Abstract Pierre Chouteau, Jr. and Company was a St. Louis, Missouri, based fur trading company with operations on the Upper Missouri River, including the area that later became Montana. Records include a letter from Pierre Menard (1810) from the region around Three Forks; Fort Benton Journal, Fort Sarpy Journal, and Fort Union Journal (1854-1856); and scattered correspondence and financial records (1834-1864). [Includes copies. Journals published in Contributions to the Historical Society of Montana,...