It isn't actually by Patrick O'Shaughnessy, though the text was collated by him from a broadside issued by Pitts (copies at the Bodleian) and from a text noted by the Hammond brothers from Robert Barrett of Piddletown in Dorset (1905). The two variant tunes in Yellowbelly Ballads (1975, I 37-8) are from Joseph Taylor (recorded by Percy Grainger, 1906), who remembered only a few words of the song. O'Shaughnessy traces the "extraneous" verses to a song called (The) North Americay; copies of this can be seen at the Bodleian (as (The) North (of) America), in one case on the same page as a Gown of Green text.