cover CE-CF and SI-SJ pairs in different shades, used together with 1841 2d. plate 3, HA-HC strip of three, on entire letter from the Cox correspondence dated 1 August 1842 sent from Ipswich to North America, all with margins all round and neatly cancelled in black; vertical filing fold crosses CF, SJ and HC causing some minor defects which have been improved to enhance appearance but which in no way detract from this superb and extraordinarily rare item. Photo on back cover