It's already in the DT, with the same strange typo in the title, oddly enough:  THE MONYMUSTK LADS

The DT file names Ewan MacColl's Folk Songs and Ballads of Scotland as immediate source, but fails to mention that MacColl got it from John Ord's Bothy Songs and Ballads, changing Ord's title (Rural Courtship) for some reason. Presumably 'Silly Wizard' got the song from one or the other; from MacColl, I suppose, if the spelling mistake in the title has been copied independently by both the DT and our 'guest' from, respectively, his book and SW's sleevenotes.