Why did Samuel Beckett draw doodles of Charlie Chaplin?

On a wet morning at the University of Reading, six old school exercise books are laid carefully out on a table. About 80 years old, they look remarkably well-preserved. The pages are filled with hard-to-decipher handwriting, but what's striking to the casual observer is how much Beckett draws as well as writes. There are famous faces, historical figures and musical notes. An unmistakable Charlie Chaplin appears on the same page as a self-portrait of Beckett. The doodles appear to show that the author of Waiting for Godot also spent some of his time waiting for inspiration.