As a child, I intended to be a writer—a novelist, of course. It's a common dream. The nearest I seemed likely to get, as an adult, was in the job of scriptwriter-producer for the School Broadcasting Department of the BBC. This experience, over thirteen years, must have helped as much as any to make me into a writer of children's books. I wrote for the same public, changing only the medium. (p. 169)

In 1951, while I was working for school broadcasting, I contracted tuberculosis. I went into hospital in Cambridge for most of that summer, a particularly fine one. I didn't feel ill at all, and it seemed almost unbearable to be lying in bed missing all of the summer on the river, only five miles away, in Great Shelford, where I had been born and brought up…. Imprisoned in hospital, I went there in my imagination as...