Moldenhauer, Hans. Moldenhauer archives at the Library of Congress, circa 1000-circa 1990.
- Monday, Henry Albert, 1876-1942. Henry Albert Monday collection relating to Mexico, 1522-1935.
- Montessori, Maria, 1870-1952. Maria Montessori lectures, 1913-1917.
- Montgomery, Benjamin T. (Benjamin Thornton), 1819-1877. Benjamin T. Montgomery family papers, 1872-1987.
- Montgomery, Emily Redington, 1839-1898. Emily Redington Montgomery papers.
- Montgomery family. Benjamin T. Montgomery family papers, 1872-1987.
- Montgomery family. Montgomery family papers, 1771-1974.
- Montgomery family papers.
- Montgomery family papers, 1771-1974.
- Montgomery, George Redington, 1870-1945. George Redington Montgomery papers.
- Montgomery, Giles Foster, 1835-1888. Giles Foster Montgomery papers.
- Montgomery, Marshall Hugh, 1909-2000. Marshall Hugh Montgomery papers.
- Montgomery Meigs Taylor papers, 1890-1935.
- Moody, William H. (William Henry), 1853-1917. William H. Moody papers, 1879-1916.
- Moody, William H. (William Henry), 1853-1917. William H. Moody papers. 1906-1910.
- Moon, John Austin, 1855-1921. John Austin Moon papers, 1832-1921.
- Moore, Charles, 1855-1942. Charles Moore papers, 1848-1944.
- Moore, John Bassett, 1860-1947. John Bassett Moore papers, 1866-1949.
- Moore, Joseph Arthur, 1879-1937. Joseph Arthur Moore papers, 1910-1927.
- Moorfield Storey papers, 1876-1929.
- Moral Re-armament (Organization) Moral Re-armament records.
- Moral Re-armament (Organization). Moral Re-armament records, 1812-1991.
- Moral Re-armament (Organization). Visual materials from the Moral Re-armament records.
- Moral Re-armament records, 1812-1991.
- Moreton Frewen papers, 1823-1934.
- Morgan, John Tyler, 1824-1907. John Tyler Morgan papers, 1840-1907.
- Morgenthau, Henry, 1856-1946. Henry Morgenthau papers, 1795-1941.
- Morris, Arthur J., 1881-1973. Arthur J. Morris papers, 1888-1976.
- Morris dance photograph collection.
- Morris, Roland S. (Roland Sletor), 1874-1945. Roland S. Morris papers, 1910-1943.
- Morris, William Sylvanus, 1888-1947 William Sylvanus Morris collection, 1917-2016.
- Morrisson, Mary Foulke. Mary Foulke Morrisson scrapbooks.
- Morton L. Deyo papers, 1911-1981.
- Moseley, George Van Horn, 1874-1960. George Van Horn Moseley papers, 1855-1960.
- Moseley, George Van Horn, 1874-1960. One soldier's journey.
- Moss, George H. George H. Moss collection of sheet music, 1885-1935.
- Motion picture copyright descriptions collection. Class L, 1912-1977.
- Motion picture copyright descriptions collection. Class M, 1912-1977.
- Mouillard, Louis-Pierre, 1834-1897. Louis-Pierre Mouillard papers, 1833-1987.
- Moulton, Louise Chandler, 1835-1908. Louise Chandler Moulton papers, 1852-1908.
- Mount Rushmore National Memorial Commission. Mount Rushmore National Memorial Commission records. 1920-1941.
- Mulford, Clarence Edward, 1883-1956. Clarence Edward Mulford papers, 1921-1936.
- Mullett & Co. architectural drawing archive (Library of Congress).
- Mullett & Co. collection.
- Munroe, Kirk, 1850-1930. Kirk Munroe papers, 1850-1940.
- Munroe, Mabel Stearns. Mabel Stearns Munroe papers.
- Munroe, Mary Barr. Mary Barr Munroe papers.
- Murdock, Marcellus M. (Marcellus Marion), 1883-1970. Marcellus M. Murdock papers. 1903-1943.
- Murdock, Marshall M. (Marshall Mortimer), 1837-1908. Marshall M. Murdock papers. 1863-1904.
- Murdock, Victor. Victor Murdock papers, 1824-1971.
- Muriel H. Parry map collection.
- Murray, George D., 1886-1956. George D. Murray papers, 1916-1956.
- Music of John Philip Sousa and Victor Grabel.
- Music of the Sousa Band and Victor Grabel, 1861-1954.
- Mustin, Henry Croskey, 1874-1923. Henry Croskey Mustin papers, 1886-1924.
N
- NAACP records.
- Nadejena, Lydia, 1892?-1977. Lydia Nadejena papers, 1907-1974.
- Naseef family. Naseef-Page family papers, 1880-1936.
- Naseef family papers.
- Naseef-Page family papers, 1880-1936.
- Nathan Appleton papers, 1850-1904.
- Nathan Sargent papers, 1866-1957.
- Nathaniel Sisson papers, 1838-1932.
- Nathaniel Wright family papers, 1787-1917.
- National American Woman Suffrage Association. League of Women Voters. National American Woman Suffrage Association. League of Women Voters records.
- National American Woman Suffrage Association. National American Woman Suffrage Association records, 1839-1961.
- National American Woman Suffrage Association records, 1839-1961.
- National Association for the Advancement of Colored People, compiler. National Association for the Advancement of Colored People map collection.
- National Association for the Advancement of Colored People. National Association for the Advancement of Colored People records, 1842-2019.
- National Association for the Advancement of Colored People records, 1842-2019.
- National Association for the Advancement of Colored People. Washington Bureau. National Association for the Advancement of Colored People. Washington Bureau records. 1914-1993.
- National Association for Universal Military Training. National Association for Universal Military Training records, 1909-1933.
- National Association for Universal Military Training records, 1909-1933.
- National Biographical Society (Washington, D.C.) National Biographical Society (Washington, D.C.) records.
- National Broadcasting Company history files, 1922-1986.
- National Broadcasting Company. National Broadcasting Company history files, 1922-1986.
- National Broadcasting Company press releases. Part I, 1924-1950.
- National Child Labor Committee (U.S.). National Child Labor Committee (U.S.) records, 1904-1953.
- National Child Labor Committee (U.S.) records, 1904-1953.
- National Civic Federation. Woman's Department. District of Columbia Section. Charlotte Everett Hopkins collection of National Civic Federation. Woman's Department. District of Columbia Section records. 1900-1926.
- National Civic Federation. Woman's Department. District of Columbia Section. National Civic Federation. Woman's Department. District of Columbia Section records. 1900-1926.
- National Committee on Federal Aid to Education. National Committee on Federal Aid to Education records.
- National Consumers' League. National Consumers' League records, 1882-2003.
- National Consumers' League records, 1882-2003.
- National League of Women Voters (U.S.) National League of Women Voters (U.S.) records.
- National Photo Company collection.
- National Photo Company. National Photo Company collection.
- National Progressive Republican League. National Progressive Republican League records. 1911-1912.
- National Woman's Party. National Woman's Party records.
- National Woman's Party. National Woman's Party records, 1850-2022.
- National Woman's Party records, 1850-2022.
- National Woman's Party. Visual materials from the National Woman's Party records.
- National Women's Trade Union League of America. National Women's Trade Union League of America records, 1903-1950.
- National Women's Trade Union League of America records, 1903-1950.
- Nazi party and other early 20th century German history related posters.
- Nazimova, 1879-1945. Nazimova collection, 1877-1988.
- Nazimova collection, 1877-1988.
- Nazimova papers.
- NBC press releases. Part I, 1924-1950.
- Nellie Simmons Meier papers, 1898-1938.
- Nelson Appleton Miles papers.
- Nelson T. Johnson papers, 1916-1955.
- Nelson W. Aldrich papers, 1777-1930.
- Nelson W. Jordan family papers, circa 1864-2003.
- Nepomuceno, Alberto, 1864-1920. Abul.
- Nepomuceno, Alberto, 1864-1920. Alberto Nepomuceno collection, 1887-1988.
- Nepomuceno, Alberto, 1864-1920. Artemis.
- Nepomuceno, Alberto, 1864-1920. Peças líricas.
- Nepomuceno, Alberto, 1864-1920. Quartets, violins (2), viola, cello, no. 1, B minor.
- Nepomuceno, Alberto, 1864-1920. Quartets, violins (2), viola, cello, no. 2, G minor.
- Nepomuceno, Alberto, 1864-1920. Quartets, violins (2), viola, cello, no. 3, D minor.
- Nepomuceno, Alberto, 1864-1920. Série brasileira.
- Nepomuceno, Alberto, 1864-1920. Suite antiga.
- Nevin, Wilberforce, -1899. Wilberforce Nevin letterbook. 1861-1864.
- New York Society for the Suppression of Vice. New York Society for the Suppression of Vice records, 1871-1953.
- New York Society for the Suppression of Vice records, 1871-1953.
- New York World-Telegram and the Sun newspaper photograph collection (Library of Congress). (3)
- Newcomb, Simon, 1835-1909. Simon Newcomb papers, 1813-1949.
- Newell, Frederick Haynes, 1862-1932. Frederick Haynes Newell papers, 1885-1931.
- Newman I. White papers, 1812-1929.
- Newton Diehl Baker papers, 1896-1962.
- Nicaraguan Canal Commission (U.S.) Nicaraguan Canal Commission (U.S.) records.
- Nicholas Longworth papers, 1782-1931.
- Nichols, Jeannette Paddock, 1890-1982. Jeannette Paddock Nichols biographer's papers. 1860-1930.
- Nicholson, Augustus S., 1830-1911. Augustus S. Nicholson papers, 1861-1934.
- Nicholson, Joseph Hopper, 1770-1817. Joseph Hopper Nicholson papers.
- Nicholson, Joseph, Jr., -1786. Joseph Nicholson Jr. papers.
- Nicholson, Rebecca Lloyd, 1771-1847. Rebecca Lloyd Nicholson papers.
- Nicolas Slonimsky collection, 1873-1997.
- Nicolay, Helen, 1866-1954. Helen Nicolay papers.
- Nicolay, John G. (John George), 1832-1901. John G. Nicolay papers, 1811-1943.
- Niehaus, Earl F. Earl F. Niehaus thesis. 1955.
- Nielsen, Fred Kenelm, 1879-1963. Fred Kenelm Nielsen papers, 1881-1961.
- Nijinska, Bronislava, 1891-1972. Bronislava Nijinska collection, circa 1740-1996.
- Nikola Tesla correspondence, 1890-1934.
- Nikola Tesla papers.
- Nikolai Lopatnikoff collection, 1916-1979.
- Nikolay Karlovich Medtner papers, 1826-1954.
- Noel Deisch papers, 1910-1937.
- Nolan D.C. Lewis papers, 1897-1978.
- Norbert Hilsberg collection.
- Norman H. Davis papers, 1898-1979.
- Norman Hapgood and Elizabeth Reynolds Hapgood papers, 1824-1977.
- Norris, George W. (George William), 1861-1944. George W. Norris papers, 1864-1954.
- North American Review correspondence, 1858-1912.
- North American Review papers.
- North, Gary W. Gary W. North map collection.
- Norton, Reuben S. Reuben S. Norton papers.
- Novotný, Antonín, 1891-1978. Antonín Novotný papers, 1848-1966.
- NSDAP posters from the "Kampfzeit".
- NYWT&S collection (Library of Congress). (3)
O
- O'Connor, William Douglas, 1832-1889. William Douglas O'Connor papers.
