'In 1970 I made (un-made) my last sculpture, certainly of that kind, at the ICA exhibition British Sculpture out of the Sixties. At the same time there was a show in Japan, the other side of the world, where I had sent one of my earlier floor sculptures. At the ICA I delineated the precise shape of the piece sent to Japan on the gallery floor. It was a painted floor, and having delineated the shape I sanded away the paint. So I didn't put anything into the gallery, I took something out, I took the paint out. People came to see the show and were standing in the area looking at other sculptures, not noticing it often, which in a way I enjoyed - it gave it a completely different dimension...' DH, interview by Stephen Partridge, Transcript magazine vol 3, issue 3, 1999.