Andreas: I did that because it worked fast, not because I am having trouble drawing realistically. The documentation and drawing technique (site-editor: This technique is called, in Dutch, schaafkarton) took a lot of the time. In the chapter about 'Agatha Christie', for example, I used only photographs. I was in a hurry and the story had to be finished quickly. I would never do that again, though, since you are only copying and not really drawing.