Aden. (Aden Protectorate States). 1949. Registered Air Mail envelope written from the 'H.H. Sultan Sir Saleh Bin Ghalib, Sultan of Shiher & Mukalla' addressed to London bearing Qu' aiti State in Hadhramut bearing SG 5, 2a sepia, SG 7, 3a sepia and carmine and SG 8,8a orange-red tied by Mukalla/Reg double ring with registration label routed via Aden. Very fine.