LEN CHANDLER.
...we'd go to Washington Square Park... and it was there that I started seeing people like Dave Van Ronk and other folksingers... After I failed to get a teaching certificate... Hugh Romney... asked me to play with him at the Gaslight. It was mainly a scene for poets...
The whole Village scene was very heavy, and there were people like Noel Stookey, who was doing sound effects like the sound of a flushing toilet, and singing folk songs, and eventually, songs that he wrote...
By 1962, the civil rights movement was under way, and I wrote my first topical song about a bus accident that happened in Greeley, Colorado...
Bob Dylan (by his own admission) used the tune of the aforementioned Len Chandler song for his song "The Death of Emmett Till". The tune itself (IMO) is basically a variant of that used in Dylan's (and Dave Van Ronk's) version of "House of the Risin' Sun".
Len Chandler is also a possible and likely source for Dylan's version of "Gospel Plow".