The records document business activities of the Guantánamo Sugar Company.  The materials consist of the official records of the Guantánamo Sugar Company offices located at 120 Wall Street, New York, from 1915 through 1959.  These records include correspondence, ledgers, financial records, and other documents of this company which was the owner of the Soledad Sugar Mill, Los Caños Sugar Mill, the Isabel B. Sugar Mill and the Guantánamo Railroad Co. all located around the Guantánamo Bay.

The Jamaica Manuscripts Collection contains 20 documents, most of which concern Jamaica in a variety of ways (others are regarding the British West Indies at large). Included, among other things, are plantation records, correspondence, journals, official documents such as power of attorney documents and affidavits, notes on the climate of Jamaica, and Spanish reports on English possessions.  Some of these are originals, where others are later 20th century documents about Jamaica or typescripts of letters.

The Lemuel Adams Papers contains a ledger belonging to Lemuel Adams. There are logged transactions from 1792 to 1804, mostly from Hartford, Connecticut; however, the ledger also contains letters written by Adams, a genealogy of the Adams family, and a few dozen poems by Adams with titles ranging from "On Life" to "Description of the Tea Party."

The collection contains a single account book for the Parker Printing Company, documenting sales from 1924 to 1931. George E. Merrick was a regular customer of the company in the earlier years.

Ralph Middleton Munroe (1851-1933) settled in Florida in 1891, drawn by its lush tropical landscapes and beautiful seashores. An avid yachtsman and photographer, the Commodore traveled the South Florida coast capturing images of its pristine wilderness and the early inhabitants. Munroe’s photographs provide a unique visual record of South Florida history before its rapid urbanization. The Ralph M. Munroe Family Papers contain a rich assortment of photographs, albums, postcards, correspondence, clippings and manuscripts that document the frontier life in Coconut Grove.