You told me recently that you'd been to the Science Museum and you'd been looking at scientific images. Yes, but that's nothing of any interest. You see, one has ideas, but it's only what you make of them. Theories are no good, it's only what you actually make. I had thought of doing a group of portraits, and I went there thinking that, amongst various things, I might find something that would provide a grid on which these portraits could be put, but I didn't find what I wanted and I don't think it's going to come off at all. Are there certain images that you go back to a great deal, for example Egyptian images? You look at the same things a lot, don't you?