Bulk of the collection concerns the Apthorp family, especially William Lee Apthorp. Much genealogical information; documents, including two short diaries, deeds, letters, primarily with 19th century dates; an 1877 map of Florida, and items related to William Lee Apthorp's Civil War service (source of some of the diaries). Also included are 24 items relating to the Osgood family, and smaller amounts for the Weeks and Morse families. Other items: William H. Gleason's 1868 Proclamation (against Governor Harrison Reed); and a 1975 publication: The People of lawmaking in Florida, 1845/1975.

Personal papers and scrapbooks include clippings and memorabilia related to numerous civic and World War II home front projects such as the American Red Cross Camp and Hospital Service, the American Legion, Veterans Hospital and  the Boy Scouts. Except for some brochures and photographs of the San Carlos, there are no documents pertaining to his business enterprises.