Dear Janie and MGM·Lion, thanks for your help and information. It's very useful.

I came across Salli Terri's version in my researches too, and this appears to be the same tune as the version I heard sung by a male American tenor... the recording I heard was taken off an old LP and was perhaps from the late sixties or early seventies, judging by the recording quality and the style... it wasn't sung in traditional Sacred Harp style, nor in Jimerson's more 'classical' tenor style - I was using the term 'tenor' more to denote the range of the voice, which in the recording I'm trying to find is a lot 'folkier'... in fact, it put me in mind of Ewan McColl, oddly, although it's clearly American (perhaps New England???).

Thanks again.