“I do not,” said Cool stoutly.
“Do you think that the proper conduct for a Fenian?” asked the King.
“Is it not the rule of the Fenians to help the weak who are oppressed?” asked Cool in answer.
“This maiden was not oppressed,” said the old chief. “She was my daughter and under my protection.”
“Any maiden is oppressed who is not allowed to love and be loved by the man of her choice,” said Cool. “If you had permitted anyone to seek her in marriage she would not have been taken from you by force.”
King Conn hated to decide. He did not wish to offend the leader of his army, nor could he afford to make an enemy of the old chief and lose his fealty. He finally decided that he could replace his leader more easily, so he ruled that Cool must give back the maiden.
Now Cool had been greatly in love with Murna when he took her from the castle, but having her for his wife had made her more dear to him. He decided that life would not be worth living without her. He defied Conn to take her from him.
The hermit killed Cool and took his head to Gaul
From Birth of Finn
With his beautiful bride and those Fenians who were more loyal to him than to the High King, Cool fled to the forest. There he defended himself and for some time kept at bay the forces of Conn.