At upper left corner: 'Department of the Interior, U.S. Geological Survey.' 'E. M. Douglas, geographer; R. G. Chapman, in charge of section; triangulation and topography by R. H. Chapman and B. D. Stewart. Surveyed in 1905.' 'Engraved April 1906 by U.S.G.S.' 'Edition of June 1908, repritned 1929.' 'Polyconic projection. North American datum.' Guide to Topographic Maps of the United States series on map verso. UNLV Special Collections Southern Nevada Mining Map Collection