William Bradford Waddell. [State Historical Society of Missouri, Waddell Smith Photograph Collection, P0727]

William Bradford Waddell typified the mid-nineteenth-century entrepreneur who shaped the…

Snags (Sunken Trees) on the Missouri, print replicating Karl Bodmer’s painting, 1841. [State Historical Society of Missouri, Art Collection, 1958.0006c1]

The Yellowstone Expedition of 1818–1820 was a military and scientific excursion in which the United States…