Browse Finding Aids by Date
1801-1850
A
- Aaron Burton Levisee papers, 1847-1992.
- Abbot family. Henry L. Abbot family papers, 1770-2001.
- Abbot, Henry L. Henry L. Abbot family papers, 1770-2001.
- Abraham Lincoln papers, 1774-1948.
- A.D. Bache papers, 1828-1863.
- Adam Gurowski papers, 1743-1898.
- Adams, Abigail, 1744-1818. Abigail Adams papers.
- Adams, Charles Francis, 1807-1886. Charles Francis Adams papers.
- Adams, Charles Francis, 1835-1915. Charles Francis Adams papers.
- Adams family. Adams family papers, 1776-1948.
- Adams family papers, 1776-1948.
- Adams, Henry, 1838-1918. Henry Adams papers.
- Adams, John, 1735-1826. John Adams papers.
- Adams, John Quincy, 1767-1848. John Quincy Adams papers.
- Adams, Louisa Catherine, 1775-1852. Louisa Catherine Adams papers.
- Adams, Richard, active 1793. Richard Adams papers.
- Adams, Samuel, 1722-1803. Samuel Adams papers.
- Adams, Samuel, 1722-1803. Samuel Adams papers, 1635-1826.
- 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.
- Agustín de Iturbide papers, 1799-1880.
- Aiken family. Pierce-Aiken family papers, 1797-1903.
- Albert Gallatin Marchand papers, 1801-1862.
- Albert J. Beveridge collection of John Marshall papers, 1776-1844.
- Albert James Myer papers, 1816-1880.
- Alden Partridge papers, 1807-1959.
- 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, Zoë Worthington Fiske, 1864-1942. Zoë Worthington Fiske Aldrich papers.
- Alex. Brown & Sons. Alex. Brown & Sons records, 1796-1908.
- Alex. Brown & Sons records, 1796-1908.
- Alexander Dallas Bache papers.
- Alexander Hamilton papers, 1708-1917.
- Alfred Mordecai papers, 1790-1948.
- Allen, William, 1803-1879. William Allen papers, 1796-1879.
- Amasa J. Parker papers, 1836-1875.
- Amasa Junius Parker papers.
- American Colonization Society. American Colonization Society records, 1792-1964.
- American Colonization Society records, 1792-1964.
- American Institute of Aeronautics and Astronautics. Institute of the Aerospace Sciences archives, 1783-1962.
- 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, Abigail Taylor, 1739- Abigail Taylor Amory papers.
- Amory family. Amory family papers, 1697-1882.
- Amory family papers, 1697-1882.
- Amory, John, 1728-1803. John Amory petition. circa 1783.
- Amory, Thomas, 1682-1728. Thomas Amory papers.
- Amory, Thomas, 1762-1823. Thomas Amory papers.
- Amos Kendall papers, 1835-1909.
- Anderson, Robert, 1805-1871. Robert Anderson papers, 1819-1948.
- Andrew Ellicott papers, 1777-1829.
- Andrew H. Foote papers, 1822-1890.
- Andrew Jackson Donelson papers, 1779-1943.
- Andrew Jackson papers, 1775-1874.
- Andrew Stevenson and J.W. Stevenson papers, 1756-1882.
- Andrew Stevenson papers.
- Anna Maria Brodeau Thornton papers, 1793-1861.
- Anson Burlingame and Edward L. Burlingame family papers, 1810-1922.
- Anthony, Mary S. Mary S. Anthony papers.
- Anthony, Susan B. (Susan Brownell), 1820-1906. Susan B. Anthony papers, 1846-1934.
- Antrim, Benajah Jay. Benajah Jay Antrim journals, 1849.
- Archivo Nacional de Cuba. Archivo Nacional de Cuba collection pertaining to Spanish colonial rule in Louisiana and the Floridas, 1770-1911.
- Archivo Nacional de Cuba collection pertaining to Spanish colonial rule in Louisiana and the Floridas, 1770-1911.
- Argenteau family. Mercy-Argenteau family papers, 1410-1921.
- Argenteau family papers.
- Armand Hammer papers, circa 1508-1989.
- Armes, Ethel, 1876-1945. Ethel Armes collection of Lee family papers, 1671-1936.
- Arthur family. Charles Pinkerton collection of Arthur and Herndon family papers, 1822-1938.
- Arthur family papers.
- Asa Gray papers, 1840-1859.
- Aury, Luis. Luis Aury papers, 1801-1911.
- Austin, James Trecothick, 1784-1870. James Trecothick Austin papers.
- Autographs of European notables. 1422-1879.
B
- Bache, A. D. (Alexander Dallas), 1806-1867. A.D. Bache papers, 1828-1863.
- Bagot, Charles, 1781-1843. Charles Bagot papers.
- Baird, Samuel J. (Samuel John), 1817-1893. Samuel J. Baird papers, 1834-1892.
- Baldorioty de Castro, Román, 1822-1889. Román Baldorioty de Castro papers.
- Baltimore Insurance Company. Baltimore Insurance Company records.
- Bancker, Charles Nicoll, 1778-1869. Charles Nicoll Bancker correspondence, 1803-1830.
- Bancroft-Bliss families papers, 1788-1928.
- Bancroft, Elizabeth Davis, 1803-1886. Elizabeth Davis Bancroft papers.
- Bancroft family. Bancroft-Bliss families papers, 1788-1928.
- Bancroft family papers.
- Bancroft, George, 1800-1891. George Bancroft papers.
- Bank of the United States (Baltimore, Md.). Bank of the United States (Baltimore, Md.) records, 1795-1855.
- Bank of the United States (Baltimore, Md.) records, 1795-1855.
- Barbour, Lucian, 1811-1880. Lucian Barbour papers, 1838-1977.
- Bartlett, Ezra, 1770-1848. Ezra Bartlett papers.
- Bartlett family. Josiah Bartlett family papers, 1710-1931.
- Bartlett, Josiah, 1729-1795. Josiah Bartlett family papers, 1710-1931.
- Bartlett, Josiah, 1729-1795. Josiah Bartlett papers.
- Bartlett, Josiah, 1768-1838. Josiah Bartlett papers.
- Bartlett, Josiah, 1803-1853. Josiah Bartlett papers.
- Bartlett, Levi, 1763-1828. Levi Bartlett papers.
- 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.
- Bayard, James A. (James Asheton), 1767-1815. James A. Bayard and Richard H. Bayard papers. 1797-1885.
- Bayard, Richard H. (Richard Henry), 1796-1868. James A. Bayard and Richard H. Bayard papers. 1797-1885.
- Baylies, Francis, 1783-1852. Francis Baylies papers, 1814-1843.
- 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.
- Beatty, Charles, of Georgetown, Md. Charles Beatty account book. 1750-1809.
- Bebb, William, 1802-1873. William Bebb papers, 1705-1849.
- 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.
- Beecher, Henry Ward, 1813-1887. Henry Ward Beecher papers, 1836-1886.
- Bégon, Michel. Michel Bégon journal. 1632-1685.
- Bell, John, 1796-1869. John Bell papers, 1815-1861.
- Benajah Jay Antrim journals, 1849.
- Benajah Jay Antrim papers.
- Bénard de La Harpe, Jean Baptiste, 1683-1765. Journal historique de l'établissement des François á Louisiane. 1724.
- Benjamin B. French family papers, 1778-1940.
- Benjamin, Calvin, -1847. Calvin Benjamin papers, circa 1838-1882.
- Benjamin Garber papers, 1916-2009.
- Benjamin Henry Latrobe architectural drawing archive.
- Benjamin Henry Latrobe archive.
- Benjamin Henry Latrobe engineering drawing archive.
- Benjamin Henry Latrobe papers, 1803-1817.
- Benjamin Lincoln papers, 1778-1806.
- Benjamin Tappan papers, 1795-1900.
- Betances, Ramón Emeterio, 1827-1898. Ramón Emeterio Betances correspondence.
- Beveridge, Albert J. (Albert Jeremiah), 1862-1927. Albert J. Beveridge collection of John Marshall papers, 1776-1844.
- Bickerdyke, Mary Ann, 1817-1901. Mary Ann Bickerdyke papers, 1847-1905.
- Biddle, Eliza. Eliza Biddle diary. 1814.
- Biddle, Nicholas, 1786-1844. Nicholas Biddle papers, 1681-1933.
- Bing, Julius. Julius Bing writings.
- Bird, Robert Montgomery, 1806-1854. John M. Clayton memoir. undated.
- Birney, James Gillespie, 1792-1857. James Gillespie Birney papers, 1830-circa 1895.
- Birney, William, 1819-1907. William Birney papers.
- Black history collection, 1623-2008.
- Blackwell, Alice Stone, 1857-1950. Alice Stone Blackwell papers.
- Blackwell, Antoinette Louisa Brown, 1825-1921. Antoinette Louisa Brown Blackwell papers.
- Blackwell, Elizabeth, 1821-1910. Elizabeth Blackwell papers.
- Blackwell, Emily, 1826-1910. Emily Blackwell papers.
- Blackwell family. Blackwell family papers, 1759-1960.
- Blackwell family papers, 1759-1960.
- Blackwell, H. B. (Henry Browne), 1825-1909. Henry Browne Blackwell papers.
- Blackwell, Kitty Barry, 1848-1936. Kitty Barry Blackwell papers.
- Blair & Rives. Blair & Rives records, 1821-1905.
- Blair & Rives records, 1821-1905.
- Blair family. Blair family papers, 1755-1968.
- Blair family papers, 1755-1968.
- Blair, Francis Preston, 1791-1876. Francis Preston Blair papers.
- Blair, Frank P., Jr. (Francis Preston), 1821-1875. Frank P. Blair papers.
- Blair, Gist, 1860-1940. Gist Blair papers.
- Blair, Montgomery, 1813-1883. Montgomery Blair papers.
- Blair, Woodbury. Woodbury Blair papers.
- Blennerhassett, Harman, 1764-1831. Harman Blennerhassett papers, 1755-1866.
- Blennerhassett, Harman, Jr., 1801-1854. Harman Blennerhassett, Jr., manuscript volume.
- Bliss, Alexander, 1792-1827. Alexander Bliss papers.
- Bliss, Alexander, 1827-1896. Alexander Bliss papers.
- Bliss family. Bancroft-Bliss families papers, 1788-1928.
- Bliss family papers.
- Bliss, Tasker Howard, 1853-1930. Tasker Howard Bliss collection of World War I maps and related materials.
- Boazio, Baptista. Map and views illustrating Sir Francis Drake's West Indian voyage, 1585-6. 1589.
- Bonney family papers.
- Bonney family. Stiles, Horr, and Bonney families papers, 1803-1907.
- Bourne, Sylvanus, 1761-1817. Sylvanus Bourne papers.
- Bourne, Sylvanus, 1761-1817. Sylvanus Bourne papers, 1775-1859.
- Bowker, R. R. (Richard Rogers), 1848-1933. R.R. Bowker papers, 1831-1931.
- Bozman family. John Leeds Bozman family papers, 1688-1883.
- Bozman, John Leeds, 1757-1823. John Leeds Bozman family papers, 1688-1883.
- Bradbury collection, 1846-1928.
- Bradbury, William B. (William Batchelder), 1816-1868. William B. Bradbury collection, 1846-1928.
- Bradley, Stephen Row, 1754-1830. Stephen Row Bradley papers.
- Bradley, William Czar, 1782-1867. William Czar Bradley papers.
- 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, 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, 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.
- Breneman family. Breneman family collection of early American manuscripts, 1755-1825.
- Breneman family collection of early American manuscripts, 1755-1825.
- Breneman, Franklin, Breneman family collection of early American manuscripts. 1755-1825.
- Breneman, Franklin, Breneman family collection of early American manuscripts. 1755-1825. Breneman family collection of early American manuscripts, 1755-1825.
- British ministers' correspondence in the Public Archives of Canada, 1791-1875.
- British Royal Navy logbooks, 1808-1840.
- Brodhead, Daniel Dodge. Daniel Dodge Brodhead papers, 1821-1853.
- Bromwell, Henry Pelham Holmes, 1823-1903. Henry Pelham Holmes Bromwell papers, 1794-1929.
- Brooks, Peter Chardon, 1767-1849. Peter Chardon Brooks papers.
- Brown, James, 1766-1835. James Brown papers, 1765-1867.
- Browning, Charles Henry. Charles Henry Browning papers.
- Browning, Eleanor Hanlon, 1809-1857. Eleanor Hanlon Browning papers.
- Browning family. Browning family papers, 1824-1917.
- Browning family papers, 1824-1917.
- Browning, Robert Lewright, 1803-1850. Robert Lewright Browning papers.
- Browning, Robert Lewright, 1835-1860. Robert Lewright Browning papers.
- Bruce, Charles, 1798-1879. Charles Bruce plantation accounts and presidential pardon.
- Bruce, Elvira, 1788-1858. Elvira Bruce household accounts.
- Bruce family. Bruce family papers, 1792-1883.
- Bruce family papers, 1792-1883.
- Bruce, James, 1763-1837. James Bruce plantation accounts.
- Bryan, W. B. (Wilhelmus Bogart), 1854-1938. W.B. Bryan notes and newspaper extracts, 1789-1888.
- Buchanan, James, 1791-1868. James Buchanan and Harriet Lane Johnston papers, 1825-1887.
- Bucke, Richard Maurice, 1837-1902. Richard Maurice Bucke papers.
- Bulfinch architectural drawing archive (Library of Congress).
- Bulfinch, Charles, 1763-1844 Bulfinch architectural drawing archive (Library of Congress).
- Bulfinch collection.
- Burbank family. Burbank-Van Voorhis families papers, 1814-1913.
- Burbank family papers.
- 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.
- Burke, Edmund, 1809-1882. Edmund Burke papers, 1821-1881.
