Thanks, Masato. The stanza from the Cantus (1666) has some lines that appear in the Quiller-Couch version, Oxford Book of Ballads.
Joe, the melody is in Sandys, and is on midi at Cyberhymnal. I have never heard the tune to "Greensleeves" used.
Try I Saw Three Ships for the tune. The Cyberhymnal has the version in the DT, except that in the last verse.
The DT errs by using "I sing: rather than "Amain." (Now that I think about it, I have always heard "I sing" and never "amain.")