Papers of Folsom, an Indian trader, lumberman, land speculator, Minnesota politician, and steamboat owner, including correspondence, 1841, 1851-1900; an account book, 1841-1844, from his business dealings in Prairie du Chien, Wis.; and papers relating to Folsom's activities in the Mississippi-St. Croix Valley. Two additional volumes contain cargo records and passenger lists for his steamboat, the Wyman X, for 1870-1871. Among the correspondence are two letters describing bad conditions in the 1863 Army campaign in the Dakota War of 1862.