Small world, Trotter. I met your uncle last week, in his capacity as a tour guide, and he ended up showing me the picture from the start of the thread. He was comparing the work of mediaeval stained glass artists to that of Peter Jackson, at which point my wife piped up that I was a Tolkien fan. "In that case, I've got something to show you later," he said.
Trotter wrote:
Very similar item to the book that my Uncle found, listed on eBay.
eBay Item #400754584972
The world is insane if a 1970s LoTR is worth that much, signature or otherwise.