Ray,I remember Walter Greaves well, Ron Darnbrough probably knows more about him than me but I first saw him when he used to go to art classes when I was at Batley Art College and then I saw him around the folk clubs back in the 70's. He used to do a great monologue called 'Billy Bates' Christmas Tree' and other Yorkshire stuff.
I can remember Ron telling me Walter once gave him a lift in a van he had, obviously Walter only had one arm and the van wasn't converted for a disabled person so every time he changed gear he had to take his arm off the steering wheel. Dunno what happened to him eventually.