Research materials pertaining to the history of the Florida Keys and the construction of the Florida East Coast Railway. Documents include letters from Key West pioneers, maps, engineers' notes, newspaper clippings, 35mm slides, photographs, cassette tapes, VHS tapes and copies of maps, blueprints and 1950s postcards.

Original materials include 35mm slides, handwritten notes and interviews with Marathon pioneers.

Real estate records, financial ledgers, classroom material, personal correspondence, ephemera, survey maps and plans. Also include photographs, videos and film reels of her life and social activities.

Correspondence, clippings, and typescripts of articles and books by Griswold. Much of the material pertains to his unpublished work on Dr. Henry Perrine. Articles date primarily from the 1940s, when Griswold was freelancing in Key West.

Correspondence, newspaper clippings, genealogical material, and photocopies of 19th century letters pertain to Indian Key history, especially the estate of Jacob Housman, who owned much of the island until Indians destroyed the settlement in 1840.

A diary of a 1960 visit to Jamaica (probably by Mrs. Griswold) and typescripts on Islandia (by C.P. Idyll) and the Museum of Science.

Source material, correspondence, typescripts, and photographic prints pertain to Griswold as a writer and conservationist. Includes a letter from William C. Sturtevant about the political action leading to the establishment of Everglades National Park; correspondence relating to the Historical Association's preservation of the Housman grave marker from Indian Key; material about the 1905 murder of game warden Guy Bradley, a victim of the egret plume trade; a radio script: Going places with Griswold; and detailed outlines for a proposed South Florida handbook, to be written by Griswold and Charles Brookfield.

35mm mounted slides (primarily Ektachrome) of Caribbean, Central and South American sites. Dates, when given, are for 1958-1961.