There was a layman, a monachus of Saint Fintán, named Máel Mairc, who, in the service of Cellach son of Dímma, slayed Áed Sláne. This layman was held captive by Crundmáel on the island of Liacc hAin. Then Fintán said:
‘Go and free your monachus Máel Mairc, who is in danger’.
Five holy clerics from among his monachi stood upon the port of the island of Liacc hAin; and the king knew that it was the familia of Fintán. And king Crundmáel said: ‘Take the captive man in a boat over the sea and slay him there before the clerics arrive’.
When they had led him over the sea for a little while, the boat stood in one place and it could not be moved one way or the other, and the hands of the men withered around their weapons, and thus in the middle of the day they stood fixed without motion. Then the king did penance and released the man to the clerics.