1915 stampless envelope to London endorsed at the top O.H.M.S. to an officer on H.M.S. Cumberland. A German DUALA, KAMERUN 27.5.15 datestamp is the only cancel on the cover. H.M.S. Cumberland was sent to West Africa after the beginning of the war in August and supported operations in the Cameroons where she captured 10 German merchantmen at Duala on 27 September. She was assigned to the 5th Cruiser Squadron in January 1915 where she conducted patrols for German raiders and escorted convoys for the rest of the war. A very scarce O.H.M.S. cover from the Cameroons.