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 work on the monument to trail drivers commissioned by the Trail Drivers Association. He completed the model in 1925, but due to lack of funds it was not cast until 1940, and then was only a fourth its originally planned size. It stands in front of the Texas Pioneer and Trail Drivers Memorial Hall next to the Witte Museum in San Antonio. Borglum lived at the historic Menger Hotel, which in the 1920s was the residence of a number of artists. He subsequently planned the redevelopment of the Corpus Christi waterfront; the plan failed, although a model for a statue