This sounds rather similar to the version June Tabor sings . . I'd happily listen to that version to transcibe it for you . .

(June always claims she only sings it for the delight of the line:

"She rose and shot her FALSE WILLY"

though I'm not sure the pun exists in the US).

However I don't see where your problem is, Roberto - I would have thought you could have "filled in the gaps" in the version you have.

Also, I'm surprised you consider this to be a particularly good version; IMO the version (from memory):

She's sent for a brace of pistols
Which were brought at her command
Fired and shot her false lover
And the bride at his right hand

works much better than the last but one line of your extract.

Cheers!

George