Claude Williams was a wonderful musician. I heard him when he was in his late 80's - not playing guitar anymore, only violin (or fiddle, as he referred to it), and how he played! When he hit the stand, it was as if he were thirty years younger.
Only heard him play live once, but I'll remember it for as long as I'm around.
Incidentally, Claude Williams' manager also managed Benny Waters at that time. Mr. Waters was then in his 90's.