Gustave Singier (1909-1984) Rythme. 1959. Lithograph. 224 x 293, printed in color. Very fine proof on cream vellum, numbered, signed and dated in pencil. Short creases and slight foxing to the edges of the folio. Full margins. Edition of 50 proofs. Joint: Greeting card for Sources Gallery. 1958. Lithograph. 258 x 162. Printed in color. Fine proof on vellum, numbered, signed and dated in pencil. Traces of oxidized adhesive tape around the verso, showing through to the recto. Full margins. Edition of 40 proofs. Set. 2 p.