- 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.
- Burr Conspiracy collection, 1806-1808.
- 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.
- Bush family. Danforth-Bush family collection, 1721-2007.
- Bush family papers.
- Bush, J. Danforth (Joshua Danforth), 1868-1926. Danforth-Bush family collection. 1721-2007.
- Bush, J. Danforth (Joshua Danforth), 1868-1926. Danforth-Bush family collection. 1721-2007. Danforth-Bush family collection, 1721-2007.
- Butler, Charles, 1802-1897. Charles Butler papers, 1819-1929.
C
- C. R. Hughes Embargo Act of 1807 map tracings collection.
- Cadmus M. Wilcox papers, 1846-1887.
- Cadmus Marcellus Wilcox papers.
- Cahoone, John. John Cahoone journal. 1829.
- Caleb B. Smith papers, 1841-1862.
- Caleb Blood Smith papers.
- Caleb Cushing papers, circa 1785-1906.
- Caleb Henry Carlton papers, 1831-1954.
- Calhoun, John C. (John Caldwell), 1782-1850. John C. Calhoun papers, 1818-1850.
- Calhoun, John C. (John Caldwell), 1782-1850. John C. Calhoun papers in the Library of Congress.
- California Gold Rush collection, 1849-1900.
- Calvin Benjamin papers, circa 1838-1882.
- Campbell family. Campbell-Preston-Floyd families papers, 1741-1931.
- Campbell family papers.
- Campbell-Preston-Floyd families papers, 1741-1931.
- Canberry, Lewis. Lewis Canberry survey notebooks. 1791-1828.
- Carl Brent Swisher collection of research material relating to Roger Brooke Taney, 1836-1962.
- Carl Brent Swisher papers.
- Carlton, Caleb Henry, 1836-1923. Caleb Henry Carlton papers, 1831-1954.
- Carnegie Institution of Washington. Carnegie Institution of Washington reproductions collection, 1686-1941.
- Carnegie Institution of Washington reproductions collection, 1686-1941.
- Carroll, Charles, 1702-1782. Charles Carroll papers.
- Carroll, Charles, 1737-1832. Charles Carroll papers.
- Carroll, Daniel, 1764-1849. Daniel Carroll papers, 1662-1920.
- Carroll family. Carroll family papers, 1684-1838.
- Carroll family papers, 1684-1838.
- Carroll family papers, 1686-1897.
- Carson, Marian S. Marian S. Carson collection of manuscripts, 1656-1995.
- Carter, Lucy Grymes Lee, 1786-1860. Lucy Grymes Lee Carter papers.
- Carter, Robert, 1728-1804. Robert Carter papers, 1685-1828.
- Cartter family papers, 1836-1893.
- Cass, Lewis, 1782-1866. Lewis Cass papers.
- Cathcart, James L. (James Leander), 1767-1843. James L. Cathcart papers, 1785-1817.
- Caton, John Dean, 1812-1895. John Dean Caton papers, 1826-1947.
- Causten, James H., 1788-1874. James H. Causten papers.
- Causten-Pickett papers, 1765-1916.
- Chamberlain, Joshua Lawrence, 1828-1914. Joshua Lawrence Chamberlain papers, 1775-1913.
- Chardon, Francis A., -1848. Francis A. Chardon journals from Fort Clark, N.D. 1834-1839.
- Charles Bulfinch architectural drawing archive.
- Charles Bulfinch archive.
- Charles Butler papers, 1819-1929.
- Charles E. Feinberg collection.
- Charles Goodwin Ridgely papers, 1813-1826.
- Charles Henry Harvey papers, 1835-1965.
- Charles Nicoll Bancker correspondence, 1803-1830.
- Charles Nicoll Bancker papers.
- Charles O'Neil papers, 1833-1927.
- Charles Pinkerton collection of Arthur and Herndon family papers, 1822-1938.
- Charles Sumner correspondence, 1841-1874.
- Charles Sumner papers.
- Charles Thomson papers, 1765-1888.
- Charles W. Hack papers, circa 1800-1926.
- Charles Wilkes papers, 1607-1959.
- Chase, Cornelius, 1780-1868. Cornelius Chase family papers, 1745-1974.
- Chase, Cornelius Thurston, 1819-1870. Cornelius Thurston Chase papers. 1835-1953.
- Chase family. Cornelius Chase family papers, 1745-1974.
- Chase, Salmon P. (Salmon Portland), 1808-1873. Salmon P. Chase papers, 1755-1898.
- Chaumont, Jacques-Donatien Leray de, 1725-1803. Jacques-Donatien Leray de Chaumont invoice book. 1777-1779.
- Chauncey, Isaac, 1772-1840. Isaac Chauncey journal. 1804.
- Chauncy, Elnathan, 1724-1796. Elnathan Chauncy sermons.
- Chippendale Company play materials, 1802-1853.
- Chippendale Company play scripts, 1800-1868.
- Chippendale, William Henry, 1801-1888. Chippendale Company play scripts, 1800-1868.
- 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 Prince autobiography and souvenir booklet, 1806-1891.
- Christopher Prince papers.
- 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. (2)
- Clapp family. Clapp family papers, 1789-1935.
- Clapp family papers, 1789-1935.
- Clapp, Mary Jane Emerson, 1835-1922. Mary Jane Emerson Clapp papers.
- Clark, Victor S. (Victor Selden), 1868-1946. Victor S. Clark papers, 1827-1944.
- Clark, William, 1770-1838. William Clark diary excerpt. undated.
- Clausing, Ludwig, 1809?-1834. Ludwig Clausing papers.
- Clay family. Henry Clay family papers, 1732-1927.
- Clay family papers.
- Clay, Henry, 1777-1852. Henry Clay family papers, 1732-1927.
- Clay, James B. (James Brown), 1817-1864. James B. Clay papers.
- Clay, John Randolph, 1808-1885. John Randolph Clay diary. 1830-1831.
- Clayton, John M. (John Middleton), 1796-1856. John M. Clayton papers, 1798-1868.
- Clements, M. A. (McKenzie Alexander), 1942- Ellerton-Clements cyphering book collection. 1666-2021.
- Clements, M. A. (McKenzie Alexander), 1942- Ellerton-Clements cyphering book collection. 1666-2021. Ellerton-Clements cyphering book collection, 1666-2021.
- Clinton family. Clinton family papers, 1776-1806.
- Clinton family papers, 1776-1806.
- Clinton, George, 1739-1812. George Clinton papers.
- Clinton, George, 1771-1809. George Clinton papers.
- Clinton, James, 1736-1812. James Clinton papers.
- Coan family. Titus Coan family papers, 1818-1923.
- Coan, Titus, 1801-1882. Titus Coan family papers, 1818-1923.
- Coblentz, Catherine Cate, 1897-1951. Matthew Fontaine Maury biography. 1953.
- Cockburn, George, Sir, 1772-1853. Sir George Cockburn papers, 1788-1847.
- Colfax, Schuyler, 1823-1885. Schuyler Colfax correspondence and speeches, 1837-1882.
- Colhoun, Edmund Ross, 1821-1897. Edmund Ross Colhoun papers, 1821-1918.
- Coll y Toste, Cayetano, 1850-1930. Cayetano Coll y Toste collection relating to Puerto Rico, 1850-1894.
- Columbus Delano family papers, 1845-1889.
- Confederate States of America. Army. Confederate States of America. Army records. 1860-1865.
- Conner, David, 1792-1856. David Conner papers, 1817-1847.
- Connor, Jeannette Thurber, 1872-1927. Jeannette Thurber Connor collection of Floridiana, 1570-1927.
- Converse, Marion Singleton Deveaux, 1815- Marion Singleton Deveaux Converse papers.
- Cook, Ransom. Ransom Cook papers.
- Cooper Curtice papers, 1822-1953.
- Corbin, Hannah Lee, 1728-1782. Hannah Lee Corbin papers.
- Corcoran, Thomas, Jr., 1754-1830. Thomas Corcoran, Jr., correspondence and financial records.
- Corcoran, W. W. (William Wilson), 1798-1888. W.W. Corcoran papers, 1791-1896.
- Cornelius Chase family papers, 1745-1974.
- Cox, Henry Bartholomew. Henry Bartholomew Cox collection, 1492-1960.
- Crittenden, John J. (John Jordan), 1787-1863. John J. Crittenden papers, 1782-1913.
- Crofoot, Herman K. Herman K. Crofoot collection of Francis Elias Spinner papers. 1792-1908.
- Cruikshank, Robert. Robert Cruikshank daybook and letterbook. 1827-1831.
- Curtice, Cooper, 1856-1939. Cooper Curtice papers, 1822-1953.
- Curtis, William T. S. William T.S. Curtis papers.
- Cushing, Caleb, 1800-1879. Caleb Cushing papers, circa 1785-1906.
- Custis family. Custis-Lee family papers, 1700-circa 1928.
- Custis family papers.
- Custis, George Washington Parke, 1781-1857. George Washington Parke Custis papers.
- Custis-Lee family papers, 1700-circa 1928.
- Cutts family. Cutts family papers, 1755-1957.
- Cutts family. Key-Cutts-Turner family papers, 1808-1975.
- Cutts family papers, 1755-1957.
- Cutts, Richard, 1771-1845. Richard Cutts papers.
D
- Dahlgren, John Adolphus Bernard, 1809-1870. John Adolphus Bernard Dahlgren papers, 1794-1889.
- Dale, Richard, 1756-1826. Richard Dale papers, 1778-1918.
- Danforth-Bush family collection, 1721-2007.
- Danforth family. Danforth-Bush family collection, 1721-2007.
- Danforth family papers.
- Danforth, Jane Janvier Whilldin, 1797-1870. Jane Janvier Whilldin Danforth papers.
- Danforth, Joshua N. (Joshua Noble), 1798-1861. Joshua N. Danforth papers.
- Daniel Carroll papers, 1662-1920.
- Daniel Dodge Brodhead papers, 1821-1853.
- Daniel Edgar Sickles papers, 1821-1918.
- Daniel Todd Patterson papers, 1772-1927.
- Daniel Webster papers, 1800-1900.
- Davenport, Thomas, 1802-1851. Thomas Davenport correspondence, 1836-1837.
- David Bailie Warden papers, 1800-1840.
- David Banister Morgan papers, 1804-1819.
- David Conner papers, 1817-1847.
- David D. Porter family papers, 1799-1899.
- David Glasgow Farragut papers, 1816-1869.
- David Homer Bates papers, 1837-1926.
- Davis, J. C. Bancroft (John Chandler Bancroft), 1822-1907. J.C. Bancroft Davis papers, 1849-1902.
- 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.
- Deane, Ruthven 1851-1934. Ruthven Deane bookplate collection.
- DeButts-Ely collection of Lee family papers, 1749-1914.
- Decatur, Stephen, 1779-1820. Stephen Decatur papers.
- Declaration of Independence collection, 1776-1942.
- Del Monte, Domingo, 1804-1853. Domingo Del Monte collection of Spanish colonial history, 1500-1871.
- Delano, Columbus, 1809-1896. Columbus Delano family papers, 1845-1889.
- Delano, John Sherman, 1841-1896. John Sherman Delano papers.
- Denver, James William, 1817-1892. James William Denver papers, 1847-1884.
- Desha, John R., 1804-1878. Joseph Desha and John R. Desha papers. 1773-1871.
- Desha, Joseph, 1768-1842. Joseph Desha and John R. Desha papers, 1773-1871.
- Desha, Mary, 1850-1911. Mary Desha papers.
- Dessu, Ellen Key Turner, 1831- Ellen Key Turner Dessu commonplace book. 1847-1854.
- Dietrich Hecht collection of Bilderbogen.
- Digges, Thomas Attwood, 1742-1821. Thomas Attwood Digges papers.
- Digges, William Dudley, 1790-1830. William Dudley Digges papers.
- Diggins, E. F. E.F. Diggins plaster bust of Walt Whitman. 1939.
- District of Columbia. Levy Court (Washington County) District of Columbia. Levy Court (Washington County) minutes. 1835-1847.
- Dolley Madison papers, 1794-1852.
- Dolphin (Schooner : 1821-1835). USS Ontario and USS Dolphin journals and logbooks. 1817-1821.
- Domingo Del Monte collection of Spanish colonial history, 1500-1871.
- Domingo Del Monte papers.
- Donelson, Andrew Jackson, 1799-1871. Andrew Jackson Donelson papers, 1779-1943.
- Doolittle, Annette Danforth Bush, -1824. Joshua N. Danforth biography. 2007.
- Dorsett, Edward Lee, 1883- Edward Lee Dorsett naval historical collection, 1814-1926.
- Duff Green papers, 1716-1883.
- Dunant, Edward. Edward Dunant papers.
- Duncan Emrich autograph album collection, 1843-1956.
- Duncan McArthur papers, 1783-1848.
- Dunlop family. Dunlop family papers, 1713-1930.
- Dunlop family papers, 1713-1930.
- Dunlop, Francis Key. Francis Key Dunlop papers. 1844.
- Dunlop, James, 1724-1790. James Dunlop papers.
- Dunlop, James, 1755-1824. James Dunlop papers.
- Dunlop, James, 1793- James Dunlop papers.
- Dunlop, Robert P., -1869. Robert P. Dunlop papers.
- Dunlop, William, active 1739. William Dunlop papers. 1847-1858.
- Dupuis-Delcourt, 1802-1864. Tissandier collection on the history of aeronautics. 1539-1929.
E
- Earle, William E. (William Edward), 1841-1894. William E. Earle papers.
- Early, Jubal Anderson, 1816-1894. Jubal Anderson Early papers, 1829-1930.
- East Florida papers, 1737-1858.
- East Florida records.
- E.B. O'Callaghan papers, 1830-1879.
- Ebenezer Foote family papers, 1751-1871.
