Can't help you with your question, but I can give you another version of the song.
The Jolly Tinker
A comely dame of Islington had got leaky copper. The hole that made the liquor run was wanting of a stopper. A jolly tinker undertook and promised her most fairly With a thump, thump, thump and a knick, knack, knock to do her business rarely.
He turned the vessel to the ground. Said he, "A good old copper, But it well may leak for I have found a hole in it that's a whopper. But never doubt a tinker's stroke but though he's black and surly. With a thump, thump, thump and a knick, knack, knock he'll do your business rarely.
This man of mettle opened wide his budget's mouth to please her. Says he, "This tool I've oft employed about such jobs as these are." With that the jolly tinker took his stroke or two most kindly. With a thump, thump, thump and a knick, knack, he did her business finely.
As soon as he had done the feat, he cried, " 'Tis very hot-o. This thrifty labor makes me sweat. Give me a cooling pot-o." Says she, "Bestow the other stroke before you take your farewell. With a thump, thump, thump and a knick, knack, knock and you may drink a barrel."
Don't know anything about this one either.
Note: Ed McCurdy sings these exact lyrics on the CD compilation called When Dalliance Was in Flower (and maidens lost their heads). -Joe Offer-