I think it was me who told Garry that.  The DT example was transcribed from Martin Carthy's recording; he at least partially re-wrote the text, and I don't think that the tune he used was one traditionally associated with it.  On this occasion, he didn't indicate in his sleevenotes what his sources were, so if you want that particular melody, you'll probably have to buy the record.  It's well worth it.