“Well, it's always very difficult to say what prompts anybody to do anything, let alone getting underwater and teaching ravens to fly. But I think it probably all dates back to a very early age, when I was quite a young fellow. My mother, Lady Beryl Streeb-Greebling, you know, the wonderful dancer — 107 tomorrow and still dancing — she came up to me in the conservatory — I was pruning some walnuts — and she said "Arthur" — I wasn't Sir Arthur in those days — she said "Arthur, if you don't get underwater and start teaching ravens to fly, I'll smash your stupid face off," and I think it was this that sort of first started my interest in the whole business of getting them underwater.”

"Ravens" (1965)
Not Only... But Also (1965 - 1970)