folded lettersheet addressed to "Major Hamtramck, Commaning Officer, Fort Vincennes", endorsed "Express" and carried outside of the mails, aged at right and trivial ink erosion, very fine early use, Jean François Hamtramck was the commanding officer at Fort Vincennes from 1787 to 1792, military express mail was fairly common during the Revolutionary War and again during the War of 1812 but is rare during peacetime