Thomas Cruse was a Helena, Montana, miner, banker, and businessman. This collection (1841-1956) consists of incoming correspondence; legal and financial records; maps; reports; and miscellany. Records for Cruse's various enterprises are divided into nine subgroups including the Thomas Cruse Savings Bank; Thomas Cruse Estate; Thomas Cruse Mining and Development Company; etc.

Edward Mattox (1880-1894) was a Roundup, Montana, coal mine operator and owner of the K7 Ranch near Bozeman. Papers (1906-1948) consist of correspondence, financial and production records, and legal documents of Mattox, the Roundup Coal Mining Company, and the K7 Ranch.

These U.S. Federal Power Commission records consist of hearing materials in a case involving the failure of the Montana Power Company to apply for a license to operate its hydroelectric dams on the Missouri River and tributaries. Exhibits in the case (including steamboat logs, diaries, articles, clippings, etc.) sought to document whether the Missouri River was navigable above Fort Benton. [FPC Docket #IT-5840.]