It is mentioned in a biography on Brendan ,I can't remember which one, that after the first night of his play, "The Quare Fellow", he insisted on paying royalties to the composer of the Aul Trangle, I think the name was Shanahan. It is not clear whether he actually paid for the rights to the song or whether himself or Dominic added additional verses. If you are mentioning the death of "Rosie", Dominic's father in the play, you should include "The Sodding", which Dominic wrote as a tribute to his Da