Dermot in retaliation took O'Malley's Island, upon which Hugh went in pursuit of Dermot; and a battle was fought between them, in which Hugh O'Malley, Lord of Umallia, was slain by Dermot and his son Conor, and also the son of Thomas O'Malley, and Donnell, the son of Dermot O'Malley.
Dermot dalam pembalasannya mengambil pulau o'malley, di mana Hugh pergi untuk mengejar Dermot; dan pertempuran pun terjadi antara mereka, di mana Hugh o'malley, Bangsawan Umallia, dibunuh oleh Dermot dan anaknya Conor, dan juga putra dari Thomas o'malley, dan Donnell, anak Dermot O Malley.