I don't know when people suggest that Louis Killen 'put this together as a song', but I would be surprised if Ewan couldn't remember it in 1963. That's the first printed version I know - in the 'Ewan MacColl, Peggy Seeger Songbook', Oak Publications, New York. The copyright is to Stormking Music, 1962.

The words (apart from the omission of the introductory verse) are exactly as in the DT. The tune is also the same, except that it's in 3/4, which is how I hear it and have always sung it.

Phil