This series is made up of materials related to Arthur Mastick Hyde's various business dealings. This includes the Hyde Farm, Hyde Motor Sales Co., as well as Hyde's work as a lawyer. The materials include ledgers, correspondence, financial papers, receipts, books, client files, tax returns, news articles, pamphlets, photographs, and other materials. These materials document Hyde's personal involvement in each of these businesses through personal corresondence, news clippings and so forth.

This series is made up of materials related to the personal life of Arthur Mastick Hyde. The materials include correspondence with his wife Hortense, family and friends, as well as financial papers such as check book stubs, receipts, tax returns, and so forth.