Thanks, Jeremiah. I must have heard him sing it, since I had that album. But his version still doesn't sound familiar to me. And the Colours' version did sound familiar when I heard it on an old archived radio show, though I can't remember that group at all. Funny how the memory works.

I was guessing maybe Townes Van Zandt as the author, but couldn't find any reference to it. It turns out I wasn't too far off.