- O'Hara, Eliot, 1890-1969. Eliot O'Hara correspondence.
- O'Hara, Shirley Putnam, 1886- Shirley Putnam O'Hara correspondence and diaries.
- O'Laughlin, John Callan, 1873-1949. John Callan O'Laughlin papers, 1895-1949.
- O'Neil, Charles, 1842-1927. Charles O'Neil papers, 1833-1927.
- O'Reilly, Alejandro, 1725-1794. Alejandro O'Reilly manuscript volume.
- Oberholser, Harry C. (Harry Church), 1870-1963. Harry C. Oberholser papers, 1856-1960.
- Octave Chanute papers, 1807-1955.
- Ogata, Kenje, 1919-2012. Kenje Ogata collection, 1924-2002, 2008, 2011.
- Ogden, Robert C. (Robert Curtis), 1836-1913. Robert C. Ogden papers, 1843-1913.
- Ogle, Dora G. Dora G. Ogle papers.
- Oldberg, Arne, 1874-1962. Arne Oldberg collection, circa 1887-1962.
- Oliver Ellsworth family papers, 1762-1907.
- Oliver Freud and Henny Fuchs Freud papers, 1821-1993.
- Oliver Freud papers.
- Oliver Wendell Holmes papers, 1837-1931.
- Olmsted Associates. Olmsted Associates records.
- Olmsted Associates. Olmsted Associates records, 1863-1971.
- Olmsted Associates records, 1863-1971.
- Olmsted Brothers. Olmsted Brothers records. (2)
- Olmsted, Frederick Law, 1822-1903. Frederick Law Olmsted papers. (2)
- Olmsted, Frederick Law, 1822-1903. Frederick Law Olmsted papers, 1777-1952.
- Olmsted, Frederick Law, 1870-1957. Frederick Law Olmsted papers.
- Olmsted, Gideon, 1749-1845. Gideon Olmsted papers.
- Olmsted, John, 1791-1873. John Olmsted papers.
- Olmsted, John Charles, 1852-1920. John Charles Olmsted papers.
- Olmsted, Olmsted, and Eliot. Olmsted, Olmsted, and Eliot records. (2)
- Olney, Richard, 1835-1917. Richard Olney papers, 1830-1928.
- Olof E. Lind papers, 1713-1996.
- Open-air school collection of photographs.
- Oppenheim, David, 1922-2007. David Oppenheim papers, 1910-2004.
- Order Division series, Library of Congress archives, 1898-1991.
- Orr, Charlotte Pettis. Charlotte Pettis Orr papers.
- Orr, William, 1860-1939. William Orr papers, 1890-1939.
- Orville Wright papers.
- Oscar Hammerstein II collection, 1847-2000.
- Oscar S. Straus Memorial Association. Oscar S. Straus Memorial Association records. 1927-1954.
- Oscar S. Straus papers, 1856-1955.
- Oscar Terry Crosby papers, 1878-1947.
- Osgood family. Field-Osgood family papers, 1702-1938.
- Osgood family papers.
- Osgood, Maria Bowne Franklin. Maria Bowne Franklin Osgood papers.
- Osgood, Samuel, 1748-1813. Samuel Osgood papers.
- Oskar Ursinus collection of aeronautical pictures.
- Oskar Ursinus papers, 1908-1943.
- Oswald Veblen papers, 1881-1960.
- Otto Isakower and Salomea Isakower papers, 1880-1975.
- Otto Isakower papers.
- Otto Klemperer archive, 1792-1988.
- Oviatt, Martin. Martin Oviatt papers, 1863-1995.
- Owen, Robert L. (Robert Latham), 1856-1947. Robert Latham Owen papers, 1910-1941.
- Owen Wister papers, 1829-1966.
- Oxnam, G. Bromley (Garfield Bromley), 1891-1963. G. Bromley Oxnam papers, 1823-1963.
P
- P. Phillips family papers, 1832-1914.
- Page, Curtis Hidden, 1870-1946. Correspondence and poetry.
- Page family. Naseef-Page family papers, 1880-1936.
- Page family papers.
- Palmer, Alexander Smith, 1806-1894. Alexander Smith Palmer papers.
- Palmer family. Palmer-Loper family papers, 1667-1994.
- Palmer, John McAuley, 1870-1955. John McAuley Palmer papers, 1863-1977.
- Palmer-Loper family papers, 1667-1994.
- Palmer, Nathaniel Brown, 1799-1877. Nathaniel Brown Palmer papers.
- Palmer, T. S. (Theodore Sherman), 1868-1955. T.S. Palmer papers, 1877-1954.
- Pankejeff, Sergius, 1887-1979. Sergius Pankejeff papers, 1901-1979.
- Papers from the Isabelle Sayers collection, circa 1886-1980.
- Papers from the Jim Walsh collection, 1867-1987, and undated.
- Papers relating to the Ford peace plan, 1915-1918.
- Parent, John Carroll, Sr., 1885-1961. John Carroll Parent, Sr., collection 1907-2015.
- Park family. Ham, Connelly, Parks, and Snodgrass families papers, 1870-2018.
- Park, Maud Wood, 1871-1955. Maud Wood Park papers, 1844-1979.
- Parker, Alton B. (Alton Brooks), 1852-1926. Alton B. Parker papers, 1878-1937.
- Parker, Francis LeJau, 1873-1966. Francis LeJau Parker papers, 1905-1935.
- Parks family papers.
- Parr-Gere, Florence, 1875- Florence Parr-Gere papers, 1856-1964.
- Parry, Muriel H., 1922-2004. Muriel H. Parry map collection.
- Parsons, Henry William, 1840-1914. Henry William Parsons papers, 1871-1986.
- Patri, Angelo, 1876-1965. Angelo Patri papers, 1904-1962.
- Patterson, C. P. (Carlile Pollock), 1816-1881. C.P. Patterson papers.
- Patterson, Eliza Pearson, 1826-1902. Eliza Pearson Patterson papers.
- Patterson family. Patterson-Winslow family papers, 1813-1963.
- Patterson, Jefferson, 1891-1977. Jefferson Patterson correspondence and poetry.
- Patterson, Jefferson, 1891-1977. Jefferson Patterson papers, 1824-1981.
- Patterson, Mary Marvin Breckinridge, 1905-2002. Mary Marvin Breckinridge Patterson papers, 1846-2003.
- Patterson, Richard Sharpe, 1908-1976. Richard Sharpe Patterson papers, 1776-1998.
- Patterson-Winslow family papers, 1813-1963.
- Pattie Gresham papers.
- Patton, George S. (George Smith), 1885-1945. George S. Patton papers, 1807-1979.
- Paul, Alice, 1885-1977. Alice Paul papers.
- Paul F. Stiga collection of stage and costume design, 1821-2017.
- Paul Federn papers, 1864-1975.
- Paul J. Pelz papers, circa 1800-1921.
- Paul Wayland Bartlett papers, 1875-1959.
- Paul Wilstach collection of Richard Mansfield papers, 1889-1918.
- Paul Wilstach papers.
- Paulding, Holmes O. (Holmes Offley), 1853-1883. Holmes O. Paulding diary. 1876.
- Paulette Greene papers, 1920-1998.
- Peabody, George Foster, 1852-1938. George Foster Peabody papers, 1894-1937.
- Pearcy, George Washington, 1915-1944. George Washington Pearcy collection, 1915-1949.
- Peirce, Waldo, 1884-1970. Waldo Peirce papers, 1889-1985.
- Pelz, Paul J., 1841-1918. Paul J. Pelz papers, circa 1800-1921.
- Pennell, Elizabeth Robins, 1855-1936. Pennell-Whistler collection. 1597-1937.
- Pennell, Joseph, 1857-1926. Pennell-Whistler collection, 1597-1937.
- Pennell-Whistler collection, 1597-1937.
- People's Legislative Service. People's Legislative Service records, 1921-1931.
- People's Legislative Service records, 1921-1931.
- Percival Flack Brundage papers, 1918-1979.
- Percy Grainger reproductions of selected papers.
- Perlstein, Israel, 1897-1975. Israel Perlstein collection relating to Imperial Russia, 1613-1914.
- Perry, Matthew Calbraith, 1794-1858. Matthew Calbraith Perry papers.
- Perry, Oliver Hazard, 1785-1819. Oliver Hazard Perry papers.
- Perry S. Heath papers, 1890-1983.
- Perry Sanford Heath papers.
- Pershing, Helen F. (Helen Frances), 1880-1915. Helen F. Pershing papers.
- Pershing, John J. (John Joseph), 1860-1948. John J. Pershing papers.
- Pershing, John J. (John Joseph), 1860-1948. John J. Pershing papers, 1882-1971.
- Personal Narratives of the Forced Removal and Incarceration of Japanese Americans During World War 2.
- Personal Narratives of the Forced Removal and Incarceration of Japanese Americans During World War II.
- Personal Narratives of the Forced Removal and Incarceration of Japanese Americans During World War Two.
- Peter A. Demens papers, 1880-2000.
- Peter Shemonsky collection, 1899-1970.
- Peters, Thomas Kimmwood, 1879-1973. Thomas Kimmwood Peters papers, 1896-1973.
- Peyton Conway March map collection.
- Peyton Conway March papers, 1897-1955.
- Pforzheimer, Carl H. (Carl Howard), 1879-1957. Pforzheimer collection of Bruce Rogers materials, 1200-1957.
- Pforzheimer collection of Bruce Rogers materials, 1200-1957.
- Phelps, John S. (John Smith), 1814-1886. John S. Phelps papers.
- Phelps, Mary Whitney. Mary Whitney Phelps papers.
- Phi Beta Kappa. Phi Beta Kappa records, 1776-2006.
- Phi Beta Kappa records, 1776-2006.
- Philander C. Knox papers, 1796-1922.
- Philip E. Scholz collection, 1918-1920.
- Philip Lee Phillips papers, 1885-1921.
- Philippe Bunau-Varilla papers, 1877-1955.
- Phillips, Carrie Fulton, 1873-1960. Warren G. Harding-Carrie Fulton Phillips correspondence, 1910-1924.
- Phillips, Eugenia Levy. Eugenia Levy Phillips journal. 1861-1862.
- Phillips / Mathée collection, 1900-2014.
- Phillips, P. (Philip), 1807-1884. P. Phillips family papers, 1832-1914.
- Phillips, Philip Lee, 1857-1924. Philip Lee Phillips papers, 1885-1921.
- Phillips, W. Hallett (William Hallet), 1853-1897. W. Hallett Phillips papers.
- Photograph album on early aviation owned by the family of Ian Hornak.
- Photographs, Illustrations, and Objects series, Library of Congress archives, 1909-1991.
- Photographs selected from the Königliche Preussische Messbildanstalt.
- Pickerill, Elmo N. (Elmo Neale), 1885-1968. Elmo N. Pickerill papers, 1910-1975.
- Pickett family. Christiancy and Pickett families papers, 1835-1998.
- Pickett family papers.
- Pickett, George E. (George Edward), 1825-1875. George E. Pickett papers.
- Pickett, George E. (George Edward), 1891 or 1892-1959. George E. Pickett papers.
- Pickett, La Salle Corbell, 1848-1931. La Salle Corbell Pickett papers.
- Pickow, George. Jean Ritchie and George Pickow collection, 1923-2015.
- Pierson family papers.
- Pierson family. Pierson, Rioch, and Layton families papers, 1777-2012.
