The Broadwater-Pepin Company was a Havre, Montana, general mercantile and licensed trading company opened in 1891 by E.T. Broadwater and Simon Pepin. There was a branch store in Browning, the Broadwater-Pepin Trading Company. The collection (1898-1931) includes outgoing correspondence, financial records, and subject files relating to the operation of the two businesses.

The Browning Mercantile Company was a Browning, Montana, general mercantile firm founded by Thaddeus E. Scriver and Horace C. Willits. Records (1907-1927) include general correspondence (1914-1927), cash books, daybooks, trial balance books, ledgers, and miscellany.

The papers of the DesRosier family of Browning, Montana, consist of incoming correspondence; financial records, including records of Glacier Drug and Browning Drug companies; and miscellany, including a hunting tag and World War II memorabilia belonging to Peter L. DesRosier.