George D. Hollecker (1866-1931) was a Glendive, Montana, merchant and stockman. Collection (1883-1932) consists primarily of business records produced during the operation of the G.D. Hollecker general merchandise store in Glendive, plus various records of ranches and investments in Glendive and Dawson County.

John T. Murphy (1842-1914) was a Helena, Montana, merchant, rancher, banker, and mine investor. Collection (1865-1935) includes correspondence, financial records, legal documents and other material of Murphy, the Murphy Estate, and various companies he founded, including the Powder River Land and Cattle Company, Montana Cattle Company (Seventy-Nine Ranch), and the Murphy-Maclay Hardware Company.