Commodore in the US Navy (1781–1867) who claimed California for the United States in 1846. Partly-printed DS, one page, 7.75 x 9.75, November 2, 1848. Secretary of the Navy James Y. Mason orders a midshipman to “proceed to Norfolk, VA, by the 15th inst. and report to Commo. Sloat for duty on board the U.S. Frigate Raritan.” Signed by Young at the conclusion and endorsed by Sloat, “Rep’d 17th Nov 1848, John D. Sloat.” Two horizontal folds, and light scattered creases and toning, otherwise fine condition. RR Auction COA.