This song occupied a chapter of my thesis for the School of Scottish Studies a few years ago. I identified over 40 variants of the rhyme - each with substantial differences of narrative, not just a word or two - yet Mary Garvey's version is new to me. The probable [polite] original has been performed by our Balding Prince Charlie, who perhaps learned it from his Scots grannie. It goes back to the Boer War, although a dodgy claim has been made for an earlier origin in the Second Afghan War.