- Pierson, Rioch, and Layton families papers, 1777-2012.
- Pike family. Pike-McConnell-Donaldson family papers, 1770-1967.
- Pike-McConnell-Donaldson family papers, 1770-1967.
- Pinchot, Amos, 1873-1944. Amos Pinchot papers, 1856-1945.
- Pinchot, Cornelia Bryce, 1881-1960. Cornelia Bryce Pinchot papers, 1899-1960.
- Pinchot, Gifford, 1865-1946. Gifford Pinchot map collection.
- Pinchot, Gifford, 1865-1946. Gifford Pinchot papers, 1770-1972.
- Pinchot, James W., 1831-1908. James W. Pinchot papers.
- Pinchot, Mary Eno. Mary Eno Pinchot papers.
- Pinchot, Rosamond, 1904-1938. Rosamond Pinchot papers, 1918-1955.
- Pinhey, Amy Putnam. Amy Putnam Pinhey correspondence and diaries.
- Pinkerton, Allan, 1819-1884. Allan Pinkerton papers.
- Pinkerton, Allan, 1876-1930. Allan Pinkerton papers.
- Pinkerton, Robert A., 1904-1967. Robert A. Pinkerton papers.
- Pinkerton, Robert A. (Robert Allan), 1848-1907. Robert A. Pinkerton papers.
- Pinkerton, William A. (William Allan), 1846-1923. William A. Pinkerton papers.
- Pinkerton's National Detective Agency. Pinkerton's National Detective Agency records, 1853-1999.
- Pinkerton's National Detective Agency records, 1853-1999.
- Pirie MacDonald photographic collection.
- Pittman, Key, 1872-1940. Key Pittman papers, 1898-1951.
- Plitt, George. George Plitt papers. 1836-1873.
- Pollard family. Coolidge-Pollard families papers, 1818-2015.
- Pollard family papers.
- Pollard, Isaac, Jr., 1830-1917. Isaac Pollard, Jr., correspondence and diary. 1850-1855.
- Pollitzer, Anita, 1894-1975. Anita Pollitzer papers.
- Poor, Alfred Easton, 1899-1988. Alfred Easton Poor papers, 1866-1985.
- Porter, Horace, 1837-1921. Horace Porter papers, 1853-1922.
- Post, Alice Thacher, 1853-1947. Alice Thacher Post papers.
- Post, Louis F. (Louis Freeland), 1849-1928. Louis F. Post papers, 1864-1940.
- Powell, E. Alexander (Edward Alexander), 1879-1957. E. Alexander Powell papers, 1893-1957.
- Powell, Sophy Hulsizer, -1937. Sophy Hulsizer Powell papers.
- Pratt, Bela Lyon, 1867-1917. Bela Lyon Pratt papers, 1884-1918.
- Pray, Eleanor Lord, 1868-1954. Eleanor Lord Pray papers, 1894-1975.
- Presbyterian Church in the U.S.A. Presbytery of Washington City. Presbyterian Church in the U.S.A. Presbytery of Washington City records, 1823-1950.
- Presbyterian Church in the U.S.A. Presbytery of Washington City records, 1823-1950.
- Preston family. Campbell-Preston-Floyd families papers, 1741-1931.
- Preston family papers.
- Price family papers, 1854-1905.
- Price family. Price family papers, 1854-1905.
- Price, John H., active 1861-1865. John H. Price papers.
- Price, William George, 1833-1885. William George Price papers.
- Price, William George, 1867-1944. William George Price papers.
- Prince, Willard B., 1888-1949. Willard B. Prince collection of World War I maps and related materials.
- Princess Marie Bonaparte papers, 1889-1962.
- Prints and bookplates by Sidney Lawton Smith.
- Pritchett, Henry S. (Henry Smith), 1857-1939. Henry S. Pritchett correspondence. 1901-1910.
- Pritchett, Henry S. (Henry Smith), 1857-1939. Henry S. Pritchett papers, 1876-1967.
- Pritchett, Henry S. (Henry Smith), 1857-1939. What is religion? and other student questions; talks to college students. 1906.
- Procter, John Robert, 1844-1903. John Robert Procter papers, 1867-1903.
- Progressive military maps of the United States.
- Puerto Rican memorial collection, 1519-1923.
- Puleston, W. D. (William Dilworth), 1881- W.D. Puleston research and writings file. 1806-1939.
- Pulitzer, Joseph, 1847-1911. Joseph Pulitzer papers, 1880-1924.
- Purdy, Ray Foote, 1898-1965. Ray Foote Purdy papers. 1812-1974.
- Pusey, Merlo J. (Merlo John), 1902-1985. Merlo John Pusey papers.
- Putnam, Brenda, 1890-1975. Brenda Putnam correspondence.
- Putnam, C. H. (Catherine Hunt), 1792- C.H. Putnam correspondence.
- Putnam, Charlotte Elizabeth Munroe, -1928. Charlotte Elizabeth Munroe Putnam correspondence.
- Putnam, George Palmer, 1814-1872. George Palmer Putnam correspondence.
- Putnam, Harrington, 1851-1937. Harrington Putnam papers, 1909-1928.
- Putnam, Herbert, 1861-1955. Herbert Putnam papers, 1783-1958.
- Putnam, Israel, 1718-1790. Israel Putnam correspondence.
- Putnam, Ruth, 1856-1931. Ruth Putnam correspondence and diaries.
- Pyle, Stephen D. (Stephen Donald), 1888-1969. Stephen D. Pyle papers, 1924-1927.
Q
- Quay, Matthew Stanley, 1833-1904. Matthew Stanley Quay papers, 1776-1949.
- Queenstown Association (U.S.). Queenstown Association (U.S.) records, 1913-1980.
- Queenstown Association (U.S.) records, 1913-1980.
R
- Rachmaninoff, Sergei, 1873-1943. Sergei Rachmaninoff archive, 1872-1992.
- Rainey, Henry Thomas, 1860-1934. Henry Thomas Rainey papers, 1904-1934.
- Ralph Block papers, 1872-1971.
- Rand, Wallace E., 1897-1918. Wallace E. Rand collection 1893-1919.
- Randall, J. G. (James Garfield), 1881-1953. J.G. Randall and Ruth Painter Randall papers, 1779-1970.
- Randall, Ruth Painter. J.G. Randall and Ruth Painter Randall papers. 1779-1970.
- Raoul Heilbronner papers, 1887-1952.
- Rash, Bryson B. Bryson B. Rash papers, 1918-1992.
- Rawleigh, William Thomas, 1870-1951. William Thomas Rawleigh papers, 1911-1931.
- Ray & Waggaman collection.
- Ray architectural drawing archive (Library of Congress).
- Ray collection.
- Ray Eber Brown papers, 1915-1962.
- Ray, Luther R. (Luther Reason), 1892-1978. Ray architectural drawing archive (Library of Congress).
- Ray Stannard Baker papers, 1836-1947.
- Raymond Clapper papers, 1908-1962.
- Raymond G. Carroll papers, 1905-1944.
- Raymond Leslie Buell papers, 1915-1981.
- Raymond Rubicam papers, 1921-1988.
- R.C. Leffingwell letterbooks, 1917-1920.
- R.C. Leffingwell papers.
- Read family papers, 1568-1906.
- Read family. Read family papers, 1568-1906.
- Read, George, 1733-1798. George Read papers.
- Read, George, 1765-1836. George Read papers.
- Read, James, 1743-1822. James Read papers.
- Read, John, 1769-1854. John Read papers.
- Read, John M. (John Meredith), 1797-1874. John M. Read papers.
- Read, John Meredith, 1837-1896. John Meredith Read papers.
- Real Sociedad Económica de Amigos del País (Cuba). Real Sociedad Económica de Amigos del Pais (Cuba) records. 1863-1869.
- Ream, Vinnie, 1847-1914. Vinnie Ream and R.L. Hoxie papers, 1853-1937.
- Rebekah Crawford and Linda Clarke-Smith papers, 1715-1929.
- Reeves, Arthur Middleton, 1856-1891. Arthur Middleton Reeves papers.
- Reeves, Mark E. Mark E. Reeves papers.
- Reginald Rowan Belknap papers, 1784-1929.
- Reich, Wilhelm, 1897-1957. Wilhelm Reich papers, 1920-1952.
- Reid, Elisabeth Mills, 1858-1931. Elisabeth Mills Reid papers.
- Reid family map collection.
- Reid family papers, 1795-2003.
- Reid family. Reid family papers, 1795-1970.
- Reid Foundation. Reid Foundation records. 1944-1958.
- Reid, Helen Rogers, 1882-1970. Helen Rogers Reid papers.
- Reid, Ogden Mills, 1882-1947. Ogden Mills Reid papers.
- Reid, Whitelaw, 1837-1912. Whitelaw Reid papers.
- Reid, Whitelaw, 1913-2009. Whitelaw Reid papers.
- Remey, Charles Mason, 1874-1974. Charles Mason Remey family papers, 1778-1949.
- Remey family. Charles Mason Remey family papers, 1778-1949.
- Remey, George Collier, 1841-1928. George Collier Remey papers.
- Remey, Mary Josephine Mason, 1845-1938. Mary Josephine Mason Remey papers.
- Reproductions of selected Percy Grainger papers, 1909-1952.
- Republican campaign collection, 1902-1926.
- Restout, Denise. Wanda Landowska and Denise Restout papers, circa 1850s-1969.
- Reynolds, Joseph Jones, 1822-1899. Joseph Jones Reynolds papers.
- Reynolds, Juliana Smith. Juliana Smith Reynolds papers.
- Reynolds, Tilton C., 1843-1913. Tilton C. Reynolds papers, 1851-1963.
- Richard Edes Harrison maps and papers collection.
- Richard Koszarski collection of research material on the early history of Universal Pictures Corporation, 1906-1996.
- Richard M. Look map collection.
- Richard Mansfield papers.
- Richard Olney papers, 1830-1928.
- Richard Sharpe Patterson papers, 1776-1998.
- Richards, Grant, 1872-1948. Grant Richards collection of A.E. Housman material, 1898-1947.
- Richards, William Henry, 1856-1941. William Henry Richards papers, 1856-1946.
- Richardson, Holden Chester, 1878- Holden Chester Richardson papers, 1844-1946.
- Richardson, Nina Maud. Nina Maud Richardson papers.
- Richmond Pearson Hobson papers, 1889-1966.
- Rickenbacker, Eddie, 1890-1973. Eddie Rickenbacker papers, 1915-1973.
- Rigby family papers.
- Rigby family. Tunnicliff, Rigby, and Staton families papers, 1854-1990.
- Riggs, Brett. Brett Riggs influenza pandemic archive, 1891-1945.
- Riggs, Elisha, 1779-1853. Elisha Riggs papers. 1813-1896.
- Riggs, Elisha, 1826-1881. Elisha Riggs papers. 1844-1890.
- Riggs, Elisha Francis, 1851-1910. Elisha Francis Riggs papers. 1860-1910.
- Riggs, Elisha Francis, 1887-1936. Elisha Francis Riggs papers. 1887-1935.
- Riggs family papers, 1763-1945.
- Riggs family. Riggs family papers, 1763-1945.
- Riggs, George Washington, 1813-1881. George Washington Riggs papers. 1836-1881.
- Riggs, Romulus, 1782-1846. Romulus Riggs papers. 1821-1882.
- Riggs, T. Lawrason (Thomas Lawrason), 1888-1943. T. Lawrason Riggs papers. 1790-1943.
