NORMAN ACKROYD, R. A. (B. 1938) Black Forum; Square Composition (i) signed and numbered (bottom margin) 34/50, Ackroyd  (ii) signed and numbered (bottom margin) 19/50, Ackroyd  etching, unframed  image: 11.7 x 11.7 cm (4.4 x 4.5 in) sheet: 16 x 19 cm (6.7 x 7.5 in) (2) Artist's Resale Rights may apply on this lot.