Lithograph, 1971, on wove paper, signed, dated and numbered 39/50 in pencil, printed by E. Matthieu, Zurich, published by Editions Alecto, London, the full sheet, framed, Lithograph and screenprint in colours, 1973, signed, dated and numbered 53/75 in pencil, printed by the Royal College of Art, published by the Mark Rothko Memorial Trust, London, the full sheet