Does everybody but me know he was a painter?
There's a large collection of his watercolors up for sale at Ahabooks.com.
The prices put them well out of my range--but you can look for free, and
they're quite well reproduced (http://www.ahabooks.com/).
Don't be put off by the first few as you scroll down if, like me, you find
them too pretty--there are more interesting ones further on/down, and some
are downright stunning to my untutored eye.
I have a feeling Mark Weiss will soon come along and tell me why I have no
taste, but I'm not too proud to take a free tutorial....