cover 1902 (6 Jan.) mourning envelope registered to Yorkshire, bearing 1882-88 1a. and 1892 2a.6p. pair tied by two strikes of "B" in bars, showing framed "R/ZAILA" h.s., circular-framed "AR" in purple with, on reverse, "ZAILA/B.O./SOMALI COAST" c.d.s. and Aden " REG" transit d.s. (2.2). A rare and most attractive franking. Photo