Two lithographs in black on wove paper, 1970, both signed, titled and dated in pencil, numbered 16/20 and 17/20 respectively; and Untitled, lithograph in black on wove paper, 1970, signed, dated and inscribed 'cancellation proof' in pencil. Both Heads 10 x 12 in. (sheet), unframed; and Untitled 20 x 18 in. (sheet), unframed. Condition: Heads with full margins and very pale staining at the sheet edges. Untitled with the full sheet and a tiny tear at the bottom sheet edge. Pale staining. Staining and remains of old hinges on the reverse.,