cover 1869 (21 Aug.) entire letter from Saigon via Singapore to Mauritius, marked "per Engl. Mail", bearing 4c. on 1a. brown (2) and 8c. on 2a. yellow (2) tied by two strikes of Singapore "D14" duplex and additionally by Singapore firm's chop, showing Saigon firm's chop at lower left, Mauritius "1d/TO PAY" h.s. and, on reverse, Aden (8.10) and arrival (29.10) datestamps. A beautiful franking of the utmost rarity. Photo