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
Gutzon Borglum Saint John the Divine in 1901; in 1906 he had a group sculpture accepted by the Metropolitan Museum of Art— the first sculpture by a living American the museum had ever purchased—and made his presence further felt with some portraits. He also won the Logan Medal of the Arts. His reputation soon surpassed that of his younger brother, Solon Borglum, already an established sculptor. Borglum married Mary Montgomery Williams, on May 20, 1909, with whom he had three children, including a son, Lincoln, and a daughter, Mary Ellis (Mel) Borglum Vhay (1916–2002). In 1925, the sculptor moved to Texas to