Historian and author. Correspondence (1945–2008), journals (1973–1984), calendars (1970–2006) and research files from the life and career of western historian Robert Marshall Utley. The materials document Utley’s lengthy service as an historian and administrator for the U.S. Department of the Interior’s National Park Service, his extensive research and writing on the American West, and his role in the development of the Western History Association and the Potomac Corral of the Westerners. His publications focused on a variety of western subjects, including George Armstrong Custer and the Battle of the Little Bighorn; Texas Rangers and law enforcement in the West; Sitting Bull and the Sioux Nation; mountain men and westward expansion; the Indian Wars; and Billy the Kid.