cover 1890 (20 Aug.), cover from Eastern Telegraph Co.'s cable-layer in Mombasa addressed to London, bearing Indian 4½a. yellow-green with red manuscript "B.E.A.", tied by "MOMBASA/C/AU 20/90" single circle datestamp; cover, somewhat soiled, backstamped at Aden in transit and 9 Sep. upon arrival; spectacular and rare. Photo