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 (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.

Papers of the American sculptor, including original artwork and reproductions, correspondence and memorabilia as well as some family history of both Frishmuth and her longtime companion Ruth Talcott.