cover 1940 XU5 to England and U.S.A., each showing fine double oval "INTERNMENT CAMP/TRINIDAD & TOBAGO" cachet in violet, 1941 XU5 from G.B. to an internee in Trinidad, undated XU5 from an internee in Trinidad, to New York and with Crown Censor cachet in violet, and 1942-43 XU5 to England, U.S.A. (2) and registered locally, each showing fine "Exempt from postage under International Convention regarding Treatment of Prisoners of War" cachet in violet. A scarce group.