"People 'think' in different ways, and I find that I think most effectively graphically and also that my thinking is influenced a great deal by my ability to get it down where I can 'look at it' and think about it further-the process of thinking with me generates more thinking-the notebooks, in other words, have been not only a way of 'recording' ideas but also of 'generating' ideas...they are ways of running out what I call series of alternative...