Sudan.(Afrique Equatoriale Francaise - Cameroun). 1941. Air Mail envelope addressed to the French Military, Yaounde, French Cameroun bearing SG 41a, 5m olive and black and SG 80, 4 1/2 on 8p emerald and black tied by El Fasher date stamp '26th Mar 41', endorsed 'Par Avion' with 'Sudan/ 12/ Censorship' label, sent overland to Geneina Fort '27th Mar' and Fort Lamy/ Tchad '2nd Avril' on reverse, then carried by Air Mail to Benin, Nigeria with circular 'Contole Postal/ Afrique Equatoriale Francaise/ Commission G' (applied in Benin) and 'Controle Postal/ Territoire du Cameroun/ Commission B' (applied in Yaounde) on face.
Lovely item sent overland through Darfur Province into Tchad and onwards by French internal African Airways.
Censored in Sudan, French Equatorial Africa and French Cameroun, the Yaounde censor only recorded in June 1941.