cover 1893 envelope (with original enclosure headed "Houseboat-near Maing Chiang") to U.S.A. (20.3) circular "LOCAL POST AGENCY/FOOCHOW" h.s. in blue and bearing U.S.A. 5c. (faults) cancelled by "U.S. POSTAL AGENCY/SHANGHAI" duplex. Rare subscribers letter of the Foochow Agency of the Shanghai Local Post