cover 1898 (14 Sept.) envelope to England, headed "From No 6466 Sgt P Horgan RAMC", marked "Nile Exped. F. Force" at lower left, bearing 1898 2m. and 3m. cancelled by "KHARTOUM/S.P.S." c.d.s. and showing, on reverse, Wadi Halfa transit d.s.; small tear at top caused through opening and other lesser faults