- Riggs, Thomas, 1873-1945. Thomas Riggs papers. 1887-1945.
- Riggs, William Henry, 1837-1924. William Henry Riggs papers. 1850-1912.
- Rihani, Ameen Fares, 1876-1940. Ameen Fares Rihani papers, 1897-1940.
- Riis, Jacob A. (Jacob August), 1849-1914. Jacob A. Riis papers, 1870-1990.
- Riis, Roger William, 1894-1953. Roger William Riis papers, 1903-1990.
- Riley, James Whitcomb, 1849-1916. James Whitcomb Riley papers, 1883-1915.
- Rioch family papers.
- Rioch family. Pierson, Rioch, and Layton families papers, 1777-2012.
- Ritchie, Jean. Jean Ritchie and George Pickow collection, 1923-2015.
- Robbins, Henry Alfred, 1839-1911. Henry Alfred Robbins journals. 1870-1904.
- Robbins, Howard Elbridge, 1888-1963. Howard Elbridge Robbins collection 1918.
- Robbins, Thomas H. (Thomas Hinckley), 1900-1972. Thomas H. Robbins papers, 1918-1971.
- Robert A. Lavender papers, 1911-1976.
- Robert C. Ogden papers, 1843-1913.
- Robert E. Sherwood papers.
- Robert E. Sherwood play scripts, 1921-1962.
- Robert Emmet Sherwood papers.
- Robert Frost papers.
- Robert H. McNeill family papers, 1839-2008.
- Robert H. Terrell papers, 1870-1954.
- Robert, Henry M. (Henry Martyn), 1837-1923. Henry M. Robert papers, 1853-1937.
- Robert Lansing papers, 1831-1959.
- Robert Latham Owen papers, 1910-1941.
- Robert Lee Bullard papers, 1881-1955.
- Robert McNutt McElroy papers, circa 1909-1924.
- Robert Patterson Hughes papers, 1876-1994.
- Robert R. Hitt papers, 1830-1906.
- Robert Staughton Lynd and Helen Merrell Lynd papers, 1895-1968.
- Robert Staughton Lynd papers.
- Robert Todd Lincoln family papers, 1864-1938.
- Robert W. Bonynge papers, 1881-1939.
- Robert Wickliffe Woolley papers, 1842-1956.
- Robert Winslow Gordon papers, 1840-1961.
- Roberts, Elizabeth Madox, 1881-1941. Elizabeth Madox Roberts papers, 1921-1941.
- Roberts family. Joseph J. Roberts family papers, 1839-2001.
- Roberts family papers.
- Roberts, Joseph J. (Joseph Jenkins), 1809-1876. Joseph J. Roberts family papers, 1839-2001.
- Roberts, Kenneth Lewis, 1885-1957. Kenneth Lewis Roberts papers, 1919-1956.
- Robertson, James Alexander, 1873-1939. James Alexander Robertson papers, 1816-1939.
- Robinson, Edwin Arlington, 1869-1935. Edwin Arlington Robinson papers, 1913-1940.
- Robinson, Lydia S. M. Lydia S.M. Robinson collection relating to World War I, 1914-1942.
- Robles, Sebastian T. (Sebastian Tomas), 1901-1959. Sebastian T. Robles cartoon. 1934.
- Robson, May, 1858-1942. May Robson papers, 1849-1955.
- Rodgers family papers, 1740-1987.
- Rodgers family papers, 1788-1944.
- Rodgers family. Rodgers family papers, 1740-1987.
- Rodgers family. Rodgers family papers, 1788-1944.
- Rodgers, Frederick, 1842-1917. Frederick Rodgers papers, 1852-1920.
- Rodgers, John, 1773-1838. John Rodgers papers. (2)
- Rodgers, John, 1812-1882. John Rodgers papers.
- Rodgers, John, 1881-1926. John Rodgers papers.
- Rodgers, John Augustus, 1848-1933. John Augustus Rodgers papers.
- Rodgers, Minerva Denison, 1784-1877. Minerva Denison Rodgers papers.
- Rodgers, William Ledyard, 1860-1944. William Ledyard Rodgers papers.
- Rodolfo R. Schuller papers, 1492-1915.
- Rodríguez, José Ignacio, 1831-1907. José Ignacio Rodríguez papers, 1860-1907.
- Roe, Gilbert E. (Gilbert Ernstein), 1865-1929. Gilbert E. Roe papers. 1887-1961.
- Roger Welles papers, 1884-1926.
- Roger William Riis papers, 1903-1990.
- Rogers, Alfred Thomas, 1873-1948. Alfred Thomas Rogers papers. 1900-1928.
- Rogers, Bruce, 1870-1957. Pforzheimer collection of Bruce Rogers materials, 1200-1957.
- Rogers, Leighton W. (Leighton William), 1893-1962. Leighton W. Rogers papers, 1912-1982.
- Rohe, Alice, 1876-1957. Alice Rohe papers, 1914-1919.
- Roland S. Morris papers, 1910-1943.
- Romanucci-Ross, Lola. Lola Romanucci-Ross papers.
- Ronsheim, Milton 1894-1968 Louis Milton Ronsheim collection, 1914-2000.
- Roosevelt, Archibald, Jr., 1918-1990. Archibald Roosevelt Jr. papers.
- Roosevelt, Belle, 1892-1968. Kermit Roosevelt and Belle Roosevelt papers. 1885-1975.
- Roosevelt, Eleanor Butler, 1888-1960. Eleanor Butler Roosevelt papers.
- Roosevelt, Kermit, 1889-1943. Kermit Roosevelt and Belle Roosevelt papers, 1725-1975.
- Roosevelt, Theodore, 1858-1919. Theodore Roosevelt papers, 1759-1993.
- Roosevelt, Theodore, Jr., 1887-1944. Theodore Roosevelt Jr. papers, 1780-1962.
- Root, Elihu, 1845-1937. Elihu Root papers, 1863-1937.
- Roper, Laura Wood, 1911-2003. Laura Wood Roper map collection. (2)
- Roper, Laura Wood, 1911-2003. Laura Wood Roper papers.
- Roper, Laura Wood, 1911-2003. Laura Wood Roper papers, 1822-1982.
- Rosa Freud Graf papers, 1879-1942.
- Rosamond Pinchot papers, 1918-1955.
- Rose Marie and Harold Spivacke Fund collection.
- Rose Marie Grentzer and Harold Spivacke Fund collection, 1615-1994.
- Ross A. Collins papers, 1906-1967.
- Roswell Randall Hoes papers, 1799-1912.
- Rotch, Abbott Lawrence, 1861-1912. Abbott Lawrence Rotch papers 1896-1912.
- Rouben Mamoulian papers, 1740-1987.
- Rowland V. Lee papers, 1907-1971.
- Roy Wilson Howard papers, 1911-1966.
- Royal E. Ingersoll papers.
- Royal Rodney Ingersoll and Royal E. Ingersoll papers, 1866-1935.
- Royal Rodney Ingersoll papers.
- R.R. Bowker papers, 1831-1931.
- Rubicam, Raymond, 1892-1978. Raymond Rubicam papers, 1921-1988.
- Rudolf Kolisch collection, 1921-1943.
- Rudolph and Joseph Schildkraut scrapbooks, 1867-1964.
- Rudolph, Cuno Hugo, 1860-1932. Cuno Hugo Rudolph scrapbooks, 1910-1929.
- Rudolph Forster papers, 1898-1943.
- Russell, Charles Edward, 1860-1941. Charles Edward Russell papers, 1864-1941.
- Russell, Clyde Wilbur, 1888-1973. Clyde Wilbur Russell collection, 1917-1919.
- Russell Sage Foundation records, 1908-1942.
- Russell Sage Foundation. Russell Sage Foundation records, 1908-1942.
- Russia miscellany, 1759-1928.
- Russian Orthodox Greek Catholic Church of America. Diocese of Alaska records, 1733-1938.
- Russian Orthodox Greek Catholic Church of America. Diocese of Alaska. Russian Orthodox Greek Catholic Church of America. Diocese of Alaska records, 1733-1938.
- Ruth Painter Randall papers.
- Ruthven Deane bookplate collection.
- Rylʹsʹkyĭ Institute Ukrainian cylinder collection, 1908-1930s.
S
- Sacco-Vanzetti Defense Committee. Sacco-Vanzetti Defense Committee bulletins. 1926-1930.
- Sacco-Vanzetti National League. Sacco-Vanzetti National League bulletins. 1929.
- Salomea Isakower papers.
- Samuel Chiles Mitchell papers, 1903-1913.
- Samuel Franklin Emmons papers, 1725-1914.
- Samuel Guy Inman papers, 1901-1965.
- Samuel J. Woolf collection.
- Samuel McGowan papers, 1883-1943.
- Samuel P. Warren collection, 1849-1915.
- Samuel W. Dike papers, 1870-1913.
- Samuel Whittemore Boggs papers, 1912-1954.
- Sandburg, Carl, 1878-1967. Carl Sandburg poetry drafts.
- Sanders, Everett, 1882-1950 Everett Sanders papers, 1913-1950.
- Sándor Lorand papers, 1914-1978.
- Sapoznik, Henry. Henry Sapoznik collection, circa 1920-1960.
- Sarah Stone autograph collection, 1720-1962.
- Sardeau, Hélène, 1899-1969. Hélène Sardeau papers.
- Sargent, Harry N. Harry N. Sargent papers, 1917-1920.
- Sargent, Nathan, 1849-1907. Nathan Sargent papers, 1866-1957.
- Sayers, Isabelle S. Isabelle Sayers papers, circa 1886-1980.
- Sayre, Francis Bowes, 1885-1972. Francis Bowes Sayre papers, 1861-1967.
- Scala, Francis Maria, 1819?-1903. Francis Maria Scala papers, 1816-2013.
- Schildkraut, Joseph, 1895-1964. Rudolph and Joseph Schildkraut scrapbooks. 1867-1964.
- Schildkraut, Leonora. Rudolph and Joseph Schildkraut scrapbooks, 1867-1964.
- Schildkraut, Rudolph. Rudolph and Joseph Schildkraut scrapbooks, 1867-1964.
- Schirmer, Gustave, 1864-1907. Grace and Gustave Schirmer correspondence and other papers, 1845-1949.
- Schmitt, Bernadotte Everly, 1886-1969. Bernadotte Everly Schmitt papers, 1868-1970.
- Schnabel, Artur, 1882-1951. Artur Schnabel collection, 1899-1950.
- Schneider, Anne Kaufman. George S. Kaufman and Anne Kaufman Schneider papers. circa 1892-1998.
- Schneider, J. Thomas (John Thomas), 1895-1976. J. Thomas Schneider map collection.
- Schneider, J. Thomas (John Thomas), 1895-1976. J. Thomas Schneider papers.
- Schneider, J. Thomas (John Thomas), 1895-1976. J. Thomas Schneider papers, 1915-1960.
- Schoen, Aaron. Aaron Schoen World War I map collection.
- Schoenberg, Arnold, 1874-1951. Arnold Schoenberg correspondence and other papers, 1894-1959.
- Scholz, Philip E., 1895-1962. Philip E. Scholz collection, 1918-1920.
- Schuller, Gunther. Gunther Schuller papers, 1615-2014.
- Schuller, Rodolfo R., 1873-1932. Rodolfo R. Schuller papers, 1492-1915.
- Schur, Max. Max Schur papers, 1923-1974.
