cover Hoi Hao: 1902-12 envelopes (7) bearing various values (42), including 1902 registered cover to Netherlands bearing 1901 5f., 1904 cover from Paris to Hoi Hao bearing 2c. (3) + 4c. with General Issue Due imperf. 15c. applied on arrival, and 1912 registered cover to Paris bearing 1908 1c. to 10f.