- Ebenezer Jackson papers, 1784-1873.
- Edgar Stanton Maclay papers, 1782-circa 1918.
- Edmund Burke papers, 1821-1881.
- Edmund Physick family papers, 1759-1899.
- Edmund Roberts papers, 1803-1905.
- Edmund Ross Colhoun papers, 1821-1918.
- Edward Frost papers, 1795-1901.
- Edward Lee Dorsett naval historical collection, 1814-1926.
- Edward Maynard papers, 1836-1867.
- Edward Miner Gallaudet papers.
- Edward Preble papers, 1680-1912.
- Edward W. Washburn family papers, 1817-1934.
- Edwards Pierrepont papers, 1847-1900.
- E.F. Ellet correspondence with index, 1835-1865.
- E.F. Ellet papers.
- E.G. Squier papers, 1809-1888.
- Elbridge Gerry papers, 1772-1901.
- Eliakim Littell correspondence, 1819-1869.
- Eliakim Littell papers.
- Elizabeth Burt papers, 1797-1917.
- Elizabeth Cady Stanton papers, 1814-1946.
- Elizabeth Fries Ellet papers.
- Elizur Wright papers, 1793-1935.
- Ellerton-Clements cyphering book collection, 1666-2021.
- Ellerton, Nerida F. (Nerida Fay), 1942- Ellerton-Clements cyphering book collection. 1666-2021.
- Ellerton, Nerida F. (Nerida Fay), 1942- Ellerton-Clements cyphering book collection. 1666-2021. Ellerton-Clements cyphering book collection, 1666-2021.
- Ellet, E. F. (Elizabeth Fries), 1818-1877. E.F. Ellet correspondence with index, 1835-1865.
- Ellicott, Andrew, 1754-1820. Andrew Ellicott papers, 1777-1829.
- Ellis & Allan Company records, 1795-1889.
- Ellis & Allan Company (Richmond, Va.). Ellis & Allan Company records, 1795-1889.
- Ellsworth family. Oliver Ellsworth family papers, 1762-1907.
- Ellsworth, Henry William, 1814-1864. Henry William Ellsworth papers, 1796-1886.
- Ellsworth, Oliver, 1745-1807. Oliver Ellsworth family papers, 1762-1907.
- Elmore, F. H. (Franklin Harper), 1799-1850. F.H. Elmore papers, 1795-1858.
- Emrich, Duncan, 1908-1977. Duncan Emrich autograph album collection, 1843-1956.
- Engineering Societies Library. Engineering Societies Library map collection.
- Engineering Societies Library map collection.
- Ephraim George Squier papers.
- Ericsson, John, 1803-1889. John Ericsson papers, 1821-1890.
- Ernest Cushing Richardson collection of French and Italian manuscripts, 1179-1825.
- Ethan Allen Hitchcock papers, 1793-1888.
- Ethel Armes collection of Lee family papers, 1671-1936.
- Ethel M. Fair map collection.
- Eustis, Benjamin. Benjamin Eustis papers.
- Eustis, Caroline Langdon, 1781-1865. Caroline Langdon Eustis papers.
- Eustis, William, 1753-1825. William Eustis papers, 1757-1908.
- Everett, Alexander Hill, 1790-1847. Alexander Hill Everett papers.
- Ewing family. Thomas Ewing family papers, 1757-1941.
- Ewing, Hugh, 1826-1905. Hugh Ewing papers.
- Ewing, Thomas, 1789-1871. Thomas Ewing family papers, 1757-1941.
- Ewing, Thomas, 1829-1896. Thomas Ewing papers.
- Ewing, Thomas, 1862-1942. Thomas Ewing papers.
F
- Fair, Ethel M. (Ethel Marion). Ethel M. Fair map collection.
- Fairfield, John, 1797-1847. John Fairfield correspondence, 1828-1876.
- Falls Bridge Turnpike Company. Falls Bridge Turnpike Company daybooks. 1836-1852.
- Farquhar, William, 1774-1839. William Farquhar correspondence and other Malay letters, 1812-1832.
- Farragut, David Glasgow, 1801-1870. David Glasgow Farragut papers, 1816-1869.
- Feamster family. Feamster family papers. 1794-1967.
- Feamster family papers, 1794-1967.
- 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.
- Fell, Jesse W., 1808-1887. Jesse W. Fell papers, 1806-1965.
- Felt, Joseph B. (Joseph Barlow), 1789-1869. Joseph Barlow Felt papers. 1822-1832.
- Fernández Carballido, Rufo Manuel, 1790-1855. Rufo Manuel Fernández Carballido papers.
- F.H. Elmore papers, 1795-1858.
- 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.
- Fillmore, Millard, 1800-1874. Millard Fillmore papers, 1839-1925.
- First Church in Albany. First Church in Albany records. 1780.
- Fish, Hamilton, 1808-1893. Hamilton Fish papers, 1732-1914.
- Fisher, George P. (George Purnell), 1817-1899. George P. Fisher papers, 1772-1905.
- 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, Samuel Wheelock, 1828-1864. Samuel Wheelock Fiske papers.
- Floyd, Charles Rinaldo, 1797-1845. Charles Rinaldo Floyd papers. 1816-1845.
- Floyd family. Campbell-Preston-Floyd families papers, 1741-1931.
- Floyd family. Floyd-McAdoo families papers, 1806-1894.
- Floyd family papers.
- Floyd, John, 1769-1839. John Floyd letterbooks and estate book. 1806-1830.
- Floyd-McAdoo families papers, 1806-1894.
- Foote, Andrew H. (Andrew Hull), 1806-1863. Africa and the American flag. 1854.
- Foote, Andrew H. (Andrew Hull), 1806-1863. Andrew H. Foote papers, 1822-1890.
- Foote, Charles Augustus, 1785-1828. Charles Augustus Foote papers.
- Foote, Charles Augustus, 1818-1883. Charles Augustus Foote papers.
- Foote, Ebenezer, 1756-1829. Ebenezer Foote family papers, 1751-1871.
- Foote family. Ebenezer Foote family papers, 1751-1871.
- Foote, Frederick Parsons, 1783-1827. Frederick Parsons Foote papers.
- Foote, Harriet, 1773-1842. Harriet Foote papers.
- Foote, Justin, 1762- Justin Foote papers.
- Foote, Rensselaer, 1815-1862. Rensselaer Foote papers.
- Force, Peter, 1790-1868. Peter Force papers and collection, 1492-1977.
- Force, William Q. (William Quereau), 1820-1880. William Q. Force papers. 1800-1944.
- Foster, Augustus John, Sir, 1780-1848. Sir Augustus John Foster papers, 1794-1844.
- Fowler, William Chauncey, 1793-1881. William Chauncey Fowler papers.
- Fox, Gustavus Vasa, 1821-1883. Gustavus Vasa Fox papers.
- Fox, Virginia L. Woodbury Virginia L. Woodbury Fox correspondence and diary.
- Francis Asbury Roe papers, 1842-1901.
- Francis Baylies papers, 1814-1843.
- Francis Lieber correspondence and essay, 1830-1872.
- Francis Lieber papers.
- Francis Maria Scala collection, 1816-2013.
- Francis Maria Scala papers, 1816-2013.
- Francis O. J. Smith papers.
- Francis O.J. Smith digest of congressional reports, 1844.
- Francis Ormond Jonathan Smith papers.
- Francis Scala papers, 1816-2013.
- Francis Winslow papers, 1833-1863.
- Frank Alden Hill genealogical collection, 1627-1897.
- Frank Alden Hill papers.
- Franklin Pierce papers, 1820-1869.
- Frederick Law Olmsted papers, 1777-1952.
- Frederick West Lander papers.
- Frémont, Jessie Benton, 1824-1902. John Charles Frémont and Jessie Benton Frémont papers. 1828-1980.
- Frémont, John Charles, 1813-1890. John Charles Frémont and Jessie Benton Frémont papers, 1828-1980.
- French, Benjamin B. (Benjamin Brown), 1800-1870. Benjamin B. French family papers, 1778-1940.
- French family. Benjamin B. French family papers, 1778-1940.
- French family papers.
- French, Francis O. (Francis Ormond), 1837-1893. Francis O. French papers.
- Frewen, Moreton, 1853-1924. Moreton Frewen papers, 1823-1934.
- Frewen, Richard, 1852-1896. Richard Frewen correspondence and journals. 1872-1876.
- Frič, Alberto Vojtěch, 1882-1944. Alberto Vojtěch Frič papers.
- Friedman, Harry T. Harry T. Friedman collection of Spanish American documents, circa 1500-1912.
- Frost, Edward, 1801-1868. Edward Frost papers, 1795-1901.
- Fuller, Melville Weston, 1833-1910. Melville Weston Fuller papers, 1794-1949.
- Furness, Clifton Joseph, 1898-1946. Clifton Joseph Furness notebook. 1941.
- F.W. Lander and J.M. Lander papers, 1836-1894.
- F.W. Lander papers.
G
- 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.
- Galloway family. Galloway-Maxcy-Markoe families papers, 1654-1888.
- Galloway family. Joseph Galloway family papers, 1743-1823.
- Galloway, John, -1810. John Galloway papers.
- Galloway, Joseph, 1731-1803. Joseph Galloway family papers, 1743-1823.
- Galloway-Maxcy-Markoe families papers, 1654-1888.
- Galloway, Samuel, 1720-1785. Samuel Galloway papers.
- Garber, Benjamin Franklin, 1927-2001. Benjamin Garber papers, 1916-2009.
- Garfield, Abram, 1872- Abram Garfield papers.
- Garfield, Irvin McDowell, 1870-1951 Irvin McDowell papers.
- Garfield, Lucretia Rudolph, 1832-1918. Lucretia Rudolph Garfield papers, 1807-1958.
- Garrett, Henry S. (Henry Stouffer), 1818-1867. Henry S. Garrett papers.
- Garrett, John W. (John Work), 1820-1884. John W. Garrett papers.
- Garrett, Robert, 1783-1857. Robert Garrett family papers, 1778-1925.
- Gary W. North map collection.
- George B. McClellan papers, 1838-1922.
- George Hodges collection, circa 1790-circa 1909.
- George Kennan papers, 1840-1937.
- George Nicholas Sanders family papers, 1833-1973.
- George P. Fisher papers, 1772-1905.
- George P. Merrill correspondence and autographs, 1803-1926.
- George P. Merrill papers.
- George Perkins Merrill papers.
- George Pope Morris papers, 1832-1862.
- George Purnell Fisher papers.
- George Redington papers, 1804-1907.
- George Thompson and Frederick W. Chesson scrapbooks.
- George Washington Julian papers.
- George Watterston papers, 1809-1866.
- Georgetown and Leesburg Turnpike Company. Georgetown and Leesburg Turnpike Company daybooks. 1816-1836.
- Georgetown (Washington, D.C.). Board of Commissioners. Georgetown (Washington, D.C.) Board of Commissioners minutes. 1751-1789.
- Georgetown (Washington, D.C.) Corporation. Georgetown (Washington, D.C.) Corporation government records, 1751-1881.
- Georgetown (Washington, D.C.) Corporation government records, 1751-1881.
- German captured documents collection, 1766-1945.
- Gerry, Elbridge, 1744-1814. Elbridge Gerry papers, 1772-1901.
- Gertrude Clarke Whittall Foundation collection on Nicolò Paganini, 1810-1967.
- Gertrude Clarke Whittall Foundation Paganini Collection.
- Gibbes, Lewis Reeves, 1810-1894. Lewis Reeves Gibbes papers, 1793-1894.
- Giddings, Joshua R. (Joshua Reed), 1795-1864. Joshua R. Giddings and George Washington Julian papers, 1839-1899.
- Gideon Welles papers, 1777-1911.
- Gifford Pinchot map collection.
- Gillespie, David, 1774-1829. David Gillespie papers. 1777-1801.
- Gilpin, Joshua, 1765-1841. Joshua Gilpin papers.
- Glassford, John, 1715-1783. John Glassford papers.
- Goldsborough, Louis Malesherbes, 1805-1877. Louis Malesherbes Goldsborough papers, 1797-1874.
- Goodell, William, 1792-1867. William Goodell papers, 1818-1917.
- Gould, Alice Bache, 1868-1953. Alice Bache Gould papers.
- Gouverneur Morris papers, 1771-1834.
- Grant, Julia Dent, 1826-1902. Julia Dent Grant correspondence and memoirs.
- Grant, Ulysses S. (Ulysses Simpson), 1822-1885. Ulysses S. Grant papers, 1819-1974.
- Gray, Asa, 1810-1888. Asa Gray papers, 1840-1859.
- G.R.B. Horner papers, 1826-1911.
- Great Britain. Royal Navy. British Royal Navy logbooks, 1808-1840.
- Green, Duff, 1791-1875. Duff Green papers, 1716-1883.
- Gresham, LeRoy Wiley, 1847-1865. LeRoy Wiley Gresham papers.
- Griswold, Whiting, 1814-1874. Whiting Griswold correspondence, 1843-1874.
- Gurley, Ralph Randolph, 1797-1872. Ralph Randolph Gurley papers, 1825-1931.
- Gurowski, Adam, 1805-1866. Adam Gurowski papers, 1743-1898.
- Gwinn, John, 1791-1849. John Gwinn papers, 1815-1864.
H
- Hack, Charles W. Charles W. Hack papers, circa 1800-1926.
- 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.
- Halliwell-Phillipps, J. O. (James Orchard), 1820-1889. J.O. Halliwell-Phillipps collection, 1576-circa 1852.
- Halsted B. VanderPoel literary collection, 1815-1929.
- Hamilton, Alexander, 1757-1804. Alexander Hamilton papers, 1708-1917.
- Hamilton Fish papers, 1732-1914.
- Hammer, Armand, 1898-1990. Armand Hammer papers, circa 1508-1989.
