A story he told that I enjoyed was when he was in the States and opened for Doc Watson. He played a song in the Doc's repertoire, and only realised it after doing it. Feeling embarrassed at having trodden on the Doc's toes, he apologised to DW, who replied: "That's OK son, I didn't recognise it anyway" :-)

(Words may not be 100% correct but that was th gist of JR's tale).