Project for a theatre set XI, colour group E (Random) John NIXON Project for a curtain for an opera house, colour group E (Spectrum) John NIXON Cat's cradle Wilma TABACCO Signe 13 Victor VASARELY Slab Michael PEEL Untitled (London suite) Roger KEMP Marks and Witness: A lined crossing in Tribute to William Barak Brook ANDREW Arrested movement from a trio Roy de MAISTRE