Dear Noel, I am in a bit of a quandry. In April 1970 you played at the Stadium in Sydney. I was there and it was the first time I had been on a date with Julie Smith. It was also the last but that's not why I write. I am certain that you sang Mary Beth while playing the melody. Others say it was Peter Yarrow who wrote and sang it. My memory of the event is clouded but I am certain you sang it. it has stayed with me, even though Julie Smith did not.