I enjoy decoration. By accumulating this mass of detail you throw light on things in a longer sense: in the long run it all adds up. It creates a texture — how shall I put it — a background, a period, which makes everything you write that much more convincing. Of course, all artists are terrible egoists. Unconsciously you are largely writing about yourself. I could never write anything factual; I only have confidence in myself when I am another character. All the characters in my books are myself, but they are a kind of disguise.