Great Britain. (Under Cover Mail). 1944. Air Mail envelope written from '75 Eaton Square. London' addressed to 'Monsieur Silvart, Directeur de la Revue "Belgica", Periodico de Los Belgas de America, Ayacucho 1507 - 20, Buenos-Aires' bearing Great Britain SG 475, 1s brown, SG 485, 1/2d pale green and SG 489, 2 1/2d pale ultramarine tied by London date stamp with boxed 'T' hand-stamp with 'Examined By Censor/ P & C.B.' (orange on white) label, endorsed '200' in blue crayon (Press and Censorship Bureau). Fine item of undercover mail addressed for the Free Belgian Forces fighting with the Allies.