- Schurz, Carl, 1829-1906. Carl Schurz papers, 1837-1983.
- Schwartz, Theodore. Theodore Schwartz papers.
- Scott, Hugh Lenox, 1853-1934. Hugh Lenox Scott papers, 1582-1981.
- Scott, Julia Green, 1839-1923. Julia Green Scott papers.
- Scott, William McKendree, 1817-1861. William McKendree Scott journal. 1845.
- Scudder Klyce papers, 1911-1933.
- See, T. J. J. (Thomas Jefferson Jackson), 1866- T.J.J. See papers, 1887-1960.
- Seeger, Charles, 1886-1979. Seeger family collection, 1846-2023.
- Seeger family collection, 1846-2023.
- Select papers from the George Kleine film collection, 1886-1946.
- Selman A. Waksman papers, 1915-1960.
- Selman Abraham Waksman papers.
- Senegal map collection, 1690-1973.
- Serge Diaghilev/Serge Lifar collection, 1750-1950.
- Serge Grigoriev / Ballets Russes archive, 1909-2009.
- Serge Koussevitzky archive, 1880-1978.
- Serge Lifar collection on Serge Diaghilev, 1750-1950.
- Sergei Rachmaninoff archive, 1872-1992.
- Sergius Pankejeff papers, 1901-1979.
- Severn, Elizabeth. Elizabeth Severn and Margaret Severn papers, 1880-1994.
- Severn, Margaret. Elizabeth Severn and Margaret Severn papers. 1880-1993.
- Sewall-Belmont House. Sewall-Belmont House records.
- Shaker collection of records concerning the United Society of Believers in Christ's Second Appearing, 1676-1937.
- Sheets, Henry Harrison. Henry Harrison Sheets papers.
- Sheldon, Mary French, 1847-1936. Mary French Sheldon papers, 1885-1938.
- Shemonsky, Peter, 1878-1943. Peter Shemonsky collection, 1899-1970.
- Shepherd, William R. (William Robert), 1871-1934. William R. Shepherd papers, 1554-1931.
- Sherwood, Robert E. (Robert Emmet), 1896-1955. Robert E. Sherwood play scripts, 1921-1962.
- Shippen, Alice Lee, 1736-1817. Alice Lee Shippen papers. (2)
- Shippen, Edward, 1826-1911. Edward Shippen papers.
- Shippen family papers, 1671-1936.
- Shippen family. Shippen family papers, 1671-1936.
- Shippen, Thomas Lee, 1765-1798. Thomas Lee Shippen papers. (2)
- Shippen, William, Jr., 1736-1808. William Shippen Jr. papers. (2)
- Shippen, William, Sr., 1712-1801. William Shippen Sr. papers.
- Shriner, Sara, 1904-2003. Sara Shriner papers.
- Shuster, W. Morgan (William Morgan), 1877-1960. W. Morgan Shuster papers, 1900-1964.
- Sickles, Daniel Edgar, 1819-1914. Daniel Edgar Sickles papers, 1821-1918.
- Sidell, William Henry, 1810-1873. William Henry Sidell papers. 1849.
- Sidonie Matsner Gruenberg papers.
- Sigmund Freud collection. (17)
- Sigmund Freud papers and collection.
- Sigmund Freud papers, circa 6th century BCE-1998 CE.
- Silas Casey papers, 1771-1941.
- Simmons, Hiram, 1874-1938. Bertha W. Edwards collection on Hiram Simmons, 1907-1980.
- Simms, Ruth Hanna McCormick, 1880-1944. Ruth Hanna McCormick Simms papers.
- Simon Newcomb papers, 1813-1949.
- Simonds, George Sherwin, 1874-1938. George Sherwin Simonds papers, 1894-1937.
- Simons, Alfred E. Alfred E. Simons papers.
- Simons family papers, 1887-1982.
- Simons family. Simons family papers, 1887-1982.
- Simons, William H., 1881-1938. William H. Simons papers.
- Simons, William H., 1924- William H. Simons papers.
- Sims, Anne Hitchcock, 1875-1960. Anne Hitchcock Sims papers.
- Sims, William Sowden, 1858-1936. William Sowden Sims papers, 1856-1951.
- Sioussat, St. George L. (St. George Leakin), 1878-1960. St. George L. Sioussat papers, 1831-1959.
- Sir Francis Joseph Campbell papers, 1870-1935.
- Sirch, Charles W. Charles W. Sirch papers, 1878-1935.
- Sisson, Nathaniel, 1845-1932. Nathaniel Sisson papers, 1838-1932.
- Skidmore, Louis, 1897-1962. Louis Skidmore papers, 1908-1976.
- Slonimsky, Nicolas, 1894-1995. Nicolas Slonimsky collection, 1873-1997.
- Smith, Charles Perley, 1878-1948. Charles Perley Smith papers, 1920-1946.
- Smith Ely Jelliffe papers, 1882-1977.
- Smith, Erwin F. (Erwin Frink), 1854-1927. Erwin F. Smith papers, 1876-1927.
- Smith, Herbert A. (Herbert Augustine), 1866-1944. Herbert A. Smith papers.
- Smith, Horatio Davis, 1845-1918. Horatio Davis Smith papers.
- Smith, Leonard B. (Leonard Bingley), 1915-2002. Leonard B. Smith papers, 1859-2001.
- Smith, Logan Pearsall, 1865-1946. Logan Pearsall Smith papers, 1760-1946.
- Smith, Sidney Lawton, 1845-1929. Prints and bookplates by Sidney Lawton Smith.
- Snodgrass family. Ham, Connelly, Parks, and Snodgrass families papers, 1870-2018.
- Snodgrass family papers.
- Snow, Elliot, 1866-1939. Elliot Snow papers, 1790-1942.
- Snowden, Anna Jean, approximately 1895- Anna Jean Snowden papers, 1910-1949.
- Society for the Preservation of the American Musical Heritage collection, 1792-1969.
- Society of Woman Geographers records, 1905-2015.
- Society of Woman Geographers. Society of Woman Geographers records, 1905-2015.
- Solano, Solita, 1888-1975. Visual materials from the Janet Flanner and Solita Solano papers.
- Solberg, Thorvald, 1852-1949. Thorvald Solberg papers, 1882-1949.
- Solomon, Hannah G. (Hannah Greenebaum), 1858-1942. Hannah G. Solomon papers, 1817-1986.
- Solon Hannibal Borglum papers, 1886-1969.
- Sousa, John Philip, 1854-1932. Christopher Dodrill collection on John Philip Sousa, 1876-1992.
- Sousa, John Philip, 1854-1932. John Philip Sousa collection 1849-2004.
- Sousa, John Philip, 1854-1932. Music of the Sousa Band and Victor Grabel, 1861-1954.
- Sousa, John Philip, 1854-1932. Works. Selections.
- Souvenir viewbook booklets of Washington, D.C., and environs.
- Sperry, Charles S. (Charles Stillman), 1847-1911. Charles S. Sperry papers, 1862-1912.
- Spialek, Hans. Hans Spialek papers, 1895-1984.
- Spingarn, Arthur B. (Arthur Barnett), 1878-1971. Arthur B. Spingarn papers, 1850-1968.
- Spivacke fund (Rose Marie and Harold Spivacke) collection.
- Spooner, John C. (John Coit), 1843-1919. John C. Spooner papers, 1855-1909.
- St. George L. Sioussat papers, 1831-1959.
- Staatliche Bildstelle (Prussia, Germany). Photographs selected from the Königliche Preussische Messbildanstalt.
- Stacy Conrad Farrior family papers, 1907-1949.
- Stanford Caldwell Hooper papers, 1899-1955.
- Stanton, Elizabeth Cady, 1815-1902. Elizabeth Cady Stanton papers, 1814-1946.
- Staton family papers.
- Staton family. Tunnicliff, Rigby, and Staton families papers, 1854-1990.
- Stedman, Edmund Clarence, 1833-1908. Edmund Clarence Stedman papers, 1871-1923.
- Stephen Bleecker Luce papers, 1799-1955.
- Stephen Bonsal papers, 1890-1973.
- Stephen D. Pyle papers, 1924-1927.
- Stephenson, John Aldrich. John Aldrich Stephenson collection of the Hand, Fiske, and Aldrich families papers. 1745-1966.
- Stephenson, Nathaniel W. (Nathaniel Wright), 1867-1935. Nathaniel W. Stephenson biographer's papers. 1860-1930.
- Stephenson, Nathaniel W. (Nathaniel Wright), 1867-1935. Nathaniel W. Stephenson papers.
- Stereographs showing staged story sequences.
- Stevenson, Burton Egbert, 1872-1962. Burton Egbert Stevenson papers, 1900-1951.
- Stewart, Emily A. Emily A. Stewart collection of Elihu Root material, 1885-1959.
- Stickney, Frank L., 1858-1940. Frank L. Stickney papers, 1850-1938.
- Stiga, Paul F., 1936-2019. Paul F. Stiga collection of stage and costume design, 1821-2017.
- Stock, Leo Francis, 1878-1954. Leo Francis Stock papers.
- Stone, Irving, 1903-1989. Irving Stone papers.
- Stone, Sarah, active 1840. Sarah Stone autograph collection, 1720-1962.
- Storey, Moorfield, 1845-1929. Moorfield Storey papers, 1876-1929.
- Stotesbury collection of World War I clippings, 1914-1918.
- Stotesbury, Eva Roberts Cromwell. Stotesbury collection of World War I clippings, 1914-1918.
- Stout, Wesley Winans, 1890- Wesley Winans Stout papers, 1913-1954.
- Stowell, Ellery C. (Ellery Cory), 1875-1958. Ellery C. Stowell papers, 1805-1952.
- Strasberg, Lee. Lee Strasberg papers, 1780-2006.
- Straus, Oscar S. (Oscar Solomon), 1850-1926. Oscar S. Straus papers, 1856-1955.
- Strauss, Joseph, 1861-1948. Joseph Strauss papers, 1884-1949.
- Sullivan, Mark, 1874-1952. Mark Sullivan papers, 1900-1935.
- Summerall, Charles Pelot, 1867-1955. Charles Pelot Summerall map collection. (3)
- Summerall, Charles Pelot, 1867-1955. Charles Pelot Summerall papers.
- Summerall, Charles Pelot, 1867-1955. Charles Pelot Summerall papers, 1880-1955.
- Sunday, Billy, 1862-1935. William L. Daley collection relating to Billy Sunday, 1914-1925.
- Susan B. Anthony Foundation, Washington, D.C., records, 1895-1943.
- Susan B. Anthony Foundation (Washington, D.C.). Susan B. Anthony Foundation, Washington, D.C., records, 1895-1943.
- Susan B. Anthony papers, 1846-1934.
- Susan Brownell Anthony papers.
- Sutherland, George, 1862-1942. George Sutherland papers, 1850-1944.
- Sweetser, Arthur, 1888-1968. Arthur Sweetser papers, 1913-1961.
- Swift, Ernest John. Ernest John Swift papers, 1908-2019.
- Swisher, Carl Brent, 1897-1968. Carl Brent Swisher collection of research material relating to Roger Brooke Taney, 1836-1962.
- Symington, Evelyn Wadsworth, 1903-1972. Evelyn Wadsworth Symington collection of John Hay material, 1864-1905.
T
- T. De Witt Talmage papers, 1831-1902.
- T. Swann Harding papers, 1918-1963.
- Tabor, Edward Otto, 1885-1948. Edward Otto Tabor papers, 1918-1948.
