Color intaglio relief on Arches, 1976-77. 545x705 mm; 21½x28 inches, full margins. Artist's proof, aside from the edition of 12. Signed, titled, dated "77" and inscribed "A/P" in pencil (all very pale), lower margin. Printed by Robert Blackburn's Printmaking Workshop, New York. From the Yucatan series.
