 They plundered Ardbraccan, Donaghpatrick, Dulane, Glendalough, Kildare and Clonard all within the space of two years (890–891).But a son of Barith called Eolair was killed by the Uí Amalgada of Tír Amalgada (Tirawley in County Mayo).In 893 another conflict arose and the ruling dynasty in Dublin split into two factions, one led by Sitric and the other by a pretender called Sigfrith the Jarl ( or "Sigurðr").