What startles me about the tune is how adaptable it is. Sinnce it is first listed as [from memory this - a New Northern Song]I prefer to think of it,with absolutely no suppporting evidence, as a Scots tune. I also recall reading that up till around 100 years ago it was a lively jig. Third, if you retread the tune to become major rather than minor mode it turns into a family relative of a popular Scots kids ring game tune with a tangled pedigree - Who'll Come In Tae Ma Wee Ring / Bee Baw Babbity.