b'Separate Existence (#88),Accumulated Detail (#104), 19691969 watercolour on paper, 22.5 x 30.5 in. (57.1 x 77.5 cm)watercolour on paper, 22.5 x 30.5 in. (57.1 x 77.5 cm) Signed, titled and dated recto Signed, titled and dated recto Sensible Elements (#79),Space is Traversed (#75), 19691969 watercolour on paper, 22.5 x 30.5 in. (57.1 x 77.5 cm)watercolour on paper, 22.5 x 30 in. (57.1 x 77.5 cm) Signed, titled and dated rectoSigned, titled and dated recto16'