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, painter, interior decorator, poet, author. Collection includes correspondence, artwork (sketches, watercolors), exhibition catalogs, photographs, writings, and memorabilia, including financial material.

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.