I have heard the recording of Dylan singing "Sally Free and Easy". Geoff Harden organized a folk club in Belfast some years ago and when Cyril guested one evening, Geoff played the Dylan recording over the PA system. A poor quality recording, as I remember, but I had no reason to question the authenticity of the recording. I only ever bought one Dyland bootleg myself and the quality of the recording was so bad I eventually gave it away.