Dinger: The Fureys recorded I WILL LOVE YOU by Tom Paxton. Is that the song you had in mind?

I see the same song—or nearly the same song—at least they have a lot of lines in common—has been posted under several titles:

EV'RY TIME (WHEN WE ARE GONE) (Tom Paxton) – lyrics and chords
I WILL LOVE YOU (Tom Paxton) – lyrics only.
EVERY TIME (Tom Paxton) – lyrics only.
EV'RY TIME (Tom Paxton) – lyrics and chords.

I would love to know the history of this song. Did Paxton himself change the words (that is, did he record more than one version) or did the Fureys change them? Are all the above transcriptions accurate, and correctly attributed to a particular recording? Or do the lyrics vary only because people posted them using their own faulty memories?