I did a bit of research on Dave April before last, to produce one of a series of short radio spots on musicians who had died the previous year. I came across a story about this song; I'm afraid I can't find it right now, or remember as well as I would like.

I'll keep looking for something more specific; I'm at home right now, and the research material is on my machine at work. In the meanwhile, here's a link to the Dave Van Ronk Unauthorized home page, from which you can jump to just about everything on the internet about Dave:

Dave Van Ronk Unauthorized