The was a guy called Patrick Campbell, who (as members of a certain vintage may recall) was a regular on 'Call My Bluff' in the early 1970's - he was memorable for having a stammer that was very very obvious and that, somehow, wasn't really a problem in the quiz even when it was obvious.
He wrote a short story that we read at school about his getting a book on 'How to be a Ventriloquist', which goes on to recount his attempts at ventriloquism - my memory is that it was very funny: I can't recall the title of the story and I don't want to re-read it; I'd rather have the memory.