According to the "Cogadh Gaedhil re Gallaibh", Sigtrygg's flight from the city took him north, first to the Ulaid and then to Aéd of Cenél nEógain. Both tribes refused to help him. As Sigtrygg could find no refuge in Ireland, he eventually returned, submitted to Brian, gave hostages and was restored to Dublin three months after Brian ended his occupation in February. In the meantime, Sigtrygg may have temporarily "turned pirate" and been responsible for a raid on St David's in Wales.