cover 1861 (2 Apr.) entire from Port Elizabeth addressed to Grahamstown, bearing 4d. pale milky blue block of four, cut into the shape of a parallelogram, good margins at foot and at left, cut-into at top and at right, well tied by triangular cancellations; the stamps with light peripheral staining, the entire with filing creases, one of which crosses a stamp; date taken from docketing; a great rarity and an unique franking, the only known block of the "Woodblock" Four Pence on cover