Credit where credit is due. It was Hyder E. Rollins in the notes to the song of Greensleeves in his reprint of 'A Handefull of Pleasant Delites' (1924?) that cited all the Stationers' Register entries relevant to Greensleeves and showed it was obviously not in the now lost earlier edition of The Handfull.. (under a different name) that established that Greensleeves was a new song in 1580, and the song and tune were unknown earlier.