Very sad to hear of his death. Almost certainly the finest comic writer of the generation.
For me the best stuff was the essays he did at Punch, while he was editor there. This is a book of the best of them.
From that book, this is the one that I remember the most. (You might have to fiddle about to see it. Put "Moses" into the see inside bit and it starts on page 28. Fiddle about and you can read the whole of it.)
He aready has his monument I would say.