The sculptor and painter William Turnbull was a pioneer of abstraction in Britain after the Second World War, and his subsequent career has included an exhibition at the Tate in 1973. His works explore concepts of growth and movement. He was influenced by the theory, widespread during the late 1940s, that structures in nature develop as a result of mathematical processes and often take the form of a spiral. Turnbull's Sea Forms is related to this idea. Like the other prints by Turnbull displayed here, this is a monotype, made by painting the image onto a surface and then laying the paper over it. Only one print results but spontaneous, textural effects can be produced.