Hi, Dave - I can't find any other recording of the song - just this Violets of Dawn recording by the John Denver iteration of the
Mitchell Trio. I can't read the fine print, but I gather they recorded it in 1966 or early 1967. The song is a great spoof of the Byrds' harmony (and lack of diction, which is why this song will be a bear to transcribe. Thank heaven Gerry did the hard part).

I think the songwriter was Fred Hellerman, a member of the Weavers. And Lee Hays was also one of the Weavers, which may be the source of your confusion. I don't know which "Carter" was the co-writer.

-Joe Offer-