Minor point. The database Early English Books Online dates the Brooksby [sic] et al. broadside (Child's Ba) more specifically to "1688-1692."

To this text (with a couple of trivial differences) an otherwise unidentified ca1750 printing adds as final:


As she was lying down to die,
A sad feud she fell in;
She said, I pray take warning by
Hardhearted Barbara Allen.


I can't account for the word "feud."