Mailbox Dick WATKINS Untitled Ludwig HIRSCHFELD MACK (Untitled) Harvey QUAYTMAN Queen of the night Sean SCULLY Moraca Michael JOHNSON Untitled André MASSON Untitled Paul PARTOS Rocky landscape Kenneth HOOD Thru a-z Louise NEVELSON Homage to the square: Autumn echo Josef ALBERS Untitled Peter BOOTH Cornish harbour Kenneth HOOD Beyond the outsider Robert JACKS Points of contact no 7 Victor PASMORE Etude Friedrich VORDEMBERGE-GILDEWART Four-in-one-bird (Moving) Frank HINDER Die Fahne Hoch Frank STELLA Untitled Harvey QUAYTMAN Pilot Dick WATKINS Planes of perception Erica McGILCHRIST 49 three-part variations using three different kinds of cubes/ 1967–68 Sol LEWITT The Location of Lines Sol LEWITT Incomplete Open Cubes Sol LEWITT Untitled (Red rectangle) Peter BOOTH Putting on de Stijl Richard HAMILTON Configuration Roger KEMP The orchard Philip SUTTON Flight in space I Roger KEMP Ascension Roger KEMP Yellow premiss Ian BURN