@All Thanks for the kind remarks. Who would ever have imagined that Van and Cliff could pull off a duet.
On youtube there is a review of Van's work from 1964 to 1974. It is a good documentary, in 11 parts, with Van giving insights
to his early musical experiences, and who he listened to ( Leadbelly, Woody Guthrie, Carter Family ).
I would say this song is heavily influenced by the Carter Family.