'Surveyor Generals Office. San Francisco California October 1st 1862. [signed] E.F. Beale, U.S. Surv. Genl. Nevada Terry.' In upper right corner: 'Ho. Reps. Ex. Doc. No. 1. 37th Cong. 3d. Sess.' Relief shown by hachures. Scale [1:253,440] 1 in. to 4 miles (W 120°08--W 118°40/N 39°45--N 38°00)