Relief shown by hachures.
Coordinates approximate and based on Greenwich meridian.
Compass rose.
Shows topography, vegetation, drainage, mines, routes.
Includes "Distance from Sutters."
Descriptive text throughout.
From a map set including: Topographical sketch of the Gold and Quicksilver District of California, July 25th. 1848 E.O.C.O. Lt. U.S.A. -- Upper Mines. Nos. 1 & 8, [and on same sheet] Lower Mines or Mormon Diggings. No. 3.
"23" at upper right corner.
Appears in Polks' Message to Congress: U.S. Congress. House. Exec. doc. no. 1, 30th Cong., 2nd Sess., December 5, 1848 (Serial 537).