Northern Prairie Wildlife Research Center
These fur traders along with John Colter, Manuel Lisa, Thomas James, Jedediah Smith and others, explored the Yellowstone and upper Missouri Rivers for its fur potential. They constructed some of the first trading posts in Montana along the Yellowstone and Missouri Rivers. In addition to a journal kept by Ashley, Thomas James recorded the history of their activities. Ashley's journal includes a trip down the Bighorn and Yellowstone Rivers but contains very little natural history information of this region.
Dale, H.C. 1941. The Ashley-Smith explorations. Glendale, CA. Douglas, W.B. 1916. Three years among the Indians and Mexicans - Thomas James. St. Louis, MO. Frost, Donald McKay. Notes on General Ashley. (letters from Daniel T. Potts). Morgan, D.L. 1954-1955. Journal of William H. Ashley. Missouri Historical Society Bulletin, Vol. 11 #1-3 Morgan, D.L. 1964. The west of William H. Ashley. Denver, CO. Sullivan, M.S. 1934. The travels of Jedediah Smith. The Fine Arts Press. Santa Anna, CA. Vinton, S. 1926. John Colter, discoverer of Yellowstone Park. New York.