United States secretary of state, United States representative and senator from Maine, and journalist. Family and general correspondence, speeches, writings, diaries, memoirs, notebooks, scrapbooks, and other papers documenting Blaine's public career.

Personal, official, and family correspondence, speeches, writings, business records, legal files, biographical material, printed matter, and other papers chiefly documenting the public career and private life of statesman Henry Clay (1777-1852), United States secretary of state and representative and senator from Kentucky; his son, James B. Clay (1817-1864), diplomat, United States representative from Kentucky, and Confederate sympathizer; and other members of Henry Clay's family.

United States attorney general, United States senator, and governor of Kentucky. Chiefly correspondence and some legal papers, speeches, and state papers relating to Crittenden's career in politics and government.

United States representative and lawyer from New York. Letters written by Hubbard to his wife containing descriptions of his journeys to Washington, D.C., the physical layout and social life of the capital, and his impressions of national political figures.

Clerk of the United States Senate and farmer of Fairfax County, Virginia. Chiefly family correspondence of Lewis H. Machen relating to personal matters and national politics prior to the Civil War, especially slavery and the Compromise of 1850, and mentioning John Quincy Adams, Henry Clay, Andrew Jackson, and Daniel Webster. Also includes other correspondence, speeches, writings, subject files, and miscellaneous papers.

Lawyer, U.S. representative and senator from Delaware, diplomat, and cabinet officer. Correspondence primarily between McLane and members of his family relating to social life in Washington, D.C., his diplomatic duties, and national and congressional politics.

Governor of New Hampshire and legislator, United States senator from New Hampshire, essayist, and historian. Correspondence, diaries, letterbooks, autobiography, writings, notes, transcripts of poetry, essays, extracts, and other papers relating to Plumer’s personal life and career in New Hampshire and national politics and as an essayist.

Correspondence, indentures and legal agreements, circulars, pamphlets, and other papers relating to the Polk family, chiefly letters to William Polk. Also includes a biography of William Polk. Other family members represented include Leonidas Polk and James K. Polk.

Resident of Salem, Massachusetts. Letters, clipped signatures, and other autograph items of prominent American and a few British figures, chiefly of the nineteenth century.

Lawyer, United States representative from Massachusetts, associate justice of the United States Supreme Court, and educator. Personal, legal, and professional correspondence regarding cases at law, questions before the Supreme Court, the teaching of history and law, the development of Harvard Law School, and other judicial and political topics.

Wife of architect William Thornton. Diaries and notebooks primarily describing social life in Washington, D.C., with extensive detail about housekeeping and expense matters. Also contained in the diaries are memorandum books, poems, sketches, and silhouettes of unidentified people.

Correspondence, letterbooks, ledgers, account books, legal records, lists, and other material relating primarily to the United States Arsenal in Philadelphia, Pennsylvania, later know as the Frankford Arsenal, and to superintendents of military stores William Irvine and his son Callender Irvine.