Scarce map of Nevada and California, from H. F. Walling and O. W. Gray, New Topographical Atlas of the State of Ohio with Descriptions Historical, Scientific, and Statistical, Together with Maps of the United States and Territories. Cincinnati: Stedman, Brown & Lyon, 1872.
The map is hand colored by counties, and shows US Mail Route, wagon roads (so labeled), and railroads. A few Indian territories indicated (Mono, Root Diggers, etc).
The mining regions of Nevada are named and describved in nice detail. A number of mines are identified throughout the map.