cover 1861 (15 May) cover from Swellendam addressed to Cape Town bearing 1d. vermilion block of four, clear to large margins all round, one stamp with tear, brilliant colour, tied by black triangular cancellation at right; cover, improved and repaired at foot, part flap missing, backstamped "SWELLENDAM/MY 15/1861" and "CAPE TOWN/MY 16 1861" red oval d.s.; a great rarity