Steve,

You're disagreeing with both Jamieson and Percy. This still doesn't answer the question of why stanza 4:

And as it befell on a high holidaye,
As many did more beside,
Lord Thomas he went to Fair Ellinor,
That should have been his bride.

is not found in tradition. If people were singing the broadside stanza 4 would show up in America. It's not found in North America. Its rarely found in the British Isles. Doesn't his show that the broadside was not sung - and that the traditional ballad was sung. And that the broadside author presented the traditional ballad but changed a verse.

Consider also that the ballad was in the Virgina colony probably at the time or before the broadside was printed. It was also in Boston very early though the Soper family.

There are no version of "Sweet Willie and Fair Annie" the proper title of Child 73 because Child focuses on the Scottish versions. Child D, reflected by the broadside has a very consistent tradition and a widespread one. Child D is much different that the Scottish versions - which are rare.

Richie