Intriguing!
I also am interested in this ballad. There are lots of anomalies we need to look into. We perhaps need to slow down on this one rather than hurrying through, and try to come to some useful conclusions or at least list the probabilities and possibilities.

The most pressing is perhaps to ascertain if there ever was an English broadside.

If indeed the broadside existed in the Wood Collection then the Bodleian will surely have a record of it, unless the Bodl acquired the collection after the broadside went missing.

Someone needs to check the full Stationers Register to see if it was actually registered to Francis Grove. I only have the abridged Rollins book and it's not in there.