- Taft, Alphonso, 1810-1891. Alphonso Taft papers.
- Taft, Charles P. (Charles Phelps), 1897-1983. Charles P. Taft map collection.
- Taft, Charles P. (Charles Phelps), 1897-1983. Charles P. Taft papers, 1816-1983.
- Taft, Helen Herron, 1861-1943. Helen Herron Taft papers.
- Taft, Louise Maria Torrey, 1827-1907. Louise Maria Torrey Taft papers.
- Taft, William H. (William Howard), 1857-1930. William H. Taft papers, 1784-1973.
- Taft, William Howard, 1915-1991. William Howard Taft papers, 1915-1953.
- Talcott, Charles G. (Charles Gratiot) Charles G. Talcott papers.
- Talcott, Theodosia L. Theodosia L. Talcott papers.
- Talma, Louise, 1906-1996. Louise Talma papers, 1861-1998.
- Talmage, T. De Witt (Thomas De Witt), 1832-1902. T. De Witt Talmage papers, 1831-1902.
- Tams-Witmark collection, 1701-1915.
- Tams-Witmark (Original Library of Congress collection), 1701-1915.
- Tanner, Benj. T. (Benjamin Tucker), 1835-1923. Benjamin T. Tanner papers. 1827-1872.
- Tanneyhill, Ann. Ann Tanneyhill papers, 1879-2012.
- Tasker Howard Bliss collection of World War I maps and related materials.
- Tasker Howard Bliss papers, 1864-1933.
- Taylor, Montgomery Meigs, 1869-1952. Montgomery Meigs Taylor papers, 1890-1935.
- Taylor, Zachary, 1784-1850. Zachary Taylor papers, 1814-1931.
- Tee-Van, Helen Damrosch, 1893-1976. Damrosch - Tee Van Collection. 1856-1969.
- Terhune, Albert Payson, 1872-1942. Albert Payson Terhune papers, 1890-1957.
- Terrell, Mary Church, 1863-1954. Mary Church Terrell papers, 1851-1962.
- Terrell, Robert H. (Robert Heberton), 1857-1925. Robert H. Terrell papers, 1870-1954.
- Terry, Thomas Estévez, 1893-1969. Thomas Estévez Terry collection, 1918-1919.
- Tesla, Nikola, 1856-1943. Nikola Tesla correspondence, 1890-1934.
- T.H. Gallaudet and Edward Miner Gallaudet papers, 1806-1958.
- T.H. Gallaudet papers.
- Tharp, Marie. Heezen-Tharp collection.
- Tharp, Marie. Heezen-Tharp collection : Antarctica.
- Tharp, Marie. Heezen-Tharp collection : Arctic Ocean.
- Tharp, Marie. Heezen-Tharp collection : Atlantic Ocean.
- Tharp, Marie. Heezen-Tharp collection : Indian Ocean.
- Tharp, Marie. Heezen-Tharp collection : Pacific Ocean.
- Tharp, Marie. Heezen-Tharp collection : World/Miscellaneous.
- The Office of Strategic Services maps on microfilm collection.
- Theater programs, playbills and miscellany from the Rouben Mamoulian Collection.
- Theo. A. Bingham papers, 1897-1903.
- Theodore Gordon Ellyson papers, 1912-1951.
- Theodore Marburg papers, 1856-1940.
- Theodore Presser Company archive, 1814-2019.
- Theodore Presser Company collection.
- Theodore Presser Company. Theodore Presser Company archive, 1814-2019.
- Theodore Roosevelt Jr. papers, 1780-1962.
- Theodore Roosevelt papers, 1759-1993.
- Theodore Sherman Palmer papers.
- Theodore Stark Wilkinson Jr. papers, 1893-1971.
- Thomas A. Edison, Inc. Edison sheet music collection, 1830-1958.
- Thomas Bailey Aldrich papers, 1873-1901.
- Thomas Capek collection of materials relating to Czechoslovakia and Czech Americans, 1619-1953.
- Thomas Estévez Terry collection, 1918-1919.
- Thomas H. Ince papers, 1913-1964.
- Thomas H. Robbins papers, 1918-1971.
- Thomas Henry Carter papers, 1883-1917.
- Thomas James Walsh and John Edward Erickson papers, 1910-1934.
- Thomas James Walsh papers.
- Thomas Kimmwood Peters papers, 1896-1973.
- Thomas Mann papers, 1909-1947.
- Thomas Sidney Jesup papers, 1780-1907.
- Thomas Swann Harding papers.
- Thomas T. Craven papers, 1842-1969.
- Thomas Tileston Waterman architectural drawing archive.
- Thomas Tileston Waterman archive.
- Thomas Watt Gregory papers, 1896-1933.
- Thompson, LeRoy Feay, 1894-1996. LeRoy Feay Thompson collection 1918-2011.
- Thomsen, Alice Barnard, 1912- Baldwin-Ziegler Polar Expedition history. circa 1993.
- Thorndike, Edward L. (Edward Lee), 1874-1949. Edward L. Thorndike papers, 1900-1938.
- Thorndike, Edward L. (Edward Lee), 1874-1949. Semantic count of English words. 1938.
- Thorvald Solberg papers, 1882-1949.
- Ticknor, Benjamin Holt, 1842-1914. Benjamin Holt Ticknor papers, 1595-1935.
- Ticknor, Caroline, 1866-1937. Caroline Ticknor correspondence.
- Tilton C. Reynolds papers, 1851-1963.
- Tissandier, Albert, 1839-1906. Tissandier collection on the history of aeronautics. 1539-1929.
- Tissandier collection on the history of aeronautics, 1539-1929.
- Tissandier, Gaston, 1843-1899. Tissandier collection on the history of aeronautics, 1539-1929.
- Tissandier, Paul, 1881- Tissandier collection on the history of aeronautics. 1539-1929.
- T.J.J. See papers, 1887-1960.
- T.M. Cleland papers, 1880-1964.
- Tom J. Geraghty papers, 1923-1965.
- Tompkins, Daniel Augustus, 1851-1914. Daniel Augustus Tompkins papers, 1887-1920.
- Tonopah Mining Company records, 1901-1976.
- Tonopah Mining Company. Tonopah Mining Company records, 1901-1976.
- Torrey, Delia C. Delia C. Torrey papers.
- Tournemire, Charles, 1870-1939. Charles Tournemire collection, circa 1868-1962.
- Towers, John H. (John Henry), 1885-1955. John H. Towers papers, 1830-1989.
- Towers, Pierrette Anne. Pierrette Anne Towers papers.
- Towers, William M. William M. Towers papers.
- Tracy, George Lowell, 1855-1921. George L. Tracy collection of music manuscripts, 1877-1920.
- Train, Charles Russell, 1879-1967. Charles Russell Train papers, 1898-1967.
- Traubel, Anne Montgomerie, 1864-1954. Anne Montgomerie Traubel papers.
- Traubel, Anne Montgomerie, 1864-1954. Horace Traubel and Anne Montgomerie Traubel papers. 1824-1979.
- Traubel, Gertrude. Gertrude Traubel papers. 1880-1979.
- Traubel, Horace, 1858-1919. Horace Traubel and Anne Montgomerie Traubel papers, 1824-1979.
- Traubel, Horace, 1858-1919. Horace Traubel papers.
- Truxtun, Thomas, 1755-1822. Thomas Truxton papers.
- T.S. Palmer papers, 1877-1954.
- Tucker, George Edwin. George Edwin Tucker papers.
- Tucker, Mary Logan, 1858-1940. Mary Logan Tucker papers.
- Tumulty, Joseph P. (Joseph Patrick), 1879-1954. Joseph P. Tumulty papers, 1898-1969.
- Tunnicliff family papers.
- Tunnicliff family. Tunnicliff, Rigby, and Staton families papers, 1854-1990.
- Tunnicliff, Rigby, and Staton families papers, 1854-1990.
- Turner, Justin G. Justin G. Turner autograph collection, 1763-1968.
- Twitchell, Kenaston. Kenaston Twitchell papers. 1924-1991.
- Tyler Dennett collection relating to John Hay, 1861-1937.
- Tyler Dennett papers.
- Tyler, John, 1790-1862. John Tyler papers, 1691-1918.
- Tyler, Julia Gardiner, 1820-1889. Julia Gardiner Tyler papers.
- Tyler, Lyon Gardiner, 1853-1935. Lyon Gardiner Tyler papers.
U
- Ukrainian cylinder collection.
- Underwood, Norman, 1878-1974. Norman Underwood papers.
- Underwood, Wilbur, 1876-1935. Wilbur Underwood papers, 1895-1969.
- United States. American Commission to Negotiate Peace records, 1898-1919.
- United States. American Commission to Negotiate Peace. United States. American Commission to Negotiate Peace records, 1898-1919.
- United States Army Corps of Engineers. Progressive military maps of the United States.
- United States. Army. Division, 2nd. United States Army 2nd Division records.
- United States. Commission for the Construction of the Congressional Library Building. U.S. Commission for the Construction of the Congressional Library Building records.
- United States. Congress. Senate. Committee on Finance. United States. Congress. Senate. Committee on Finance minutes. 1863-1864.
- United States Constitution collection, 1773-1944.
- United States. Council of National Defense. Women's Committee. Council of National Defense (Washington, D.C.) Woman's Committee records. 1917-1918.
- United States. Federal Trade Commission. United States. Federal Trade Commission records. 1914-1934.
- United States. Forest Service records, 1902-1953.
- United States. Forest Service. United States. Forest Service records, 1902-1953.
- United States. National Advisory Committee for Aeronautics. United States. National Advisory Committee for Aeronautics records.
- United States. Office of Strategic Services. The Office of Strategic Services maps on microfilm collection.
- United States. Patent Office. U.S. Patent Office advertising prints and labels collection.
- United States. President's Research Committee on Social Trends records, 1924-1936.
- United States. President's Research Committee on Social Trends. United States. President's Research Committee on Social Trends records, 1924-1936.
- Untermeyer-Frost collection, 1913-1964.
- Untermeyer, Louis, 1885-1977. Untermeyer-Frost collection, 1913-1964.
- Ursinus, Oskar. Oskar Ursinus collection of aeronautical pictures.
- Ursinus, Oskar. Oskar Ursinus papers, 1908-1943.
- Ursinus, Oskar. Oskar Ursinus papers,1908-1943.
- U.S. Patent Office advertising prints and labels collection.
V
- Van Buren family papers.
- Van Buren, Lawrence, 1786-1868. Lawrence Van Buren family papers, 1721-1938.
- Van Deurs, George, 1901-1984. George van Deurs papers, 1851-1982.
- Van Devanter, Willis, 1859-1941. Willis Van Devanter papers, 1884-1941.
- Van Doren, Irita, 1891-1966. Irita Van Doren papers, 1920-1967.
- Van Pelt, Frank, 1890-1949. Frank Van Pelt collection 1917-1931.
- Van Voorhis, Daniel, 1878-1956. Daniel Van Voorhis correspondence and reports. 1911-1913.
- Van Voorhis, Edith Burbank, 1882-1955. Edith Burbank Van Voorhis correspondence. 1911-1913.
- Van Voorhis family. Burbank-Van Voorhis families papers, 1814-1913.
- Van Voorhis family papers.
- VanderPoel, Halsted B. Halsted B. VanderPoel literary collection, 1815-1929.
- Vaudeville and minstrel photograph collection, circa 1910s-1940.
