Ah, I was forgetting verse 4. Kennedy's source is given as the 1949 Tanner BBC recording, which is the one on the Folktrax compilation you mentioned. There's no indication in the book that any interpolations have been made, but Kennedy quotes (notes, pp 335-6) a couple of verses from a text published by Frank Kidson (Traditional Tunes, 1891, 78-81): or, more precisely, he mis-quotes them, re-shaping them slightly so that they fit Tanner's tune. Perhaps the additional text was silently added from Kidson