“Once I have started, then I can be quite fast. In other words, I write fast but I have huge blank periods. It’s a bit like the story of the great Chinese artist—the emperor asked him to draw a crab, and the artist answered, I need ten years, a great house, and twenty servants. The ten years went by, and the emperor asked him for the drawing of the crab. I need another two years, he said. Then he asked for a further week. And finally he picked up his pen and drew the crab in a moment, with a single, rapid gesture.”