b"It's Only Natural to Try (#144), Split Up (#148a),1969 1969 watercolour on paper, 30.5 x 22.5 in. (77.5 x 57.1 cm)watercolour on paper, 30.5 x 22.5 in. (77.5 x 57.1 cm) Signed, titled and dated recto Signed, titled and dated rectoPlaces of Duration (#154), Multiple Focus (#149),1969n.d. watercolour on paper, 30.5 x 22.5 in. (77.5 x 57.1 cm)watercolour on paper, 30.5 x 22.5 in. (77.5 x 57.1 cm) Signed, titled and dated rectoSigned, titled and dated recto 17"