Steamboats of the Fort Union Fur Trade by Michael M. Casler
From rear cover notes: "The great drama of a unique period of American History: 1831-1867. Fort Union, the best built and Grandest post on the Upper Missouri River, head of steamboat navigation for twenty-seven years. The days when steamboats plied the dangerous waters of the Missouri River, supplying the far-flung posts and forts of the American Fur Company. Looking out from the river banks before the fort, a rich sweep of the early transportation history. Steamboats of the Fort Union Fur Trade provides an in-depth reference work and histories of the one hundred forty-four pioneer steamboats. Abundantly illustrated with photographs and artwork of the period."