I did this drawing at college. It shows the Wart meeting Merlin, a scene from "The Sword in the Stone" by TH White.
I'm sure I must have posted it before but it was a very key image in my college career and it directly lead to me doing this book cover for the book for Collins one of my first publishers.
The little vignette of the Wart and Merlin reading appeared on the back cover of the book. I can't find the book for sale anywhere on line. It must be a bit of a rarity.