[Washington, D.C.]: [U.S. Congress], 1850. Lithographed map (21x19½"), plus margins. Fold lines, as issued. Light general wear; a very good map. This map, created by U.S. Army Topographical Engineer Lt. George Horatio Derby, documents the reconnaissance tour of Brig. Gen. Bennet Riley, the last Military Governor of California, through the..... More