I remember in about 1964, being in a folk club in London, when in walked this young guy with a guitar. He asked if he could do a song, and having got a nod from the organiser, he got up on the small stage there and started singing. A hush fell on the room as soon as he started - everyone there was mesmerised. The song had such powerful words, and he had a charisma that had everyone in the room transfixed. When he finished the song, there was a pause of about a second, and then the room erupted into applause, that seemed to go on for a long time, but was probably about five full minutes before it subsided. The guy thanked us and walked away.

Nobody ever saw him again. We never did find out who the heck he was.