- Hammond, James Henry, 1807-1864. James Henry Hammond papers, 1774-1875.
- 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.
- 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.
- Harman Blennerhassett papers, 1755-1866.
- Harrison family papers.
- Harrison family. Short-Harrison-Symmes families papers, 1760-1878.
- Harrison, James O., 1804-1888. James O. Harrison papers, 1803-1913.
- Harrison, John Cleves Symmes, 1798-1830. John Cleves Symmes Harrison papers.
- Harrison, John Scott, 1804-1878. John Scott Harrison papers.
- Harrison, William Henry, 1773-1841. William Henry Harrison papers.
- Harrison, William Henry, 1773-1841. William Henry Harrison papers, 1734-1939.
- Harrison, William Henry, 1802-1838. William Henry Harrison papers.
- Harry Innes papers, 1754-1900.
- Harry T. Friedman collection of Spanish American documents, circa 1500-1912.
- Harry T. Friedman papers.
- Hart, Ira. Ira Hart sermon notes.
- Hartt, Charles Frederick, 1840-1878. Charles Frederick Hartt papers.
- Harvey, Charles Henry, 1830-1896. Charles Henry Harvey papers, 1835-1965.
- Harvey, Joanne. Joanne Harvey diaries. 1851-1857.
- Harwood family. Harwood family papers, 1767-1940.
- Harwood family papers, 1767-1940.
- Hauslab, Franz, 1798-1883 Hauslab-Liechtenstein map collection.
- Hauslab-Liechtenstein map collection.
- Hawley, Joseph R. (Joseph Roswell), 1826-1905. Joseph R. Hawley papers, 1638-1906.
- Hay, John, 1838-1905. John Hay papers. 1861-1959.
- Hecht, Dietrich. Dietrich Hecht collection of Bilderbogen.
- Helen Keller papers, 1842-1954.
- Henry A. Willard II collection, 1743-1888.
- Henry Albert Monday collection relating to Mexico, 1522-1935.
- Henry Bartholomew Cox collection, 1492-1960.
- Henry Clay family papers, 1732-1927.
- Henry L. Abbot family papers, 1770-2001.
- Henry L. Dawes papers, 1833-1933.
- Henry Mason Morfit papers, 1819-1858.
- Henry Pelham Holmes Bromwell papers, 1794-1929.
- Henry Rowe Schoolcraft papers, 1788-1941.
- Henry Ward Beecher papers, 1836-1886.
- Henry William Ellsworth papers, 1796-1886.
- Henry Woodhouse collection relating to George Washington, 1656-1930.
- Herman K. Crofoot collection of Francis Elias Spinner papers, 1792-1908.
- Herndon family. Charles Pinkerton collection of Arthur and Herndon family papers, 1822-1938.
- Herndon family papers.
- Herndon-Weik collection of Lincolniana, circa 1824-1933.
- Herndon, William Henry, 1818-1891. William Henry Herndon papers. 1849-1891.
- Hill, Frank Alden. Frank Alden Hill genealogical collection, 1627-1897.
- Hillard, Harriet Low, 1809-1877. Harriet Low Hillard papers.
- Himmler, Heinrich, 1900-1945. Himmler Files.
- Hitchcock, Ethan Allen, 1798-1870. Ethan Allen Hitchcock papers, 1793-1888.
- Hitchcock, Samuel, 1808-1851. Samuel Hitchcock papers.
- Hitt, Robert R. (Robert Roberts), 1834-1906. Robert R. Hitt papers, 1830-1906.
- Hodges collection, circa 1790-circa 1909.
- Hodges family collection, circa 1790-circa 1909.
- Hodges family. Hodges family collection, circa 1790-circa 1909.
- Hodges, Samuel, Jr., 1792-1827. Samuel Hodges, Jr., journal and correspondence, 1822-1827.
- Holker, John, 1745-1822. John Holker papers, 1777-1822.
- Hollins, John. John Hollins papers.
- Hollins, Robert. Robert Hollins papers.
- Hollins, Thomas. Thomas Hollins 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.
- Holten, Samuel, 1738-1816. Samuel Holten papers, 1630-1843.
- Hooper, Samuel, 1808-1875. Samuel Hooper papers, 1829-1874.
- Hopkins, Cornelia Lee, 1780-1815. Cornelia Lee Hopkins papers.
- Horner, G. R. B. (Gustavus Richard Brown), 1804-1892. G.R.B. Horner papers, 1826-1911.
- Horner, Mabel Carlton, 1872-1961. Mabel Carlton Horner biography of Caleb Henry Carlton.
- Horr family papers.
- Horr family. Stiles, Horr, and Bonney families papers, 1803-1907.
- Horsford family. Horsford-Tryon families papers, 1800-2000.
- Horsford family papers.
- Horsford-Tryon families papers, 1800-2000.
- Howe, Julia Ward, 1819-1910. Julia Ward Howe papers, 1845-1917.
- Howe, Letitia T. Letitia T. Howe collection, 1822-1876.
- Hubbard family papers, 1639-1925.
- Hubbard, Gardiner G. (Gardiner Greene), 1822-1897. Gardiner G. Hubbard papers.
- Hubbard, Gertrude Mercer McCurdy, 1827-1909. Gertrude Mercer McCurdy Hubbard papers.
- Hubbard, Robert J. Robert J. Hubbard lecture.
- Hubbard, Samuel, 1785-1847. Samuel Hubbard papers.
- Hubbard, Thomas H. (Thomas Hill), 1781-1857. Thomas H. Hubbard papers, 1817-1823.
- Hugh Lenox Scott papers, 1582-1981.
- Hugh T. Taggart collection relating to the District of Columbia and Maryland, 1751-1889.
- Hughes, C. R. C. R. Hughes Embargo Act of 1807 map tracings collection.
- Humphrey Marshall papers, 1771-2002.
- Hunsberger, George S., 1914- George S. Hunsberger papers.
I
- Innes, Harry, 1752-1816. Harry Innes papers, 1754-1900.
- Institute of the Aerospace Sciences archives, 1783-1962.
- Institute of the Aerospace Sciences. Institute of the Aerospace Sciences archives.
- Irene Aloha Wright papers, 1620-1977.
- Israel Perlstein collection relating to Imperial Russia, 1613-1914.
- Iturbide, Agustín de, 1783-1824. Agustín de Iturbide papers, 1799-1880.
- I︠U︡din, G. V. (Gennadiĭ Vasilʹevich), 1840-1912. Yudin collection of Russian-American Company records, 1783-1946.
- Izard, Elizabeth C. (Elizabeth Carter), approximately 1774-1826. Elizabeth C. Izard papers.
- Izard family. Ralph Izard family papers, 1778-1826.
- Izard, Ralph, 1742-1804. Ralph Izard family papers, 1778-1826.
J
- Jackson, Andrew, 1767-1845. Andrew Jackson papers, 1775-1874.
- Jackson, Ebenezer, 1763-1837. Ebenezer Jackson papers, 1784-1873.
- Jacob B. Schoener family papers, 1752-2009.
- Jacob Gerhard Koch papers, 1783-1941.
- James A. Bayard and Richard H. Bayard papers, 1797-1885.
- James A. Bayard papers.
- James Brown papers, 1765-1867.
- James Buchanan and Harriet Lane Johnston papers, 1825-1887.
- James Dudley Morgan collection of Digges-L'Enfant-Morgan papers, 1674-1923.
- James Fowler Simmons map collection.
- James Fowler Simmons papers, 1771-1939.
- James Gillespie Birney papers, 1830-circa 1895.
- James Henry Hammond papers, 1774-1875.
- James K. Polk papers, 1775-1891.
- James Kent papers, 1779-1854.
- James Knight and Walter C. White papers, 1825-1867.
- James L. Cathcart papers, 1785-1817.
- James Leander Cathcart papers.
- James Madison papers, 1723-1859.
- James McHenry papers, 1775-1862.
- James Monroe papers, 1758-1839.
- James O. Harrison papers, 1803-1913.
- James Orchard Halliwell-Phillipps papers.
- James Sever papers, 1764-1959.
- James T. Mitchell collection of American book illustrations and portrait prints.
- James Thomas Ward papers, 1838-1897.
- James Wadsworth family papers, 1730-1959.
- James William Denver papers, 1847-1884.
- Jarnac, Charles Rosalie de Rohan-Chabot, comte de. Charles Rosalie de Rohan-Chabot, comte de Jarnac, papers.
- Jarnac, Louis Charles Guillaume de Rohan-Chabot, comte de, 1780-1875. Louis Charles Guillaume de Rohan-Chabot, comte de Jarnac, papers.
- Jarnac, Philippe-Ferdinand-Auguste de Rohan-Chabot, comte de, 1815-1875. Philippe-Ferdinand-Auguste de Rohan-Chabot, comte de Jarnac, papers.
- Jay I. Kislak Collection, 2000 BCE-2007 CE.
- Jay I. Kislak collection of the archaeology and history of the early Americas.
- J.C. Bancroft Davis papers, 1849-1902.
- Jean Margaret Lander papers.
- Jeannette Thurber Connor collection of Floridiana, 1570-1927.
- Jefferson, Thomas, 1743-1826. Thomas Jefferson papers, 1606-1943.
- Jenckes, Thomas A. (Thomas Allen), 1818-1875. Thomas A. Jenckes papers, 1836-1878.
- Jennie Lorenz collection relating to Charlotte Cushman, 1830-1960.
- Jennie Lorenz papers.
- Jesse W. Fell papers, 1806-1965.
- Jesup, Thomas Sidney, 1788-1860. Thomas Sidney Jesup papers, 1780-1907.
- J.M. Lander papers.
- J.N. Nicollet papers, 1797-1843.
- J.O. Halliwell-Phillipps collection, 1576-circa 1852.
- J.O. Halliwell-Phillipps papers.
- Job Pierson family papers, 1755-1908.
- John Adolphus Bernard Dahlgren papers, 1794-1889.
- John Aldrich Stephenson collection of the Hand, Fiske, and Aldrich families papers, 1745-1966.
- John Bell papers, 1815-1861.
- John C. Calhoun papers, 1818-1850.
- John C. Calhoun papers in the Library of Congress.
- John Caldwell Calhoun papers.
- John Charles Frémont and Jessie Benton Frémont papers, 1828-1980.
- John Charles Frémont papers.
- John Davis Batchelder collection of manuscripts, 1537-1944.
- John Davis Batchelder ephemera and special collections, 2200 BCE-1948.
- John Dean Caton papers, 1826-1947.
- John Ericsson papers, 1821-1890.
- John Fairfield correspondence, 1828-1876.
- John Fairfield papers.
- John Glassford and Company. John Glassford and Company records, 1743-1886.
- John Glassford and Company records, 1743-1886.
- John Gwinn papers, 1815-1864.
- John Holker papers, 1777-1822.
- John J. Crittenden papers, 1782-1913.
- John James Beckley family papers, 1789-1918.
- John Keep papers, 1781-1929.
- John Leeds Bozman family papers, 1688-1883.
- John Loyall Saunders papers, 1844-1857.
- John M. Clayton papers, 1798-1868.
- John Marshall papers.
- John McLean papers, 1816-1866.
- John Middleton Clayton papers.
- John Nicholson family papers, 1786-1868.
- John R. Desha papers.
- John Randolph correspondence and diaries, 1803-1834.
- John Randolph papers.
- John Richardson Latimer papers, 1679-1906.
- John Shaw papers, 1798-1895.
- John Tyler papers, 1691-1918.
- John Warren Williams family papers, 1839-1895.
- John White Stevenson papers.
- Johnson, Reverdy, 1796-1876. Reverdy Johnson papers, 1830-1876.
- Johnston, Harriet Lane, 1830-1903. James Buchanan and Harriet Lane Johnston papers. 1825-1887.
- Johnston, John, 1762-1828. John Johnston papers.
- Johnston, John, 1852-1927. John Johnston papers.
- Jonathan D. Meredith papers, 1795-1859.
- Jones, Elizabeth Cocke Pratt, 1701-1762. Elizabeth Cocke Pratt Jones papers.
- Jones family. Roger Jones family papers, 1649-1896.
- Jones, Frederick, -1722. Frederick Jones papers.
- Jones, Roger, 1625?-1701. Roger Jones papers.
- Jones, Thomas, 1726-approximately 1785. Thomas Jones papers.
- Jones, Thomas ap Thomas, 1782-1843. Thomas ap Thomas Jones papers.
- Jones, Thomas, -approximately 1757. Thomas Jones papers.
- Jones, Thomas, -approximately 1800. Thomas Jones papers.
- Jones, Walter, 1745-1815. Walter Jones papers.
- Joseph Desha and John R. Desha papers, 1773-1871.
- Joseph Desha papers.
- Joseph Galloway family papers, 1743-1823.
- Joseph Hopper Nicholson papers, 1789-1827.
- Joseph J. Roberts family papers, 1839-2001.
- Joseph Jenkins Roberts family papers.
- Joseph M. Toner papers.
- Joseph Meredith Toner collection of manuscripts, 1741-1896.
- Joseph Meredith Toner papers.
- Joseph R. Hawley papers, 1638-1906.
- Joseph Sewall papers, 1832-1907.
- Joseph Story correspondence, 1807-1843.
- Joseph Story papers.
- Joshua Lawrence Chamberlain papers, 1775-1913.
- Joshua R. Giddings and George Washington Julian papers, 1839-1899.
- Joshua R. Giddings papers.
- Joshua Reed Giddings papers.
- Josiah Bartlett family papers, 1710-1931.
- Jubal Anderson Early papers, 1829-1930.
- Julia Ward Howe papers, 1845-1917.
- Julian, George W. (George Washington), 1817-1899. Joshua R. Giddings and George Washington Julian papers. 1839-1899.
- Justin G. Turner autograph collection, 1763-1968.
