James H. Carleton to E. A. Rigg, November 26, 1861

Maj. E. A. RIGG, ms First Infantry California Volunteers, Commanding Camp Wright: MAJOR: Proceed at once to Fort Yuma and relieve Lieutentant-Colonel West in the command of that post. The officer next in rank to yourself at Camp Wright will have command of that camp until the arrival of Major Fergusson, First Cavalry California Volunteers, now en route from San Francisco, Cal., direct. Colonel West will repair to Los Angeles to replace the undersigned, now under orders for San Francisco.

Very respectfully, your obedient servant,