cover 1914-17 envelopes (2) and a card from South Africa, one showing "ARMY BASE OFFICE/4" d.s.; 1916-18 censored envelopes (5) from South West Africa, one showing mutilated d.s. of Windhoek; and 1915 unstamped envelope "On active service, no stamps available" with fine "DUALA/KAMERUN" d.s., part of the address deleted; 1942-44 Jamaica envelopes (3) showing Canadian Army censor cachets