Map of the Washoe District Showing Mining Claims. United States Geological Survey. Geology of the Comstock Lode, &c. Atlas Sheet III. Claims Mapped by Hoffman and Craven, 1881. Topography by U.S. Geographical Surveys West of the 100th Meridian. G.F. Becker, Geologist in Charge. Julius Bien & Co. Lith. N.Y.