MILITARY CONCESSION MAIL FROM KHARTOUM RESCUE FORCES; Jan. 1885 env. (peripheral faults; flap defective) headed From M.Sullivan Skilled Shipwright/H.M.S Monarch Alexandria and endorsed by Commanding Officer below, franked 1d Lilac and tied in transit by London barred "F.B" (Foreign Branch) cancel. Rear with Birmingham and Sparkbrook cds. H.M.S Monarch was part of the rescue forces during the siege of Khartoum. Cross Reference: INCOMING OVERSEAS MAIL, EGYPT, LONDON POSTAL HISTORY, G.B USED ABROAD STAMPS & COVERS (Image)