Here goes the long-shot question of the year:
About 1972, this guy performed at a little coffeehouse in Chicago.(The Broken Wall). He appeared under the name Jonathan Pearthree. I was told he was a well known figure on at least the local folk scene, who wouldn't appear under his real name because we couldn't pay scale;
I never got around to asking the staff member who booked him who he really was. Is there any soul left alive who might actually have a clue?