folded lettersheet sent at the unpaid 15c treaty rate, black "15" rate handstamp of San Francisco, endorsed "By Overland Mail" (Central Overland stagecoach to St. Louis), "New York 3 Aug 5" transit datestamp, carried on Cunard's Asia departing Boston August 6 and arriving Queenstown August 16, Calais transit and Mauzé backstamp, very fine, ex-Needs