Has anyone heard of the lyrics

Peggy in the garden making duff
and the cheeks of her a*** go chuff chuff chuff with you oxine
steady on your oars with your oxine
steady on your oars your oxine boys
beware your oxine boys

This is only the first verse of a long shanty style song that I heard many years ago in Wiltshire sang by an archeaologist called Falconer. I have not been able to find any hint of it across the internet when I have had a look.