Sorry--forgot to mention the Bud & Travis recording is the "Golden Apples of the Sun" title, I think--your discussion of the Judy Collins song is what made me think of it. She may have gotten from Will Holt, and Bud & Travis may have gotten it from his as well. They also played in those old days at the Gate of Horn. At any rate, they would have been well known at the time in the Chicago folk community.