cover 1861 (12 Apr.) letter wrapper from Port Elizabeth addressed to Grahamstown, bearing three single 4d. blue, each with clear to large margins on two sides and touched or just cut-into on the third, tied by triangular cancellations; wrapper, with filing creases which cross two stamps, backstamped "PORT ELIZABETH/AP 12/1861" red oval d.s.; an exceedingly rare franking; in all probability it is unique