- Veblen, Oswald, 1880-1960. Oswald Veblen papers, 1881-1960.
- Vernon Boyce Hampton papers, 1872-1971.
- Vernon Duke collection, 1918-1968.
- Veterans History Project collection (Library of Congress). (25)
- Veterans History Project (U.S.). Andrew Gbur collection, 1916-1992.
- Veterans History Project (U.S.). Charles Edmund Worth collection, 1917-1919.
- Veterans History Project (U.S.). Clyde Wilbur Russell collection, 1917-1919.
- Veterans History Project (U.S.). Edgar D. Andrews collection 1917-1974.
- Veterans History Project (U.S.). Edward Henry Loudenbeck collection, 1917-1919.
- Veterans History Project (U.S.). Ewing Harry Miller collection, 1917-1923.
- Veterans History Project (U.S.). Frank Van Pelt collection 1917-1931.
- Veterans History Project (U.S.). George Washington Pearcy collection, 1915-1949.
- Veterans History Project (U.S.). Harold Benjamin Graham collection 1917-2012.
- Veterans History Project (U.S.). Howard Elbridge Robbins collection 1918.
- Veterans History Project (U.S.). John Carroll Parent, Sr., collection 1907-2015.
- Veterans History Project (U.S.). John McRae Kennelly collection 1917-1919.
- Veterans History Project (U.S.). Joseph Royston Gathings, I, collection, 1914-1936.
- Veterans History Project (U.S.). Kenje Ogata collection, 1924-2002, 2008, 2011.
- Veterans History Project (U.S.). Leo Joseph Bailey collection 1917-2008.
- Veterans History Project (U.S.). LeRoy Feay Thompson collection 1918-2011.
- Veterans History Project (U.S.). Louis Milton Ronsheim collection, 1914-2000.
- Veterans History Project (U.S.). Personal Narratives of the Forced Removal and Incarceration of Japanese Americans During World War II.
- Veterans History Project (U.S.). Peter Shemonsky collection, 1899-1970.
- Veterans History Project (U.S.). Philip E. Scholz collection, 1918-1920.
- Veterans History Project (U.S.). Thomas Estévez Terry collection, 1918-1919.
- Veterans History Project (U.S.). Wallace E. Rand collection 1893-1919.
- Veterans History Project (U.S.). William Hamilton Felton, Jr., collection, 1917-1918.
- Veterans History Project (U.S.). William Hurn, Jr., collection 1917-2014.
- Veterans History Project (U.S.). William Sylvanus Morris collection, 1917-2016.
- Vetter, Helen Cook. Helen Cook Vetter papers. 1910-1977.
- Victor Hammer collection.
- Victor Herbert collection, 1880-1939.
- Victor Murdock papers, 1824-1971.
- Victor S. Clark papers, 1827-1944.
- Vincent Youmans music manuscripts, 1920-1957.
- Vinnie Ream and R.L. Hoxie papers, 1853-1937.
- Vinton Freedley collection, 1920-1949.
- Vinton Freedley papers, 1865-1960.
- Visual materials from the Blackwell family papers.
- Visual materials from the Booker T. Washington papers. (2)
- Visual materials from the Daniel Carter Beard papers.
- Visual materials from the Edward L. Bernays papers.
- Visual materials from the Ham, Connelly, Parks and Snodgrass families.
- Visual materials from the Harold L. Ickes papers.
- Visual materials from the Janet Flanner and Solita Solano papers.
- Visual materials from the Moral Re-armament records. (2)
- Visual materials from the National Association for the Advancement of Colored People records (Library of Congress).
- Visual materials from the National Woman's Party records. (2)
- Visual materials from the Walt Whitman papers in the Charles E. Feinberg collection.
- Vitte, S. I︠U︡. (Sergeĭ I︠U︡lʹevich), graf, 1849-1915. Graf Sergeĭ I︠U︡lʹevich Vitte letter. 1893.
- Voge, Adolph Law, 1875-1945. Adolph Law Voge papers, 1915-1939.
- Volkogonov, D. A. (Dmitriĭ Antonovich). Dmitriĭ Antonovich Volkogonov papers, 1887-1995.
- Von Recum family. Howard-von Recum family papers, 1869-1972.
- Von Recum family papers.
- Von Recum, Marie Ernestine Howard, Baroness, 1868-1954. Marie Ernestine Howard von Recum correspondence and diaries.
- Von Tilzer / Gumm collection, 1878-1959.
- Von Tilzer, Harry, 1872-1946. Harry Von Tilzer and H. Harold Gumm papers, 1878-1959.
- Vozdushnye puti records, 1923-1967.
- Vrooman, Carl Schurz, 1872-1966. Carl Schurz Vrooman papers, 1872-1975.
- Vrooman, Frank Buffington, 1862-1951. Frank Buffington Vrooman papers.
- Vrooman, Hiram, 1871- Hiram Vrooman papers.
- Vrooman, Julia Scott. Julia Scott Vrooman papers.
- Vrooman, Walter, 1869- Walter Vrooman papers.
W
- W. Averell Harriman papers, 1869-2001.
- W. Beverly Carter papers, 1924-1997.
- W. Cameron Forbes papers, 1904-1946.
- W J McGee papers, 1880-1916.
- W. Morgan Shuster papers, 1900-1964.
- W. Somerset Maugham papers, 1897-1966.
- W.A. Croffut papers, 1774-1933.
- Waddy B. Wood architectural drawing archive.
- Waddy B. Wood archive.
- Waddy B. Wood papers, 1885-1941.
- Waddy Butler Wood papers.
- Wade Hampton family papers, 1855-1935.
- Wade, Joseph Sanford, 1880-1961. Joseph Sanford Wade papers, 1898-1955.
- Wadsworth family. James Wadsworth family papers, 1730-1959.
- Wadsworth family papers.
- Wadsworth, James, 1768-1844. James Wadsworth family papers, 1730-1959.
- Wadsworth, James S. (James Samuel), 1807-1864. James S. Wadsworth papers.
- Wadsworth, James Wolcott, 1846-1926. James Wolcott Wadsworth papers.
- Wadsworth, James Wolcott, 1877-1952. James Wolcott Wadsworth papers.
- Wadsworth, William, 1761-1833. William Wadsworth papers.
- Waggaman & Ray architectural drawing archive.
- Waggaman & Ray archive (Library of Congress).
- Waggaman & Ray collection.
- Waksman, Selman A. (Selman Abraham), 1888-1973. Selman A. Waksman papers, 1915-1960.
- Waldo Gifford Leland papers, 1844-1966.
- Waldo Peirce papers, 1889-1985.
- Walker, Bertrand N. O. Bertrand N.O. Walker papers, 1899-1921.
- Walker, C. Lester (Charles Lester). C. Lester Walker papers.
- Walker family papers, 1899-2022.
- Walker, Mary Larson, 1898-1991. Mary Larson Walker papers.
- Walker, Webster Lemuel, 1880-1939. Webster Lemuel Walker correspondence. 1899-1901, 1919.
- Walker, William Anson, 1879-1922. William Anson Walker correspondence. 1899-1900.
- Walker, William Holmes, 1820-1908. William Holmes Walker papers, 1855-1982.
- Wallace E. Rand collection 1893-1919.
- Wallace H. White papers, 1915-1948.
- Walsh, Jim, 1903-1990. Jim Walsh papers, 1867-1987, and undated.
- Walsh, Thomas James, 1859-1933. Thomas James Walsh and John Edward Erickson papers, 1910-1934.
- Walt Whitman papers in the Charles E. Feinberg collection, 1763-1985.
- Walter Francis Willcox papers, 1851-1965.
- Walter L. Fisher papers, 1871-1963.
- Wanda Landowska and Denise Restout papers, 1843-2002.
- War map.
- Ward, Lester F. (Lester Frank), 1841-1913. Lester Frank Ward papers, 1883-1906.
- Warner Chappell Music, Inc. Warner/Chappell collection, 1880-1987.
- Warner/Chappell collection, 1880-1987.
- Warren, Charles, 1868-1954. Charles Warren papers, 1874-1954.
- Warren, Elinor Remick, 1900-1991. Elinor Remick Warren papers, 1872-2004.
- Warren, Fiske, 1862-1938. Warren Fiske diary excerpts.
- Warren G. Child papers, 1907-1942.
- Warren G. Harding-Carrie Fulton Phillips correspondence, 1910-1924.
- Warren G. Harding papers, 1908-1926.
- Warren Gerald Child papers.
- Warren K. Billings papers, 1899-1973.
- Warren, Samuel P. (Samuel Prowse), 1841-1915. Samuel P. Warren collection, 1849-1915.
- Washburn, Edward W. (Edward Wight), 1881-1934. Edward W. Washburn family papers, 1817-1934.
- Washington, Booker T., 1856-1915. Booker T. Washington papers.
- Washington, Booker T., 1856-1915. Booker T. Washington papers, 1853-1946.
- Washington, Booker T., 1856-1915. Visual materials from the Booker T. Washington papers.
- Washington City Orphan Asylum (Washington, D.C.). Washington City Orphan Asylum (Washington, D.C.) records. 1828-1927.
- Washington Female Orphan Asylum (Washington, D.C.). Washington Female Orphan Asylum (Washington, D.C.) records. 1815-1828.
- Washington Irving Chambers papers, 1871-1943.
- Waterman architectural drawing archive (Library of Congress).
- Waterman collection.
- Waterman, Thomas Tileston, 1900-1951. Waterman architectural drawing archive (Library of Congress).
- Waters, Asa H. (Asa Holman), 1808-1887. Asa H. Waters papers.
- Waters, Elizabeth. Elizabeth Waters papers.
- Watson, Edward H. (Edward Howe), 1873-1942. Edward H. Watson papers.
- Watson, Henry, Jr., 1810-1891. Henry Watson Jr. papers. 1802-1884.
- Watson, James T. James T. Watson papers.
- Watson, John Crittenden, 1842-1923. John Crittenden Watson papers, 1844-1960.
- Watterson, Henry, 1840-1921. Henry Watterson papers, 1863-1920.
- Wayman, Dorothy G. (Dorothy Godfrey), 1893-1975. Dorothy G. Wayman papers, 1862-1971.
- Webb, Charles Henry, 1834-1905. Charles Henry Webb papers, 1859-1924.
- Weik, Jesse William, 1857-1930. Jesse William Weik papers. 1830-1927.
- Weiss, Edoardo, 1889-1970. Edoardo Weiss papers, 1919-1970.
- Welch, Linda Margaret Farr. Linda Margaret Farr Welch genealogical research files.
- Welles, Harriet Ogden Deen. Harriet Ogden Deen Welles diary. 1910.
- Welles, Roger, 1862-1932. Roger Welles papers, 1884-1926.
- Wells, Philip P. (Philip Patterson), 1868-1929. Philip P. Wells papers.
- Wendell Berge papers, 1907-1950.
- Wesley Winans Stout papers, 1913-1954.
- West, Helen Hunt, 1892-1963. Helen Hunt West papers.
- West, Mae. Mae West play scripts, 1921-1964.
- Western range cattle and other industries study papers, 1823-1947.
- Wetmore, George Peabody, 1846-1921. George Peabody Wetmore papers, 1885-1916.
- W.G. McAdoo papers, 1786-1941.
- Whelpley family papers, 1837-1929.
- Whistler, Anna Mathilda McNeill, 1804-1881. Anna Mathilda McNeill Whistler papers.
