James S. Dunn and Company was a commission merchant house in Helena, Montana Territory, handling fish, game, poultry, fruits, and produce. The store also operated under the name of Thomas C. Patrick and Company (prior to February 1888) and Jackson, Dunn and Company (from February to November 1888). Collection (1887-1889) includes correspondence; financial records, including ledgers, invoices, cash books, day books; legal documents; and miscellany.