lithograph printed in four tones of grey, 1974, on Rives, signed and dated in pencil, numbered 1/14 (there were also 4 artist's proofs), published by Petersburg Press, London, the full sheet as published, in good condition
L. 1,067 x 763 mm.
拍品专文
The illustration for Wall Chart III is mistakenly placed against the description for Wall Chart IV in the Williams College catalogue.