Account books, 1874-1900, personal store account books for Henry Trathen, small notebooks kept by the customer to record purchases made on credit. Includes account books from general stores Harris Seager & Co. in Ripley, Michigan and Graham Pope in Houghton, Michigan.

Letter books, 1862-1905, from various law offices in the Houghton County, Michigan area. Also includes several freight books from the steamer IVANHOE as well as ledgers from the merchant firm, J. Hoar & Brother.

Correspondence, 1859-1910, received and sent by Richard M. Hoar, a prominent early citizen of Houghton, Michigan. Includes correspondence pertaining to his business with his brother, J. Hoar & Brother, a general merchandise business, as well as other business related correspondence, bills and receipts. Also includes correspondence from his capacity as a member of the Michigan state legislature and Houghton town official.