LeRoy R. Hafen
LeRoy R. Hafen (1893–1985) was Professor of History at the University of Denver and Brigham Young University, Executive Director of the State Historical Society of Colorado, and author/editor of numerous books on the American West, including Ruxton of the Rockies, Fur Trappers and Traders of the Far Southwest: Twenty Biographical Sketches, and Handcarts to Zion: The Story of a Unique Western Migration, 1856–1860.