From the sleeve note of 'The Watersons:'

This is one of the songs harmonised with sweet dignity by the Copper cousins, Ron and Bob, who live in Sussex and sing in parts the way their fathers sung before them.

The song is usually found as an anthem for the blacksmith, celebrating his strong arm and brawny body. But the Watersons found these lusty, bucolic words in the Hammond collection from Dorset. The blacksmith's blowpipes are transformed into a shepherd's bagpipes, the song is taken out of the smoky forge into the open air and it ends on a ribald laugh rather than a 'health to the king'.

D'Urfey's PILLS TO PURGE MELANCHOLY of 1719 contains a song about the tribulations of a rich farmer called Roger Twangdillo. There may be a connection. Or there may not!