- Whistler, James McNeill, 1834-1903. Pennell-Whistler collection. 1597-1937.
- Whitall, Ann Cooper, 1716-1797. Ann Cooper Whitall diary. 1760-1762.
- White, Henry, 1850-1927. Henry White papers, 1812-1931.
- White, Margaret Stuyvesant Rutherford, 1857-1916 Margaret Stuyvesant Rutherford White papers.
- White, Newman Ivey, 1892-1948. Newman I. White papers, 1812-1929.
- White, Wallace H. (Wallace Humphrey), 1877-1952. Wallace H. White papers, 1915-1948.
- White, William Allen, 1868-1944. William Allen White papers, 1859-1944.
- Whiting, John D. (John David), 1882-1951. John D. Whiting papers, 1890-1970.
- Whitlock, Brand, 1869-1934. Brand Whitlock papers, 1890-1934.
- Whitman Bassow papers, 1920-1990.
- Whitman, Walt, 1819-1892. Walt Whitman notes. 1850.
- Whitman, Walt, 1819-1892. Walt Whitman papers.
- Whitman, Walt, 1819-1892. Walt Whitman papers in the Charles E. Feinberg collection. 1806-1981.
- Whitney, Harry Payne, 1872-1930. Harry Payne Whitney collection of letters of William Collins Whitney. 1757-1942.
- Whitney, William C. (William Collins), 1841-1904. Harry Payne Whitney collection of letters of William Collins Whitney, 1757-1942.
- Wickes, Frances G. (Frances Gillespy), 1875-1967. Frances G. Wickes papers, 1896-1996.
- Wiksell, Gustave Percival. Gustave Percival Wiksell papers, 1855-1939.
- Wilbur and Orville Wright papers.
- Wilbur J. Carr papers, 1892-1942.
- Wilbur Underwood papers, 1895-1969.
- Wilbur Wright and Orville Wright papers, 1809-1979.
- Wilbur Wright papers.
- Wilder, Marshall P. (Marshall Pinckney), 1859-1915. Marshall P. Wilder papers, 1880-1914.
- Wile, Frederic William, 1873-1941. Frederic William Wile scrapbooks, 1898-1941.
- Wiley, Harvey Washington, 1844-1930. Harvey Washington Wiley papers, 1854-1954.
- Wilgus, William J. (William John), 1865-1949. William J. Wilgus papers, 1856-1944.
- Wilhelm Fliess papers, 1894-1929.
- Wilhelm Reich papers, 1920-1952.
- Wilkinson, Theodore Stark, Jr., 1888-1946. Theodore Stark Wilkinson Jr. papers, 1893-1971.
- Willard, Antonia Ford, 1838-1871. Antonia Ford Willard papers.
- Willard B. Prince collection of World War I maps and related materials.
- Willard, Belle Layton Wyatt, 1871-1954. Belle Layton Wyatt Willard papers.
- Willard family papers, 1800-1968.
- Willard family. Willard family papers, 1800-1968.
- Willard H. Brownson papers, 1859-1932.
- Willard, Joseph Clapp, 1820-1897. Joseph Clapp Willard papers.
- Willard, Joseph Edward, 1865-1924. Joseph Edward Willard papers.
- Willcox, Walter F. (Walter Francis), 1861-1964. Walter Francis Willcox papers, 1851-1965.
- Willebrandt, Mabel Walker, 1889-1963. Mabel Walker Willebrandt papers, 1881-1978.
- William A. Benney papers, 1920-1966.
- William Allen White papers, 1859-1944.
- William Banks Caperton papers, 1873-1939.
- William C. Whitney papers.
- William Cameron Forbes papers.
- William Collins Whitney papers.
- William Crawford Gorgas papers, 1857-1919.
- William Dawson Johnston papers, 1842-1927.
- William Dudley Foulke papers, circa 1470-1952.
- William E. Chandler papers, 1863-1917.
- William E. Humphrey papers, 1903-1936.
- William Edgar Borah papers, 1905-1940.
- William Edward Dodd papers, 1895-1955.
- William Ewart Humphrey papers.
- William F. Fullam papers, 1873-1942.
- William Goodell papers, 1818-1917.
- William H. Emory papers, 1877-1948.
- William H. Littlewood map collection.
- William H. Moody papers, 1879-1916.
- William H. Taft papers, 1784-1973.
- William Hamilton Felton, Jr., collection, 1917-1918.
- William Henry Allison diaries, 1868-1940.
- William Henry Allison papers.
- William Henry Richards papers, 1856-1946.
- William Holmes Walker papers, 1855-1982.
- William Howard Taft papers, 1915-1953.
- William H.P. Blandy papers, 1913-1977.
- William Hurn, Jr., collection 1917-2014.
- William J. Ghent papers, 1876-1942.
- William J. Wilgus papers, 1856-1944.
- William Jennings Bryan papers, 1877-1940.
- William L. Daley collection relating to Billy Sunday, 1914-1925.
- William LePre Houston family papers, 1777-1936.
- William Marion Jardine papers, 1908-1955.
- William McKinley map collection, 1890-1906.
- William McKinley papers, circa 1847-1935.
- William Morgan Shuster papers.
- William O. Douglas papers, 1801-1980.
- William Orr papers, 1890-1939.
- William R. Day papers, 1820-1923.
- William R. Shepherd papers, 1554-1931.
- William Rea Furlong map collection.
- William S. Hart papers.
- William Shepherd Benson papers, circa 1791-1952.
- William Smith Culbertson papers, 1897-1965.
- William Somerset Maugham papers.
- William Sowden Sims papers, 1856-1951.
- William Surrey Hart papers.
- William Sylvanus Morris collection, 1917-2016.
- William T. Hornaday papers, 1866-1975.
- William Thomas Rawleigh papers, 1911-1931.
- William Torrey Harris papers, 1865-1908.
- William W. Coblentz papers, 1883-1960.
- Williams College. Institute of Politics. Williams College. Institute of Politics records. 1926-1932.
- Williams, John Sharp, 1854-1932. John Sharp Williams papers, 1902-1924.
- Willis, Edward, 1834-1910. Edward Willis papers, 1854-1906.
- Willis Van Devanter papers, 1884-1941.
- Willkie, Wendell L. (Wendell Lewis), 1892-1944. Wendell L. Willkie papers.
- Willoughby, Hugh L. (Hugh Laussat), 1856- Hugh L. Willoughby scrapbooks. 1903-1912.
- Wilson, Donald, 1892-1978. Donald Wilson papers, 1910-1979.
- Wilson, Edith Bolling Galt, 1872-1961. Edith Bolling Galt Wilson papers.
- Wilson family. Wilson-McAdoo families papers, 1860-1966.
- Wilson, James Harrison, 1837-1925. James Harrison Wilson papers, circa 1862-1923.
- Wilson, Margaret Woodrow, 1886-1944. Margaret Woodrow Wilson papers. 1912-1943.
- Wilson-McAdoo families papers, 1860-1966.
- Wilson, Woodrow, 1856-1924. Woodrow Wilson papers, 1786-1957.
- Wilstach, Paul, 1870-1952. Paul Wilstach collection of Richard Mansfield papers, 1889-1918.
- Winslow family. Patterson-Winslow family papers, 1813-1963.
- Winslow, Francis, 1851-1908. Francis Winslow papers.
- Winslow, Harriet Patterson, 1859-1923. Harriet Patterson Winslow papers.
- Wister, Owen, 1860-1938. Owen Wister papers, 1829-1966.
- Withers, Charles, 1889?-1947. Charles Withers papers, 1917-1942.
- W.L. McAtee papers, 1803-1963.
- Wolfenstein, Martha, 1911-1976. Martha Wolfenstein papers.
- Wolman, Leo, 1890-1961. Leo Wolman papers, 1870-1958.
- Woman's National Democratic Club records, 1912-2014.
- Woman's National Democratic Club (U.S.). Educational Foundation. Woman's National Democratic Club Educational Foundation records.
- Woman's National Democratic Club (U.S.). Woman's National Democratic Club records, 1912-2014.
- Women's Joint Congressional Committee records, 1920-1970.
- Women's Joint Congressional Committee. Women's Joint Congressional Committee records, 1920-1970.
- Wood architectural drawing archive (Library of Congress). (2)
- Wood collection.
- Wood, James R. (James Rodney). James R. Wood Civil War memoirs.
- Wood, Leonard, 1860-1927. Leonard Wood diary. 1886.
- Wood, Leonard, 1860-1927. Leonard Wood papers, 1825-1942.
- Wood, Louise Adriana, 1869-1943. Louise Adriana Wood papers.
- Wood, Waddy B. Waddy B Wood papers, 1885-1941.
- Wood, Waddy B. (Waddy Butler), 1869-1944. Waddy B. Wood papers, 1885-1941.
- Wood, Waddy B. (Waddy Butler), 1869-1944. Wood architectural drawing archive (Library of Congress).
- Woodbury, Elizabeth Williams Clapp. Elizabeth Williams Clapp Woodbury papers.
- Woodrow Wilson papers, 1786-1957.
- Woods, Arthur, 1870-1942. Arthur Woods papers, 1884-1938.
- Woodson, Carter Godwin, 1875-1950. Carter Godwin Woodson papers, 1736-1974.
- Woolf, S. J. (Samuel Johnson), 1880-1948. Samuel J. Woolf collection.
- Woolley, Ivy Houtz. Ivy Houtz Woolley poem.
- Woolley, Robert Wickliffe, 1871-1958. Robert Wickliffe Woolley papers, 1842-1956.
- Woolsey, Lester Hood, 1877-1961. Lester Hood Woolsey papers, 1831-1958.
- Woolworth, Frank Winfield, 1852-1919. Frank Winfield Woolworth papers, 1859-1980.
- Works by American sculptors.
- World Woman's Party. World Woman's Party records. 1938-1958.
- Worth, Charles Edmund, 1895-1975. Charles Edmund Worth collection, 1917-1919.
- Worthington Chauncey Ford papers, 1900-1926.
- Wright and Wright. Wright and Wright journals and ledgers.
- Wright Cycle Company. Wright Cycle Company journals and ledgers.
- Wright family. Nathaniel Wright family papers, 1787-1917.
- Wright, Frank Lloyd, 1867-1959. Frank Lloyd Wright papers, 1894-1958.
- Wright, Irene Aloha, 1879-1972. Irene Aloha Wright papers, 1620-1977.
- Wright, Jerauld. Jerauld Wright papers, 1853-1960.
- Wright, Milton, 1828-1917. Milton Wright diaries. 1901-1907.
- Wright, Nathaniel, 1789-1875. Nathaniel Wright family papers, 1787-1917.
- Wright, Orville, 1871-1948. Wilbur Wright and Orville Wright papers. 1809-1979.
- Wright, Wilbur, 1867-1912. Wilbur Wright and Orville Wright papers. 1809-1979.
- Wunderlich, Georg Martin, 1883-1951. Georg Martin Wunderlich papers, 1897-1951.
- Wyatt, Joseph W. Joseph W. Wyatt papers.
Y
- Yarnell, Harry E. (Harry Ervin), 1875-1959. Harry E. Yarnell papers.
- Youmans, Vincent, 1898-1946. Vincent Youmans music manuscripts, 1920-1957.
- Young, Agnes Brooks, 1898-1974. Agnes Brooks Young journal. 1940-1945.
- Young Men's Christian Association of the City of New York. Committee for the Suppression of Vice. Young Men's Christian Association of the City of New York. Committee for the Suppression of Vice records.