I'm sure Malcolm is right about the Minguley being a latecomer and non-traditional - though that wouldn't necessarily rule out a singer having introduced it that way, maybe on the basis of something she'd been told. Stories can transfer themselves from one song to another.

But as he says, this is all guesswork, since there are hundred of sings which could fit the requirements. We need madrept to come back and give us a clue.