cover SUDAN: 1885 (Jan.) U5 to Ireland, marked "Nile Expeditionary Force, Field Service", bearing G.B. 1d. lilac (defective) tied by London duplex for 27 January, two Irish transit d.s. on reverse; the envelope extensively repaired and strengthened though of good appearance. A rare item of mail from the Expeditionary Force sent up the Nile to rescue General Gordon at Khartoum. Photo