Mount Rushmore still disputed on the basis of the 1868 Treaty of Fort Laramie (see section "Controversy" below). Among American settlers, the peak was known variously as Cougar Mountain, Sugarloaf Mountain, Slaughterhouse Mountain, and Keystone Cliffs. It was named Mount Rushmore during a prospecting expedition by Charles Rushmore, David Swanzey (husband of Carrie Ingalls), and Bill Challis. Historian Doane Robinson conceived the idea for Mount Rushmore in 1923 to promote tourism in South Dakota. In 1924, Robinson persuaded sculptor Gutzon Borglum to travel to the Black Hills region to ensure the carving could be accomplished. Borglum had been involved in sculpting the
John Campbell Greenway (Borglum) History Building in Phoenix where it presides over the entrance lobby in a niche designed for the work. On the wall behind the statue is a large photograph of Borglum working on the almost completed statue. A second casting of the statue, located in front of the Arizona Historical Society building in Tucson, Arizona, was dedicated on April 11, 1975. John Campbell Greenway (Borglum) John Campbell Greenway is a 1930 bronze statue of John Campbell Greenway by Gutzon Borglum, one version of which was installed in the United States Capitol, in Washington D.C., as part of the National Statuary Hall