- J.W. Stevenson papers.
K
- Kalisky, Louisa, active 1823-1827. Louisa Kalisky papers.
- Katharine McCook Knox papers, 1802-1975.
- Keep, John, 1781-1870. John Keep papers, 1781-1929.
- Keller, Helen, 1880-1968. Helen Keller papers, 1842-1954.
- Kendall, Amos, 1789-1869. Amos Kendall papers, 1835-1909.
- Kennan, George, 1845-1924. George Kennan papers, 1840-1937.
- Kent, James, 1763-1847. James Kent papers, 1779-1854.
- Kern, Richard H., 1821-1853. Richard H. Kern diary. 1848-1849.
- Kerr, John Bozman, 1809-1878. John Bozman Kerr papers.
- Kerr, John Leeds, 1780-1844. John Leeds Kerr papers.
- Key-Cutts-Turner family papers, 1808-1975.
- Key family. Key-Cutts-Turner family papers, 1808-1975.
- Key, Francis Scott, 1779-1843. Francis Scott Key correspondenc and poetry.
- King family. Nicholas King family papers, 1792-1987.
- King, N. (Nicholas), 1771-1812. Nicholas King family papers, 1792-1987.
- King, Rt. (Robert), 1774 or 1775-1831. Rt. King survey notes. 1793-1795.
- Kislak, Jay I., 1922-2018. Jay I. Kislak Collection, 2000 BCE-2007 CE.
- Knight, James, 1787-1858. James Knight and Walter C. White papers, 1825-1867.
- Knox, Katharine McCook. Katharine McCook Knox papers, 1802-1975.
- Koch, Jacob Gerhard. Jacob Gerhard Koch papers, 1783-1941.
- Krueger, Karl, 1894-1979. Society for the Preservation of the American Musical Heritage collection, 1792-1969.
L
- L'Enfant, Pierre Charles, 1754-1825. Pierre Charles L'Enfant papers. 1778-1864.
- L'Enfant, Pierre Charles, 1754-1825. Pierre Charles L'Enfant papers. 1783-1793.
- La Fayette, Michel Louis Christophe Roch Gilbert Motier, marquis de, 1732-1759. Michel Louis Christophe Roch Gilbert Motier, marquis de La Fayette, papers.
- La Tour-Maubourg, Anastasie du Motier de La Fayette, comtesse de, 1777-1863. Anastasie du Motier de La Fayette, comtesse de La Tour-Maubourg, papers.
- Lafayette, Georges Washington Louis Gilbert Du Motier, marquis de, 1779-1849. Georges Washington Louis Gilbert Du Motier, marquis de Lafayette, papers.
- Lafayette, Marie Adrienne de Noailles, marquise de, 1759-1807. Marie Adrienne de Noailles, marquise de Lafayette, papers.
- 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.
- Lafayette, Marie Joseph Paul Yves Roch Gilbert Du Motier, marquis de, 1757-1834. Marquis de Lafayette papers, 1757-1990.
- Lander, F. W. (Frederick West), 1821-1862. F.W. Lander and J.M. Lander papers, 1836-1894.
- Lander, J. M. (Jean Margaret), 1829-1903. F. W. Lander and J.M. Lander papers. 1836-1894.
- Lane, J. F., active 1834-1835. J.F. Lane letterbook. 1834-1835.
- Lasteyrie du Saillant, Adrien-Jules, marquis de, 1810-1883. Adrien-Jules, marquis de Lasteyrie du Saillant, papers.
- Lasteyrie du Saillant, Louis, marquis de, 1781-1826. Louis, marquis de Lasteyrie du Saillant, papers.
- Lasteyrie du Saillant, Olivia de Rohan-Chabot, marquise de, 1813-1899. Olivia de Rohan-Chabot, marquise de Lasteyrie du Saillant, papers.
- Lasteyrie du Saillant, Virginie du Motier de La Fayette, marquise de, 1782-1849. Virginie du Motier de La Fayette, marquise de Lasteyrie du Saillant, papers.
- Lathers, Richard, 1820-1903. Richard Lathers papers, 1826-1901.
- Lathrop, William Addison. William Addison Lathrop papers.
- Latimer, John Richardson, 1793-1855. John Richardson Latimer papers, 1679-1906.
- Latrobe architectural drawing archive (Library of Congress).
- Latrobe, Benjamin Henry, 1764-1820. Benjamin Henry Latrobe papers, 1803-1817. (2)
- Latrobe, Benjamin Henry, 1764-1820 Latrobe architectural drawing archive (Library of Congress).
- Latrobe collection.
- Law, Elizabeth Parke Custis, 1776-1832. Elizabeth Parke Custis Law papers.
- Lawrence Van Buren family papers, 1721-1938.
- Lawton, Eba Anderson, -1919. Eba Anderson Lawton papers.
- Lear, Tobias, 1762-1816. Tobias Lear papers, 1790-1816.
- Learned, Henry Barrett, 1868-1931. Henry Barrett Learned papers.
- Lee, Ann Hill Carter, 1773-1829. Ann Hill Carter Lee papers. (2)
- Lee, Anne Robinson McCarty, 1798-1840. Anne Robinson McCarty Lee papers. (2)
- Lee, Arthur, 1740-1792. Arthur Lee papers.
- Lee, Charles, 1758-1815. Charles Lee papers.
- Lee, Charles Carter, 1798-1871. Charles Carter Lee papers.
- Lee, Elizabeth Collins, -1858. Elizabeth Collins Lee papers.
- Lee family. Custis-Lee family papers, 1700-circa 1928.
- Lee family. DeButts-Ely collection of Lee family papers, 1749-1914.
- Lee family. Ethel Armes collection of Lee family papers, 1671-1936.
- Lee family. Lee-Palfrey families papers, 1780-1932.
- Lee family papers. (3)
- Lee, Hannah Philippa Ludwell. Hannah Philippa Ludwell Lee papers.
- Lee, Henrietta Bedinger, 1810- Henrietta Bedinger Lee papers.
- Lee, Henry, 1691-1747. Henry Lee papers.
- Lee, Henry, 1756-1818. Henry Lee papers. (2)
- Lee, Henry, 1787-1837. Henry Lee papers.
- Lee, Ludwell, 1760-1836. Ludwell Lee papers.
- Lee, Mary Bland, 1704-1764. Mary Bland Lee papers.
- Lee, Mary Custis, 1835-1918. Mary Custis Lee papers.
- Lee, Mary Randolph Custis, 1807-1873. Mary Randolph Custis Lee papers. (2)
- Lee-Palfrey families papers, 1780-1932.
- Lee, Richard Bland, 1761-1827. Richard Bland Lee papers. (2)
- Lee, Richard Henry, 1732-1794. Richard Henry Lee papers.
- Lee, Richard Henry, 1794-1865. Richard Henry Lee papers.
- Lee, Robert E. (Robert Edward), 1807-1870. Robert E. Lee papers. (2)
- Lee, Susan Palfrey, 1767-1822. Susan Palfrey Lee papers.
- Lee, Thomas, 1690-1750. Thomas Lee papers. (2)
- Lee, William, 1739-1795. William Lee papers.
- Lee, William, 1772-1840. William Lee papers.
- Lee, William Henry Fitzhugh, 1837-1891. William Henry Fitzhugh Lee papers.
- Leech, Abraham. Abraham Leech correspondence and diary. 1837-circa 1881.
- Leonard Wood papers, 1825-1942.
- Letitia T. Howe collection, 1822-1876.
- Letitia T. Howe papers.
- Levi Woodbury family papers, 1638-1914.
- Levisee, Aaron Burton. Aaron Burton Levisee papers, 1847-1992.
- Levy, Fanny Yates, 1787-1891 or 1892. Fanny Yates Levy papers.
- Levy, Jacob Clavius, 1788-1875. Jacob Clavius Levy papers.
- Lewis H. Machen family papers, 1802-1938.
- Lewis, Meriwether, 1774-1809. Meriwether Lewis diary excerpt. undated.
- Lewis Reeves Gibbes papers, 1793-1894.
- Lewis Tappan papers, 1809-1903.
- Library of Congress. Foreign Copying Program. Library of Congress. Foreign Copying Program reproductions collection. (4)
- Library of Congress. Manuscript Division. Suffrage Archives. 1759-1961.
- Lieber, Francis, 1800-1872. Francis Lieber correspondence and essay, 1830-1872.
- 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, Benjamin, 1733-1810. Benjamin Lincoln papers, 1778-1806.
- Littell, Eliakim, 1797-1870. Eliakim Littell correspondence, 1819-1869.
- 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)
- Logan Pearsall Smith papers, 1760-1946.
- Loines, Mary Hillard, 1844-1944. Mary Hillard Loines papers.
- Loines, Russell Hillard. Russell Hillard Loines papers.
- Loisel, Régis. Régis Loisel account of the upper Missouri River country. 1803.
- Look, Richard M. (Richard Millard), 1916-1998. Richard M. Look map collection.
- Loper family. Palmer-Loper family papers, 1667-1994.
- Loper, R. F. (Richard F.) R.F. Loper papers.
- Lord Saltoun collection of guitar music, 1810-1850.
- Lorenz, Jennie, 1886-1962. Jennie Lorenz collection relating to Charlotte Cushman, 1830-1960.
- Louis Malesherbes Goldsborough papers, 1797-1874.
- Louis McLane correspondence, 1795-1894.
- Louis McLane papers.
- Louisiana miscellany, 1724-1837.
- Lovering, Charles T., 1846- Charles T. Lovering papers.
- Lovering family. Lovering-Taylor family papers, 1727-1926.
- Lovering, Mary Taylor, 1813- Mary Taylor Lovering papers.
- Lovering-Taylor family papers, 1727-1926.
- 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.
- Low, Nicholas, 1739-1826. Nicholas Low papers, 1773-1897.
- 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.
- Löwenberg, Paul, 1858-1931. Paul Löwenberg collection of music by the Johann Strauss and Joseph Lanner families, 1825-1929.
- Lowery, Woodbury, 1853-1906. Woodbury Lowery collection relating to Spanish settlements in the United States, 1517-1803.
- Luce, Stephen Bleecker, 1827-1917. Stephen Bleecker Luce papers, 1799-1955.
- Lucian Barbour papers, 1838-1977.
- Lucretia Rudolph Garfield papers, 1807-1958.
- Luis Aury papers, 1801-1911.
M
- Machen, Arthur Webster, 1827-1915. Arthur Webster Machen papers.
- Machen, Caroline Webster. Caroline Webster Machen papers.
- Machen, Emmeline. Emmeline Machen papers.
- Machen family. Lewis H. Machen family papers, 1802-1938.
- Machen, James P. James P. Machen papers.
- Machen, Lewis H. (Lewis Henry), 1790-1863. Lewis H. Machen family papers, 1802-1938.
- Machen, Minnie Gresham, 1849-1931. Minnie Gresham Machen papers.
- 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.
- Madison, Dolley, 1768-1849. Dolley Madison papers, 1794-1852.
- Madison, James, 1751-1836. James Madison papers, 1723-1859.
- Magic miscellanea, 1845-1955.
- Magnetic Telegraph Company. Magnetic Telegraph Company certificate account book. 1845-1860.
- Maia Bang Hohn collection on Nicolò Paganini, 1828-1835.
- Mangum, Arthur, 1741-1789. Arthur Mangum papers.
- Mangum, Charity Alston Cain, 1795-1873. Charity Alston Cain Mangum papers.
- Mangum, Priestly Hinton, 1795-1850. Priestly Hinton Mangum papers.
- Mangum, Priestly Hinton, Jr., 1829-1907. Priestly Hinton Mangum Jr. papers.
- Mangum, Willie Person, 1792-1861. Willie Person Mangum papers, 1771-1906.
- Mangum, Willie Person, Jr., 1827-1881. Willie Person Mangum Jr. papers.
- Manuscript holdings from the Library of Oliver Wendell Holmes, Jr. : ca. 1450-1935.
- Marchand, Albert Gallatin, 1811-1848. Albert Gallatin Marchand papers, 1801-1862.
- Marcy, William L. (William Learned), 1786-1857. William L. Marcy papers, 1806-1930.
- Margaret Bayard Smith papers, 1789-1874.
- Marian S. Carson collection of manuscripts, 1656-1995.
- Marian S. Carson papers.
- Marie Joseph Paul Yves Roch Gilbert Du Motier, marquis de Lafayette, papers.
- Marie Joseph Paul Yves Roch Gilbert Du Motier, marquis de Lafayette, papers, 1776-1934.
- Markoe family. Galloway-Maxcy-Markoe families papers, 1654-1888.
- Markoe, Francis, 1801-1871. Francis Markoe papers.
- Marquis de Lafayette papers, 1757-1990.
- Marshall family. Humphrey Marshall papers, 1771-2002.
- Marshall, Humphrey, 1812-1872. Humphrey Marshall papers, 1771-2002.
- Marshall, John, 1755-1835. Albert J. Beveridge collection of John Marshall papers. 1776-1844.
- Martin Van Buren papers, 1787-1910.
- Mary Ann Bickerdyke papers, 1847-1905.
- Maryland Insurance Company. Maryland Insurance Company records.
- Massachusetts Colonization Society. Massachusetts Colonization Society letterbooks. 1856-1875.
- Matthew Fontaine Maury papers, 1825-1960.
- Matthew Simpson papers, 1829-1927.
- Maury, Matthew Fontaine, 1806-1873. Matthew Fontaine Maury papers, 1825-1960.
- Maxcy family. Galloway-Maxcy-Markoe families papers, 1654-1888.
- Maxcy, Virgil, 1785-1844. Virgil Maxcy papers.
- Maynard, Edward, 1813-1891. Edward Maynard papers, 1836-1867.
- McAdoo family. Floyd-McAdoo families papers, 1806-1894.
