1941 internal censored envelope addressed to Port Sudan franked 15m adhesive tied 'F.P.O. NO 13' hatched circle c.d.s. '16 JAN 41' allocated to Gelbeit. Large double boxed 'PASSED/ BY / UNIT/ CENSOR/ 215' struck in violet allocated to the Royal Sussex Regiment, which was attached to the 7th Brigade 4th Indian Division. A rare censor.