Steve, I see that the first edition of "The Charmer" (1749) also contains the song - in four-line stanzas with interstanzaic folderols.

The second edition, however, prints it in eight-line stanzas, which makes it look like the folderols are merely intended to fill out the
final.

There is a "Twelfth [sic] Edition" of Ramsey published in Dublin "For George Risk" in *1740*, "With large Additions not printed in any former Impression." This song we're discussing is nonetheless lacking, as it is from editions 1 through 5, the only others I have found digitized and accessible.

So for now it looks as though Ramsey took it from the first ed. of "The Charmer."