- McAdoo, Mary Faith Floyd, 1832-1913. Mary Faith Floyd McAdoo diaries. 1870-1891.
- McAdoo, W. G. (William Gibbs), 1820-1894. W.G. McAdoo diaries. 1846-1894.
- McAlpine, William J. (William Jarvis). William J. McAlpine letterbooks, 1837-1861.
- McArthur, Duncan, 1772-1839. Duncan McArthur papers, 1783-1848.
- McBride, James, 1784-1817. James McBride papers. 1808-1817.
- McClellan, George B. (George Brinton), 1865-1940. George B. McClellan papers, 1838-1922.
- McCurdy, Robert Henry, 1800-1880. Robert Henry McCurdy papers.
- McHenry, James, 1753-1816. James McHenry papers, 1775-1862.
- McKim, Alexander, 1748-1832. Alexander McKim papers.
- McLain, William. William McLain papers. 1831-1850.
- McLane, Louis, 1786-1857. Louis McLane correspondence, 1795-1894.
- McLean, Andrew (Merchant) Andrew McLean mercantile letterbook. 1774-1780.
- McLean, John, 1785-1861. John McLean papers. 1813-1829.
- McLean, John, 1785-1861. John McLean papers, 1816-1866.
- McManus-Young clipping collection of materials on magic, 1870-1955.
- Medill, William, 1802-1865. William Medill papers, 1834-1864.
- Meigs, Montgomery, 1847-1931. Montgomery Meigs papers.
- Meigs, Montgomery C. (Montgomery Cunningham), 1816-1892. Montgomery C. Meigs papers, 1799-1971.
- Meigs, Return Jonathan, 1740-1823. Return Jonathan Meigs papers.
- Meigs, Return Jonathan, 1764-1825. Return Jonathan Meigs papers.
- Melville Weston Fuller papers, 1794-1949.
- Mercy-Argenteau family papers, 1410-1921.
- Mercy family. Mercy-Argenteau family papers, 1410-1921.
- Mercy family papers.
- Meredith, Jonathan D., 1783-1872. Jonathan D. Meredith papers, 1795-1859.
- Merrill, George P. (George Perkins), 1854-1929. George P. Merrill correspondence and autographs, 1803-1926.
- Millard Fillmore papers, 1839-1925.
- Mills family. Low-Mills family papers, 1767-1971.
- Mills family papers.
- Mills, Robert, 1781-1855. Robert Mills papers, 1804-1862.
- Minto, Gilbert Elliot, Earl of, 1751-1814. Minto map collection, 1769-1811.
- Minto map collection, 1769-1811.
- Mitchell collection of American book illustrations and portrait prints.
- Mitchell, James T. (James Tyndale), 1834-1915. Study collection of 18th and 19th-century American book illustrations and portrait prints.
- 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.
- Monroe, James, 1758-1831. James Monroe papers, 1758-1839.
- Montgomery C. Meigs papers, 1799-1971.
- Moore, John Bassett, 1860-1947. John Bassett Moore file. 1732-1914.
- Mordecai, Alfred, 1804-1887. Alfred Mordecai papers, 1790-1948.
- Moreton Frewen papers, 1823-1934.
- Morfit, Henry Mason, 1793-1865. Henry Mason Morfit papers, 1819-1858.
- Morgan, David Banister, 1773-1848. David Banister Morgan papers, 1804-1819.
- Morgan, James Dudley, 1862-1919. James Dudley Morgan collection of Digges-L'Enfant-Morgan papers, 1674-1923.
- Morgan, William Ferguson. William Ferguson Morgan autograph collection. 1746-1938.
- Morris and Popham families papers, 1669-1892.
- Morris, Anne Cary Randolph, 1774-1837. Anne Cary Randolph Morris papers.
- Morris family. Morris and Popham families papers, 1669-1892.
- Morris family papers.
- Morris, George Pope, 1802-1864. George Pope Morris papers, 1832-1862.
- Morris, Gouverneur, 1752-1816. Gouverneur Morris papers, 1771-1834.
- Morris, Lewis, 1671-1746. Lewis Morris papers.
- Morris, Lewis, 1698-1762. Lewis Morris papers.
- Morris, Richard, 1730-1810. Richard Morris papers.
- Morris, Robert Hunter, approximately 1700-1764. Robert Hunter Morris papers.
- Morrison, James, 1755-1823. James Morrison papers.
- Morse, Samuel Finley Breese, 1791-1872. Samuel Finley Breese Morse papers, 1793-1944.
- Muriel H. Parry map collection.
- Murray, William Vans, 1760-1803. William Vans Murray papers, 1778-1805.
- Myer, Albert James, 1829-1880. Albert James Myer papers, 1816-1880.
- Myers, Leonard. Leonard Myers papers.
N
- N. King papers.
- Nathaniel Wright family papers, 1787-1917.
- New England Historic Genealogical Society. New England Historic Genealogical Society records. 1849-1852.
- Newland, William Augustine, 1813-1901. William A. Newland and Charles Zeuner collection of music, circa 1735-circa 1900.
- Newland / Zeuner collection, circa 1735-circa 1900.
- Nicholas Biddle papers, 1681-1933.
- Nicholas King family papers, 1792-1987.
- Nicholas Low papers, 1773-1897.
- Nicholas Philip Trist papers, 1795-1873.
- Nicholson family papers.
- Nicholson, John, 1757-1800. John Nicholson family papers, 1786-1868.
- Nicholson, Joseph Hopper, 1770-1817. Joseph Hopper Nicholson papers.
- Nicholson, Joseph Hopper, 1770-1817. Joseph Hopper Nicholson papers, 1789-1827.
- Nicholson, Joseph, Jr., -1786. Joseph Nicholson Jr. papers.
- Nicholson, Rebecca Lloyd, 1771-1847. Rebecca Lloyd Nicholson papers.
- Nicollet, J. N. (Joseph Nicolas), 1786-1843. J.N. Nicollet papers.
- Nicollet, J. N. (Joseph Nicolas), 1786-1843. J.N. Nicollet papers, 1797-1843.
- Ninian Pinkney papers, 1822-1913.
- Norman Hapgood and Elizabeth Reynolds Hapgood papers, 1824-1977.
- North, Gary W. Gary W. North map collection.
- Nuccio, Mark. To the Man of War Bird. 1983.
O
- O'Callaghan, E. B. (Edmund Bailey), 1797-1880. E.B. O'Callaghan papers, 1830-1879.
- O'Connor, William Douglas, 1832-1889. William Douglas O'Connor papers.
- O'Neil, Charles, 1842-1927. Charles O'Neil papers, 1833-1927.
- O'Reilly, Alejandro, 1725-1794. Alejandro O'Reilly manuscript volume.
- Oliver Ellsworth family papers, 1762-1907.
- Oliver Wendell Holmes papers, 1837-1931.
- Olmsted, Frederick Law, 1822-1903. Frederick Law Olmsted papers, 1777-1952.
- Olmsted, Gideon, 1749-1845. Gideon Olmsted papers.
- Olmsted, John, 1791-1873. John Olmsted papers.
- Ontario (Sloop of war). USS Ontario and USS Dolphin journals and logbooks, 1817-1821.
- Osgood family. Field-Osgood family papers, 1702-1938.
- Osgood family papers.
- Osgood, Joseph B. F. (Joseph Barlow Felt), 1823- Joseph B. F. Osgood papers. 1817-1892.
- Osgood, Maria Bowne Franklin. Maria Bowne Franklin Osgood papers.
- Osgood, Samuel, 1748-1813. Samuel Osgood papers.
P
- P. Phillips family papers, 1832-1914.
- Paganini, Nicolò, 1782-1840. Gertrude Clarke Whittall Foundation collection on Nicolò Paganini, 1810-1967.
- Palfrey family. Lee-Palfrey families papers, 1780-1932.
- Palmer, Alexander Smith, 1806-1894. Alexander Smith Palmer papers.
- Palmer family. Palmer-Loper family papers, 1667-1994.
- Palmer-Loper family papers, 1667-1994.
- Palmer, Nathaniel Brown, 1799-1877. Nathaniel Brown Palmer papers.
- Parker, Amasa J. (Amasa Junius), 1807-1890. Amasa J. Parker papers, 1836-1875.
- Parry, Muriel H., 1922-2004. Muriel H. Parry map collection.
- Parsons, Enoch, 1769-1846. Enoch Parsons papers.
- Parsons family papers, 1769-1878.
- Parsons family. Parsons family papers, 1769-1878.
- Parsons, Samuel Holden, 1737-1789. Samuel Holden Parsons papers.
- Parsons, Samuel Holden, 1800-1871. Samuel Holden Parsons papers.
- Partridge, Alden, 1785-1854. Alden Partridge papers, 1807-1959.
- Patent medicine labels and advertisements (Library of Congress).
- Paterson, William, 1745-1806. William Paterson papers, 1760-1806.
- Patterson, C. P. (Carlile Pollock), 1816-1881. C.P. Patterson papers.
- Patterson, Daniel Todd, 1786-1839. Daniel Todd Patterson papers, 1772-1927.
- Patterson, Eliza Pearson, 1826-1902. Eliza Pearson Patterson papers.
- Patterson family. Patterson-Winslow family papers, 1813-1963.
- Patterson-Winslow family papers, 1813-1963.
- Paul Löwenberg collection of Lanner-Strauss materials, 1825-1916.
- Paul Löwenberg collection of music by the Johann Strauss and Joseph Lanner families, 1825-1929.
- Peckham family. Wheeler H. Peckham family papers, 1838-1894.
- Peckham, Rufus W., 1809-1873. Rufus W. Peckham papers.
- Peckham, Rufus Wheeler, 1838-1909. Rufus Wheeler Peckham papers.
- Peckham, Wheeler H. (Wheeler Hazard), 1833-1905. Wheeler H. Peckham family papers, 1815-1910.
- Pelham, Thomas, active 18th century. Thomas Pelham account books. 1705-1716.
- Périer, Natalie du Motier de La Fayette, 1803-1878. Natalie du Motier de La Fayette Périer 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.
- Peter Chardon Brooks Insurance Agency. Peter Chardon Brooks Insurance Agency records.
- Peter Force collection.
- Peter Force papers.
- Peter Force papers and collection, 1492-1977.
- Philipp Franz von Siebold papers, 1609-1927.
- Phillipps, Thomas, Sir, 1792-1872. Sir Thomas Phillipps collection, circa 1400-1857.
- Phillips, Eugenia Levy. Eugenia Levy Phillips journal. 1861-1862.
- Phillips, P. (Philip), 1807-1884. P. Phillips family papers, 1832-1914.
- Phillips, W. Hallett (William Hallet), 1853-1897. W. Hallett Phillips papers.
- Phineas P. Quimby papers, 1841-1887.
- Phineas Parkhurst Quimby papers.
- Physick, Edmund, 1725 or 1726-1804. Edmund Physick family papers, 1759-1899.
- Physick family. Edmund Physick family papers, 1759-1899.
- 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, John T. (John Thomas), 1822-1884. John T. Pickett papers.
- Pickett, La Salle Corbell, 1848-1931. La Salle Corbell Pickett papers.
- Pickett, Theodore John. Theodore John Pickett papers.
- Pierce-Aiken family papers, 1797-1903.
- Pierce family. Pierce-Aiken family papers, 1797-1903.
- Pierce, Franklin, 1804-1869. Franklin Pierce papers, 1820-1869.
- Pierrepont, Edwards, 1817-1892. Edwards Pierrepont papers, 1847-1900.
- Pierson family. Job Pierson family papers, 1755-1908.
- Pierson, Job, 1791-1860. Job Pierson family papers, 1755-1908.
- Pierson, Job, 1824-1896. Job Pierson papers.
- Pike, Luther H. Luther H. Pike papers.
- Pike, Zebulon Montgomery, 1779-1813. Zebulon Montgomery Pike diary excerpt. undated.
- Pinchot, Gifford, 1865-1946. Gifford Pinchot map collection.
- Pinchot, Gifford, 1865-1946. Gifford Pinchot papers.
- Pinkerton, Charles, 1871-1974. Charles Pinkerton collection of Arthur and Herndon family papers, 1822-1938.
- Pinkney, Ninian, 1811-1877. Ninian Pinkney papers, 1822-1913.
- Pintado, Vicente Sebastián, 1774-1829. Vicente Sebastián Pintado papers, 1781-1842.
- Plumer, William, 1759-1850. William Plumer papers, 1774-1845.
- Polk family papers, 1767-1859.
- Polk family. Polk family papers, 1767-1859.
- Polk, James K. (James Knox), 1795-1849. James K. Polk papers, 1775-1891.
- Polk, Sarah Childress, 1803-1891. Sarah Childress Polk papers.
- Popham family. Morris and Popham families papers, 1669-1892.
- Popham family papers.
- Popham, William, 1752-1847. William Popham papers.
- Porter, David, 1780-1843. David Porter papers.
- Porter, David, 1780-1843. David Porter papers. 1811-1841.
- Porter, David D. (David Dixon), 1813-1891. David D. Porter family papers, 1799-1899.
- Porter, David D. (David Dixon), 1813-1891. David D. Porter papers. 1861-1881.
- Porter family. David D. Porter family papers, 1799-1899.
- Porter family papers, 1811-1881.
- Porter family. Porter family papers, 1811-1881.
- Preble, Edward, 1761-1807. Edward Preble papers, 1680-1912.
- 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.
- Prince, Christopher, 1751-1832. Christopher Prince autobiography and souvenir booklet, 1806-1891.
- Public Archives of Canada. British ministers' correspondence in the Public Archives of Canada, 1791-1875.
- Puerto Rican collection, 1591-1900.
- Puerto Rican memorial collection, 1519-1923.
- Puerto Rico. Puerto Rican collection, 1591-1900.
