 With the collapse of the Norse-Gaelic kingdom, Ascall and the Dublin elite were forced to flee into what one source calls the "northern islands", a reference to either the Kingdom of the Isles or the Earldom of Orkney.About a year later, not long after Mac Murchada's death, Ascall attempted to regain his patrimony from the English.Unfortunately for himself, his invasion of Dublin ended in utter failure, and he was executed by the English governor of the town.