Etching, graphite and opaque white on wove paper, 38 x 28.5 cm (sheet). 1960. State proof with revisions and annotations on the further processing of the plate together with the planned execution of the printing by André Masson. Monogrammed "A. M" in pencil, inscribed "Essai", titled "L'Enigme" together with an alternative title "Gravure dans le goût romantique". Only impression of the 2nd state (of 4). Provenance: Ex collection Roger Passeron