i) signed (lower left), ink on paper, 29 x 44 cm (11 3/4 x 17 3/8 in), ii) 1961, signed, dated and located (lower right), ink on paper, 32 x 47 cm (12 5/8 x 18 1/2 in), iii) 1987, signed, dated and located (lower right), ink on paper, 22.5 x 31.5 cm (8 7/8 x 12 3/8 in)