Actually Jim, from comparing Behan with Dylan, I don't think Zimmmy owed him anything.   Copyright law allows for parody.   This new incident is a bit different because Dylan is "accused" of lifting lines.

Also, Behan used the tune of "One Morning in May".   He was beholding to another writer too.

Does anyone remember the story of "Blowin in the Wind"?   There was a rumor that Dylan did not write that one either. It turned out that a high school student by the name of Lorre Wyatt (who would go on to have his own career in folk music) had claimed that he wrote the song to impress his friends. The story snowballed.

Ron