Walter sang more or less in the manner people probably always sang folk songs - he certainly learned from his uncles who were product of the 19th century
I'm not talking about listening to old recordings

Walter didn't do 'in-beween banter as far as I know - he took his singing seriously and sang - Bert Lloyd commented on this when Walter was taken to America foir the Bi-Centennial celebrations
He seldom even drank while performing
There are examples of him on film
If you regard fol song as a thing of the past - why involve yourself in it
You must hate Shakespeare
Jim