The Opies reported in their classic The Lore And Language Of Schoolchildren that Welsh schoolchildren from whom Iona went collecting tended only to sing one set of words to this tune. They relate the story of a visiting band to a concert for Welsh children, playing it as a compliment to their hosts & audience, being astonished when the children immediately joined in as with a single voice:

I'm the man who came from Scotland
Shooting peas up a nanny-goat's bottom...
I'm the man who came from Scotland
Shooting peas away!

≈M≈