TYLER, JOHN, President. Partly printed document signed ("J. Tyler") as President, countersigned by David Henshaw, Sec. of Navy, Washington D.C., 25 August 1843. One page, oblong 4to, ON PARCHMENT, backed with paper, minor foxing, right hand margin lightly damp-stained, calligraphic text headed "The President of the United States," accomplished in manuscript. Appointment of William K. Mayo as "a Midshipsman in the Navy."