Inevitably from Mainly Norfolk - thank you, Reinhard!¬

From Puck to Appleby. Jim Carroll and Pat Mackenzie commented in the latter's booklet:

"We have not found this song elsewhere, either in print or in a recording, but it bears such a striking resemblance to Mrs Elizabeth Cronin's What Would You Do If You Married a Soldier (Roud 3051) that it is probably a traveller's remake of the same song.

"Mary has a number of similar pieces: I've Buried Three Husbands Already and If Ever You Go to Kilkenny, etc., and, despite the fact that her speciality is the long, free ballad, she takes great pleasure in singing these made-up snatches and often is not able to finish them for laughing."

Personally, I wouldn't analyse the words too deeply.