Q
R
- Raffles, Thomas Stamford, Sir, 1781-1826. Minto map collection, 1769-1811.
- Ralph Izard family papers, 1778-1826.
- Ralph Randolph Gurley papers, 1825-1931.
- Randolph, Elizabeth, active 1793. Elizabeth Randolph papers.
- Randolph, John, 1773-1833. John Randolph correspondence and diaries, 1803-1834.
- Randolph, Peter S. Peter S. Randolph papers.
- Randolph, William B., 1793-1874. William B. Randolph papers, 1696-1884.
- 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.
- Redington, George, 1798-1850. George Redington papers, 1804-1907.
- Redington, James, 1810-1891. James Redington papers.
- Reid family. Samuel Chester Reid family papers, 1807-1963.
- Reid, Samuel C. (Samuel Chester), 1818-1897. Samuel C. Reid papers.
- Reid, Samuel Chester, 1783-1861. Samuel Chester Reid family papers, 1807-1963.
- Research materials on music in Boston, 1798-1830.
- Reverdy Johnson papers, 1830-1876.
- Richard Dale papers, 1778-1918.
- Richard H. Bayard papers.
- Richard Henry Wilde papers, 1807-1867.
- Richard Lathers papers, 1826-1901.
- Richard M. Look map collection.
- Richard Rush papers, 1805-1852.
- Richards, Mark, 1760-1844. Mark Richards papers.
- Richardson, Daniel, 1670-1722. Daniel Richardson papers.
- Richardson, Ernest Cushing, 1860-1939. Ernest Cushing Richardson collection of French and Italian manuscripts, 1179-1825.
- Richardson, Ruth, 1677-1728. Ruth Richardson papers.
- Richardson, William Merchant, 1774-1838. William Merchant Richardson papers.
- Ridgely, Charles Goodwin, 1784-1848. Charles Goodwin Ridgely papers, 1813-1826.
- 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.
- Rives, William C. (William Cabell), 1793-1868. William C. Rives papers, 1674-1939.
- Robards, Lewis C. Lewis C. Robards receipt book. 1851-1853.
- Robert Anderson papers, 1819-1948.
- Robert Carter papers, 1685-1828.
- Robert Garrett family papers, 1778-1925.
- Robert Garrett family. Robert Garrett family papers, 1778-1925.
- Robert Mills papers, 1804-1862.
- Robert R. Hitt papers, 1830-1906.
- Roberts, Edmund, 1784-1836. Edmund Roberts papers, 1803-1905.
- 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.
- 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, 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.
- Rodney, C. A. (Caesar Augustus), 1772-1824. C.A. Rodney papers.
- Rodney, Caesar, 1728-1784. Caesar Rodney papers.
- Rodney family papers, 1771-1824.
- Rodney family. Rodney family papers, 1771-1824.
- Rodney, Thomas, 1744-1811. Thomas Rodney papers.
- Rodolfo R. Schuller papers, 1492-1915.
- Roe, Francis Asbury, 1823-1901. Francis Asbury Roe papers, 1842-1901.
- Roger Jones family papers, 1649-1896.
- Roger Sherman papers, 1746-1827.
- Rossiĭsko-amerikanskai︠a︡ kompanii︠a︡. Yudin collection of Russian-American Company records. 1783-1946.
- Rowan, Stephen C. (Stephen Clegg), 1808-1890. Stephen C. Rowan papers, 1826-1890.
- R.R. Bowker papers, 1831-1931.
- Rush, Madison, active 1845-1847. Madison Rush journal. 1845-1847.
- Rush, Richard, 1780-1859. Richard Rush papers, 1805-1852.
- Russell & Co., Guangzhou, China, records, 1812-1894.
- Russell & Co. Russell & Co., Guangzhou, China, records, 1812-1894.
- Russell, Samuel, 1789-approximately 1862. Samuel Russell papers.
- 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.
- Ruthven Deane bookplate collection.
S
- Salmon P. Chase papers, 1755-1898.
- Salter, William D., 1795-1869. William D. Salter papers, 1810-1869.
- Saltoun, Alexander George Fraser, Lord, 1785-1853. Lord Saltoun collection of guitar music, 1810-1850.
- Sampson, William, 1764-1836. William Sampson papers, 1806-1849.
- Samuel Adams papers, 1635-1826.
- Samuel Chester Reid family papers, 1807-1963.
- Samuel Finley Breese Morse papers, 1793-1944.
- Samuel Hodges, Jr., journal and correspondence, 1822-1827.
- Samuel Hodges, Jr., papers.
- Samuel Holten papers, 1630-1843.
- Samuel Hooper papers, 1829-1874.
- Samuel J. Baird papers, 1834-1892.
- Samuel John Baird papers.
- Samuel Smith family papers, 1772-1911.
- San José de Queréndaro Hacienda records, 1543-1922.
- Sanders, Anna Johnson Reid, approximately 1815-1890. Anna Johnson Reid Sanders correspondence and journals.
- Sanders family. George Nicholas Sanders family papers, 1833-1973.
- Sanders, George N. (George Nicholas), 1848-1890. George N. Sanders journal.
- Sanders, George Nicholas, 1812-1873. George Nicholas Sanders family papers, 1833-1973.
- Sarah Stone autograph collection, 1720-1962.
- Saunders, John Loyall, 1802-1860. John Loyall Saunders papers, 1844-1857.
- Scala, Francis Maria, 1819?-1903. Francis Maria Scala papers, 1816-2013.
- Schoener family. Jacob B. Schoener family papers, 1752-2009.
- Schoener family papers.
- Schöner, Johann, 1477-1547. Schöner Sammelband. 1516?.
- Schoolcraft, Henry Rowe, 1793-1864. Henry Rowe Schoolcraft papers, 1788-1941.
- Schoolcraft, Henry Rowe, Mrs. Mrs. Henry Rowe Schoolcraft papers.
- Schoolcraft, Jane Johnston, 1800-1842. Jane Johnston Schoolcraft papers.
- Schoolcraft, Lawrence, 1757-1840. Lawrence Schoolcraft papers.
- Schuller, Rodolfo R., 1873-1932. Rodolfo R. Schuller papers, 1492-1915.
- Schuyler Colfax correspondence and speeches, 1837-1882.
- Schuyler Colfax papers.
- Scott, Hugh Lenox, 1853-1934. Hugh Lenox Scott papers, 1582-1981.
- Scott, William McKendree, 1817-1861. William McKendree Scott journal. 1845.
- Scrap books compiled by Thompson and Chesson.
- Scrapbooks compiled by Thompson and Chesson.
- Selfridge, Thomas Oliver, 1804-1902. Thomas Oliver Selfridge papers, 1809-1927.
- Sever, James, -1845. James Sever papers, 1764-1959.
- Sewall, Frederick Dummer, 1826-1907. Frederick Dummer Sewall papers. 1862-1907.
- Sewall, Joseph, 1795-1851. Joseph Sewall papers, 1832-1907.
- Shaker collection of records concerning the United Society of Believers in Christ's Second Appearing, 1676-1937.
- Shaw family papers, 1636-1892.
- Shaw family. Shaw family papers, 1636-1892.
- Shaw, John, 1773-1823. John Shaw papers, 1798-1895.
- Sheet music cover collection (Library of Congress).
- Shelby, Evan, 1719-1794. Evan Shelby papers.
- Shelby family papers, 1738-1916.
- Shelby family. Shelby family papers, 1738-1916.
- Shelby, Isaac, 1750-1826. Isaac Shelby papers.
- Shepherd, William R. (William Robert), 1871-1934. William R. Shepherd papers, 1554-1931.
- Sherman, Ellen Ewing, 1824-1888. Ellen Ewing Sherman papers.
- Sherman, Roger, 1721-1793. Roger Sherman papers, 1746-1827.
- Sherman, William T. (William Tecumseh), 1820-1891. William T. Sherman papers.
- Sherman, William T. (William Tecumseh), 1820-1891. William T. Sherman papers, 1810-1897.
- 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.
- Short, Charles Wilkins, 1794-1863. Charles Wilkins Short papers.
- Short family papers.
- Short family. Short-Harrison-Symmes families papers, 1760-1878.
- Short-Harrison-Symmes families papers, 1760-1878.
- Short, John Cleves, 1792-1864. John Cleves Short papers.
- Short, Peyton, 1761-1825. Peyton Short papers.
- Short, William, 1759-1849. William Short papers.
- Short, William, 1759-1849. William Short papers, 1778-1853.
- Sickles, Daniel Edgar, 1819-1914. Daniel Edgar Sickles papers, 1821-1918.
- Siebold, Philipp Franz von, 1796-1866. Philipp Franz von Siebold papers, 1609-1927.
- Simmons, James Fowler, 1795-1864. James Fowler Simmons map collection. (2)
- Simmons, James Fowler, 1795-1864. James Fowler Simmons papers.
- Simmons, James Fowler, 1795-1864. James Fowler Simmons papers, 1771-1939.
- Simpson, Matthew, 1811-1884. Matthew Simpson papers, 1829-1927.
- Singleton family papers, 1758-1860.
- Singleton family. Singleton family papers, 1758-1860.
- Sioussat, St. George L. (St. George Leakin), 1878-1960. St. George L. Sioussat papers, 1831-1959.
- Sir Augustus John Foster papers, 1794-1844.
- Sir George Cockburn papers, 1788-1847.
- Sir Thomas Phillipps collection, circa 1400-1857.
- Skipwith, Fulwar, 1765-1839. Fulwar Skipwith papers.
- Smith, C. Alphonso (Charles Alphonso), 1864-1924. C. Alphonso Smith papers. 1864-1927.
- Smith, Caleb B. (Caleb Blood), 1808-1864. Caleb B. Smith papers, 1841-1862.
- Smith, Ebenezer, active 1797-1840. Ebenezer Smith account books. 1797-1840.
- Smith family. Samuel Smith family papers, 1772-1911.
- Smith, Francis O. J. (Francis Ormond Jonathan), 1806-1876. Francis O.J. Smith digest of congressional reports, 1844.
- Smith, John Spear, -1866. John Spear Smith papers. 1804-1867.
- Smith, Logan Pearsall, 1865-1946. Logan Pearsall Smith papers, 1760-1946.
- Smith, Margaret Bayard, 1778-1844. Margaret Bayard Smith papers, 1789-1874.
- Smith, Robert, 1757-1842. Robert Smith papers. 1796-1830.
- Smith, Samuel, 1752-1839. Samuel Smith family papers, 1772-1911.
- Society for the Preservation of the American Musical Heritage collection, 1792-1969.
- Society of the Cincinnati. Branche française. Society of the Cincinnati. Branche française records. 1783-1926.
- Society of the Cincinnati records, 1714-1938.
- Society of the Cincinnati. Society of the Cincinnati records, 1714-1938.
- Sons of Temperance of North America. Waddington Division, No. 299 (Waddington, N.Y.) Sons of Temperance of North America. Waddington Division, No. 299 (Waddington, N.Y.) records.
- Spanish-American affairs collection, 1810-1816.
- Spanish colonial government, Mariana Islands records, 1678-1899.
- Spinner, Francis Elias, 1802-1890. Herman K. Crofoot collection of Francis Elias Spinner papers, 1792-1908.
- Spinner, John Peter, 1768-1848. John Peter Spinner diary. circa 1839.
- Squier, E. G. (Ephraim George), 1821-1888. E.G. Squier papers, 1809-1888.
- St. George L. Sioussat papers, 1831-1959.
- Stanton, Elizabeth Cady, 1815-1902. Elizabeth Cady Stanton papers, 1814-1946.
- Stauffer Collection.
- Stephen Bleecker Luce papers, 1799-1955.
- Stephen C. Rowan papers, 1826-1890.
- Stephen Collins and Son (Philadelphia, Pa.) records, 1749-1857.
- Stephen Collins and Son (Philadelphia, Pa.). Stephen Collins and Son (Philadelphia, Pa.) records, 1749-1857.
- Stephenson, John Aldrich. John Aldrich Stephenson collection of the Hand, Fiske, and Aldrich families papers. 1745-1966.
- Stevens, Samuel, 1778-1860. Samuel Stevens papers.
- Stevenson, Andrew, 1784-1857. Andrew Stevenson and J.W. Stevenson papers. 1756-1882.
- Stevenson, J. W. (John White), 1812-1886. Andrew Stevenson and J.W. Stevenson papers. 1756-1882.
- Stewart, David, 1800-1858. David Stewart papers.
- Stewart, John, -1820. John Stewart papers.
- Stiles family papers.
- Stiles family. Stiles, Horr, and Bonney families papers, 1803-1907.
- Stiles, Horr, and Bonney families papers, 1803-1907.
- Stokes, E. H. (Ellwood Haines), 1815-1897. E.H. Stokes papers. 1846-1865.
- Stone, Lucy, 1818-1893. Lucy Stone papers.
- Stone, Sarah, active 1840. Sarah Stone autograph collection, 1720-1962.
- Story, Joseph, 1779-1845. Joseph Story correspondence, 1807-1843.
- Study collection of 18th and 19th-century American book illustrations and portrait prints.
- Sumner, Charles, 1811-1874. Charles Sumner correspondence, 1841-1874.
- Susan B. Anthony papers, 1846-1934.
- Susan Brownell Anthony papers.
- Swan, Robert, active approximately 1828. Robert Swan sale catalog of books. circa 1828.
- Swisher, Carl Brent, 1897-1968. Carl Brent Swisher collection of research material relating to Roger Brooke Taney, 1836-1962.
- Sylvanus Bourne papers, 1775-1859.
- Symmes family papers.
- Symmes family. Short-Harrison-Symmes families papers, 1760-1878.
- Symmes, John Cleves, 1742-1814. John Cleves Symmes papers.
T
- T. De Witt Talmage papers, 1831-1902.
