Correspondence, 1863-1897; personal documents, manuscripts, and published material of the American physicist.

Correspondence, diary, expedition journal, financial material, scientific notebook and sketches, photographs, published material, including articles and newspaper clippings, and scrapbooks. Correspondence (1854-1902) includes that of Alexander Agassiz, Charles E. Beecher, E.D. Cope, James D. Dana, J.S. Diller, G.K. Gilbert, G. Brown Goode, Asa Gray, Robert T. Hill, Anna Hyatt Huntington, Hyatt’s father, Alpheus Hyatt, Audella Beebe Hyatt, Jules Marcou, Harriet Randolph Hyatt Mayor, A.S. Packard, Charles Schuchert, and Charles Walcott.

Papers of the American sculptor, specializing in equestrian figures and animals. Correspondence, 1887-1965; diaries, 1925-1958; articles; exhibition catalogs; financial and legal material; manuscripts; and photographs.

Correspondence, writings and memorabilia of the American author and Twain biographer.

Papers of the American clergyman, educator. Chaffee was a Presbyterian minister in New York City. Correspondence, letters to magazines to which Chaffee contributed, notes, sermons, scrapbooks, diaries, and published material. Sermons (1914-1936) include such topics as religion, specifically Christianity, and its relationship to politics, labor, technocracy, war, pacifism, communism, and socialism.

Correspondence (1892-1960); diaries, genealogical materials, notebooks, photographs, printed material, including articles and clippings, scrapbooks, memorabilia, and sketchbooks. Correspondence includes that of Adelaide Cole Chase, Clara Carter Hyatt Coad, Anna Hyatt and Archer M. Huntington, Audella Hyatt, and Alfred G. Mayor.

Correspondence, a diary, lectures, manuscript drafts of books, news releases, notebooks, notes, research material, scrapbooks, and memorabilia, including awards, clippings, and photographs. Material relating to the Korean War and the Vietnamese Conflict.

The correspondence, memorabilia, and writings of journalist and diplomat Nicholas Roosevelt

Genealogical and personal information on the Noyes family, founders of the Oneida Community; historical material concerning the Oneida Community and its commercial offspring, Oneida Community Ltd, manufacturer of silverware and china (among other things); and Noyes' correspondence with family and business associates.