cover CC-CD, CI-CJ, DA-DB and EA-EB, pairs used together on entire letter from Overton addressed to "Wm. Tanner, Swan River, Western Australia", showing fine strike of the red oval "PAID SHIP LETTER/LONDON" datestamp of 22 March 1841, the adhesives mostly with margins all round, cancelled in black; the adhesives with some wrinkling caused by gum constriction and a few other minor faults but still a fine and exceedingly rare item. Photo