I'm sure the man knows! I am just as certain that he isn't happy about his overly obvious decline.   

Mark Twain said, "There never was a life lived on the planet that wasn't a failure in the eyes of the one who lived it."

Tangentially, I carry a card in my wallet given to me by the National Multiple Sclerosis Society here in the USA. It says, in effect:

TO ALL LAW ENFORCEMENT OFFICERS!!
THIS GUY IS NOT DRUNK!
He has MS. So, if he walks weird, or falls down when he tries to stand up or perambulate, do not DEMEAN, waterboard or arrest, him.
He has an actual disease. His really bizarre behavior, as antisocial and repugnant as it is, is not exhibited because of a character fault in his basic overall makeup!!!

I know that, for at least an entire decade before I was diagnosed, I was exhibiting unique symptoms both on stage and off. I had to sit down to play. The steamboats I played music on used to drop me off on an island in the middle of the Mississippi River where I'd wait in those truly lovely surroundings for their other boat, on which I would do another show on that same day. ------- After having more and more trouble with the shore rocks and negotiating the landing stages and actually falling into the river a few times, the two boats had to meet in the middle of the Mississippi and tie up together so I could step fairly easily from one boat to the other.---Also, I lost the ability to feel the strings on my instruments...

All my fans were great to me. I was a lucky guy to have such support. But if there had been threads like this rambling on about my slow decline, I possibly would've gone the Peter Bellamy route less travelled. ('Nuf said.)

Davey Graham did wonderful work earlier. So did Alex Campbell, Charlie Parker, Chet Baker, Mike Bloomfield, Paul Butterfield, Janis Joplin, Billie Holiday, and so many more. For God's sake, be thankful that you heard them when all were at their zenith. The title of one of my CDs says it all for me:
"The Older I Get, The Better I Was"

Art Thieme