Re the dates of 10A. Looking at the footnotes on p119 I would guess Child only had access to the second edition and so gave the date for that. He was meticulous to the point of obsession with such things.

My own version of 10 is pretty fluid. I sing it on the principle of Albert Lord's assertion that in less literate societies ballads were remade every time they were performed from knowledge of the plot and a bank of stock phrases etc. This is made a lot easier when there are lots of refrain lines and repetitions as in my version. I got the tune and refrains from a locally recorded version (JFSS) and took it from there.

Here's a typical first verse

There was an old man in the north country,
Hi down derry down down
there was an old man in the north country,
Valid we ought to be,
There was an old man in the north country,
And he had daughters one, two and three,
And I'll be true to my love if my love will be true to me.