The Charles T. Simpson collection contains photographs, account statements, letters, minutes, contracts, typescripts, articles, certificates, membership cards, manuscripts, notes, photocopies, and a plant specimen, which document the lengthy botanical and zoological career of the early 20th century naturalist.

The Ruth Wilson Papers predominantly consists of a series of lecture notes and typescripts on Japanese culture, history, and language. The other series to be found in the collection is a typescript, titled "Cruising for a Florida State Park," detailing an expedition into Volusia country taken with the aim of discovering historic sites in the county, with accompanying photographs of said sites. Also included is a typescript of an article by John James Audubon titled "A Naturalist's Excursion in Florida."