In this work, an irregular blue disc hovers in front of a field of green and purple, seeming to expand and contract within the flat picture plane. Even when he eliminated recognisable subject matter, Heron’s abstractions stemmed from his observations of the visual world. He denied that he consciously painted ‘landscapes’, but affirmed: ‘the enormously powerful rhythmic energies of the granite outcrops beneath my feet transmit certain rhythms straight up through the soles of my shoes every minute of the day.’