WW2 SECURITY CANCEL DUMB MINIATURE CIRCLE CENSORED SIGNED IVOR SIBLEY to WALESEnvelope signed Ivor Sibley to Cardiff; KG6th 2 1/2d single franking; miniature security cancel, dumb circle (no town) dated 27 June 1944, clear crown + shield PASSED BY CENSOR No.1165 in voilet.