cover 1912 (Mar.) envelope (small faults) registered to U.S.A., bearing KE 6c. and 10c. (2) tied by type Eii c.d.s. and showing boxed "CANTON:B.P.O." registration h.s.; 1918 (2 Nov.) envelope registered to Switzerland, bearing "CHINA" 10c. vertical pair tied by type Eii c.d.s., showing fine framed "CANTON:B.P.O." registration h.s. with Censor label at left tied by violet oval cachets