1. Wilhelmina Barns-Graham’s Square and triangle on pink and lemon (1987), oil and acrylic on hardboard, 7 x 10in (18 x 25.5cm) from the Wilhelmina Barns Graham Trust, Waterhouse & Dodd.
2. Paul Feiler’s Janicon XCVII (2005), oil, gold and silver leaf, gessoed board on canvas, 3ft 4in x 3ft 4in (1.02 x 1.02m) courtesy of Paul Feiler Estate & The Redfern Gallery.