Correspondence of the Adair, McFarland, Remington, Crothers, and Ward families (primarily typescripts), relatives of abolitionist John Brown. Collection also includes newspaper clippings, pamphlets, and genealogy.

Research papers of Clarence S. Gee, leading authority on John Brown. Collection consists of correspondence, notes, published articles, artifacts, and photographs on John Brown and the Brown family.

Various papers and photographs of the Mills Thompson family of Hudson, Ohio.