cover UNITED STATES POSTAL AGENCY: 1910-22 a range of covers (5), cards (2) and a piece, all outgoing mail (except one card), and including 1920 from Tsinanfoo to Germany bearing overprinted 1c. and 2c. (7) cancelled by oval registration h.s. (type 3) and pen cancels, additionally showing double-ring (type 4) receiving c.d.s.; 1922 covers (3) bearing unoverprinted values to 10c., all cancelled by duplex, 1910 incoming card showing receiving c.d.s. (type 2a); an interesting group