- Taggart, Hugh T. (Hugh Thomas), 1844-1914. Hugh T. Taggart collection relating to the District of Columbia and Maryland, 1751-1889.
- 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.
- Tappan, Benjamin, 1773-1857. Benjamin Tappan papers, 1795-1900.
- Tappan, Lewis, 1788-1873. Lewis Tappan papers, 1809-1903.
- Tappan, William, 1863-1948. William Tappan autograph collection, 1640-1939.
- Tasker Howard Bliss collection of World War I maps and related materials.
- Taylor, Anna Tuthill Harrison, 1813-1865. Anna Tuthill Harrison Taylor papers.
- Taylor, Charles, -1837. Charles Taylor papers.
- Taylor family. Lovering-Taylor family papers, 1727-1926.
- Taylor, Hannah Jones Welles, 1776-1845. Hannah Jones Welles Taylor papers.
- Taylor, Joseph, 1745?-1816. Joseph Taylor papers.
- Taylor, William, 1714-1789. William Taylor papers.
- Taylor, William (Merchant of Baltimore, Md.). William Taylor papers, 1775-1859.
- Taylor, Zachary, 1784-1850. Zachary Taylor papers, 1814-1931.
- T.H. Gallaudet and Edward Miner Gallaudet papers, 1806-1958.
- T.H. Gallaudet papers.
- Thacher, John Boyd, 1847-1909. Autographs of European notables. 1422-1879.
- Thayer, William Sydney, 1830-1864. William Sydney Thayer papers, 1835-1901.
- Thomas A. Jenckes papers, 1836-1878.
- Thomas Davenport correspondence, 1836-1837.
- Thomas Davenport papers.
- Thomas Ewing family papers, 1757-1941.
- Thomas H. Hubbard papers, 1817-1823.
- Thomas Hill Hubbard papers.
- Thomas Jefferson papers, 1606-1943.
- Thomas Oliver Selfridge papers, 1809-1927.
- Thomas Sidney Jesup papers, 1780-1907.
- Thomas Truxtun papers, 1796-1885.
- Thomas Truxtun papers (Naval Historical Foundation collection).
- Thompson-Chesson scrapbooks.
- Thompson, Waddy, 1798-1868. Waddy Thompson papers, 1826-1882.
- Thomson, Charles, 1729-1824. Charles Thomson papers, 1765-1888.
- Thornton, Anna Maria Brodeau, 1775?-1865. Anna Maria Brodeau Thornton papers.
- Thornton, Anna Maria Brodeau, 1775?-1865. Anna Maria Brodeau Thornton papers, 1793-1861.
- Thornton, William, 1759-1828. William Thornton papers, 1741-1865.
- Tilton, Donald (Historian). Research materials on music in Boston, 1798-1830.
- 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.
- Titus Coan family papers, 1818-1923.
- Tobias Lear papers, 1790-1816.
- Toner, Joseph M. (Joseph Meredith), 1825-1896. Joseph Meredith Toner collection of manuscripts, 1741-1896.
- Transylvania University. Transylvania University records.
- Traubel, Anne Montgomerie, 1864-1954. Anne Montgomerie Traubel papers.
- Traubel, Horace, 1858-1919. Horace Traubel papers.
- Trist, Nicholas Philip, 1800-1874. Nicholas Philip Trist papers, 1795-1873.
- Truxtun, Thomas, 1755-1822. Thomas Truxton papers.
- Truxtun, Thomas, 1755-1822. Thomas Truxtun papers, 1796-1885.
- Tryon family. Horsford-Tryon families papers, 1800-2000.
- Tryon family papers.
- Tuck, Amos, 1810-1879. Amos Tuck papers.
- Turner, Ann Arnold Key, 1811-1884. Ann Arnold Key Turner correspondence.
- Turner, Daniel, 1796-1860. Daniel Turner correspondence.
- Turner family. Key-Cutts-Turner family papers, 1808-1975.
- Turner, Justin G. Justin G. Turner autograph collection, 1763-1968.
- 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
- Ulysses S. Grant papers, 1819-1974.
- United States. Board of Treasury. United States. Board of Treasury records.
- United States. Coast Guard. Historian's Office. U.S. Coast Guard. Historian's Office collection, 1746-1951.
- United States. Comptroller of the Treasury. United States. Comptroller of the Treasury records.
- United States Constitution collection, 1773-1944.
- United States. Department of State. Spanish-American affairs collection, 1810-1816.
- United States. Department of the Treasury. First Auditor's Office. United States. Department of the Treasury. First Auditor's Office records.
- United States. Department of the Treasury. Office of the Fifth Auditor. United States. Department of the Treasury. Office of the Fifth Auditor records.
- United States. Department of the Treasury. Office of the Third Auditor. United States. Department of the Treasury. Office of the Third Auditor records.
- United States Department of the Treasury records, 1775-1890.
- United States. Department of the Treasury. United States Department of the Treasury records, 1775-1890.
- United States. Division of Customs. United States. Division of Customs records.
- United States finance collection, 1761-1908.
- United States Naval Observatory records, 1830-1900.
- United States Naval Observatory. United States Naval Observatory records, 1830-1900.
- United States. Office of Commissary General of Prisoners. United States. Office of Commissary General of Prisoners records.
- United States. War Department records, 1794-1848.
- United States. War Department. United States. War Department records, 1794-1848.
- U.S. Coast Guard. Historian's Office collection, 1746-1951.
- USS Dolphin journals and logbooks.
- USS Ontario and USS Dolphin journals and logbooks, 1817-1821.
- USS Ontario and USS Dolphin records.
- USS Ontario journals and logbook.
V
- Van Buren, Angelica Singleton, 1816-1877. Angelica Singleton Van Buren papers.
- Van Buren family papers.
- Van Buren, John, 1810-1866. John Van Buren correspondence and a travel journal. 1838-1839.
- Van Buren, Lawrence, 1786-1868. Lawrence Van Buren family papers, 1721-1938.
- Van Buren, Martin, 1782-1862. Martin Van Buren papers, 1787-1910.
- 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.
- Vicente Sebastián Pintado papers, 1781-1842.
- Victor S. Clark papers, 1827-1944.
- Visual materials from the Blackwell family papers.
- Visual materials from the Daniel Carter Beard papers.
- 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.
W
- W. B. Bryan papers.
- Waddy Thompson papers, 1826-1882.
- Wade, Nicholas King, 1823-1899. Nicholas King Wade papers. 1856.
- Wade, William, 1789-1875. William Wade papers. 1840-1861.
- 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.
- Waldemar Westergaard collection, 1558-1806.
- Walden, Ebenezer, 1777-1857. Ebenezer Walden papers. 1816-1844.
- Walker, Francis, 1764-1806. Francis Walker papers.
- Walker, Thomas, 1715-1794. Thomas Walker papers.
- Walt Whitman papers, 1837-1957.
- Walt Whitman papers in the Charles E. Feinberg collection, 1763-1985.
- Ward family papers, 1831-1904.
- Ward family. Ward family papers, 1831-1904.
- Ward, James Thomas, 1820-1897. James Thomas Ward papers, 1838-1897.
- Ward, William Norvell, 1817-1881. William Norvell Ward papers.
- Warden, David Bailie, 1772-1845. David Bailie Warden papers.
- Warden, David Bailie, 1772-1845. David Bailie Warden papers, 1800-1840.
- Washburn, Edward W. (Edward Wight), 1881-1934. Edward W. Washburn family papers, 1817-1934.
- Washington family collection, 1582-1965.
- Washington family papers.
- Washington family. Washington family collection, 1582-1965.
- Washington, George, 1732-1799. George Washington papers. 1688-1896.
- Washington National Monument Society. Washington National Monument Society records. 1838-1842.
- Wason, Lyman P. Lyman P. Wason journal. 1849-1852.
- Watterston, George, 1783-1854. George Watterston papers, 1809-1866.
- W.B. Bryan notes and newspaper extracts, 1789-1888.
- Webster, Daniel, 1782-1852. Daniel Webster papers, 1800-1900.
- Weeks, Stephen B. (Stephen Beauregard), 1865-1918. Stephen B. Weeks papers.
- Weik, Jesse William, 1857-1930. Jesse William Weik papers. 1830-1927.
- Welles, Edgar Thaddeus, 1843-1914. Diary of Gideon Welles, secretary of the navy under Lincoln and Johnson. 1911.
- Welles, Gideon, 1802-1878. Gideon Welles papers, 1777-1911.
- Welles, Gideon, 1802-1878. Lincoln and Seward; remarks upon the memorial address of Chas. Francis Adams, on the late Wm. H. Seward, with incidents and comments illustrative of the measures and policy of the administration of Abraham Lincoln, and views as to the relative positions of the late President and Secretary of State. 1874.
- West Florida collection, 1764-1848.
- West Florida records.
- West Florida. West Florida records.
- Westergaard, Waldemar, 1882-1963. Waldemar Westergaard collection, 1558-1806.
- Wheeler H. Peckham family papers, 1815-1910.
- Wheeler Hazard Peckham papers.
- Whitall, Ann Cooper, 1716-1797. Ann Cooper Whitall diary. 1760-1762.
- White, Walter C., -1837. James Knight and Walter C. White papers. 1825-1867.
- Whiting family. William Henry Whiting family papers, 1731-1952.
- Whiting Griswold correspondence, 1843-1874.
- Whiting Griswold papers.
- Whiting, William Henry, 1843-1925. William Henry Whiting family papers, 1731-1952.
- Whitman, Walt, 1819-1892. Walt Whitman notes. 1850.
- Whitman, Walt, 1819-1892. Walt Whitman papers, 1837-1957.
- Whitman, Walt, 1819-1892. Walt Whitman papers in the Charles E. Feinberg collection. 1806-1981.
- Whitney & Burnham (New Orleans, La.) records, 1835-1851.
- Whitney & Burnham (New Orleans, La.). Whitney & Burnham (New Orleans, La.) records, 1835-1851.
- Wilcox, Cadmus M. (Cadmus Marcellus), 1824-1890. Cadmus M. Wilcox papers, 1846-1887.
- Wilde, Richard Henry, 1789-1847. Richard Henry Wilde papers, 1807-1867.
- Wilhelmus Bogart Bryan papers.
- Wilkes, Charles, 1798-1877. Charles Wilkes papers, 1607-1959.
- Willard, Henry A. (Henry Augustus), 1902-2002. Henry A. Willard II collection, 1743-1888.
- William A. Newland and Charles Zeuner collection of music, circa 1735-circa 1900.
- William Allen papers, 1796-1879.
- William B. Bradbury collection, 1846-1928.
- William B. Randolph papers, 1696-1884.
- William Bebb papers, 1705-1849.
- William C. Rives papers, 1674-1939.
- William D. Salter papers, 1810-1869.
- William Eustis papers, 1757-1908.
- William Farquhar correspondence and other Malay letters, 1812-1832.
- William Goodell papers, 1818-1917.
- William H. Littlewood map collection.
- William Henry Harrison papers, 1734-1939.
- William Henry Whiting family papers, 1731-1952.
- William J. McAlpine letterbooks, 1837-1861.
- William J. McAlpine papers.
- William L. Marcy papers, 1806-1930.
- William Medill papers, 1834-1864.
- William Paterson papers, 1760-1806.
- William Plumer papers, 1774-1845.
- William R. Shepherd papers, 1554-1931.
- William Sampson papers, 1806-1849.
- William Short papers, 1778-1853.
- William Sydney Thayer papers, 1835-1901.
- William T. Sherman papers, 1810-1897.
- William Tappan autograph collection, 1640-1939.
- William Taylor papers, 1775-1859.
- William Thornton papers, 1741-1865.
- William Vans Murray papers, 1778-1805.
- William Wirt papers, 1802-1858.
- Williams family. John Warren Williams family papers, 1839-1895.
- Williams, George F., 1817-1882. George F. Williams account book. 1864-1882.
- Williams, John Warren, 1815-1843. John Warren Williams family papers, 1839-1895.
- Williams, Martha Ann Tilton, 1827-1919. Martha Ann Tilton Williams travel journal. 1894-1895.
- Willie Person Mangum papers, 1771-1906.
- Winslow family. Patterson-Winslow family papers, 1813-1963.
- Winslow, Francis, 1818-1862. Francis Winslow papers, 1833-1863.
- Winslow, Francis, 1851-1908. Francis Winslow papers.
- Winslow, Harriet Patterson, 1859-1923. Harriet Patterson Winslow papers.
- Wirt, William, 1772-1834. William Wirt papers, 1802-1858.
- Wood, Leonard, 1860-1927. Leonard Wood papers, 1825-1942.
- Wood, Louise Adriana, 1869-1943. Louise Adriana Wood papers.
- Woodbury, Charles Levi, 1820-1898. Charles Levi Woodbury papers.
- Woodbury, Elizabeth Williams Clapp. Elizabeth Williams Clapp Woodbury papers.
- Woodbury family. Levi Woodbury family papers, 1638-1914.
- Woodbury, Levi, 1789-1851. Levi Woodbury family papers, 1638-1914.
- Woodbury, Levi, 1789-1851. Levi Woodbury papers.
- Woodbury, Levi, active 1780-1781. Levi Woodbury logbooks. 1780-1781.
- Woodbury Lowery collection relating to Spanish settlements in the United States, 1517-1803.
- Woodhouse, Henry, 1884- Henry Woodhouse collection relating to George Washington, 1656-1930.
- Wright, Elizur, 1804-1885. Elizur Wright papers, 1793-1935.
- Wright family. Nathaniel Wright family papers, 1787-1917.
- Wright, Irene Aloha, 1879-1972. Irene Aloha Wright papers, 1620-1977.
- Wright, Nathaniel, 1789-1875. Nathaniel Wright family papers, 1787-1917.
- W.W. Corcoran papers, 1791-1896.