I'll give you a clue mad: he's not, as far as I'm aware, in any of the novels, and a revision of the book he's in involves turtles and their ability to remember!
I can't think of one at the moment. Mad can do the honours.
If you can fill the unforgiving minute,
With sixty seconds worth of distance run,
Yours is the Earth and everything that's in it,
And - which is more - you'll be a man my son.