Just an anecdote to this.
Ewan MacColl wrote this song for a TV play.
It has since been recorded and performed by many artists, each of whom seems to have altered the verses to "personalise" their own version.
As a result, many of the "lyrics" found on the net reflect these various changes as well as mis-hearings of recorded work.
In any event, it is a beautiful tune and all the various lyric versions I have come across manage to evoke the emotions (I believe) Ewan was aiming for.
Play and sing whichever version you like, or do as others have done and "personalise" your own version.
I will be a bit controversial and state my belief that Folk Music should be a living and evolving thing, too much emphasis on detailed accuracy of originality and correctness stifles our art. Play songs your own way and enjoy yourself, let your own emotions show through the music and the songs will spring to life and sound much better. Those with ears will hear......