Isles, Magnús was slain in Ulster in 1103, whereupon Sigurðr immediately repudiated his bride and returned to Norway. Although Ua Briain was able to regain control of Dublin, and still held considerable influence in the Isles, Magnús' death appears to have left a power vacuum in the region that he was unable to fill. In 1111, Domnall mac Taidc appears to have forcefully seized the kingship of the Isles. Although it is possible that he had backing from Ua Briain himself, there is evidence to suggest that made his move without Ua Briain's consent. Not long after this undertaking, Domnall appears to have been either forced from the Isles, or drawn back to Ireland in an attempt to capitalise on Ua Briain's failing health, only to be slain himself in 1115. The encroachment of competing Irish factions into the Isles may well have been as unpalatable to the English and Scots as the power vacuum left in the wake of Magnús' demise. Since the chronicle records that the subsequent reign of Óláfr lasted forty years, the latter's accession to the kingship appears to date to about 1112 or 1113, not long after Domnall launched his bid for the throne. In fact, the chronicle indicates that Óláfr spent his youth at the court of Henry I, King of England, and it appears that this restoration of the Crovan dynasty, in the person of Lǫgmaðr's youngest brother, was the work of the English king. Departure and death Late in 1095, Pope Urban II first proclaimed an armed pilgrimage, or penitential holy war, that led to the First Crusade of 1096–1102. Before the end of the year, tens of thousands of men, women, and children answered his call to re-establish Christian control of Jerusalem. The particular terminology employed by the Chronicle of Mann—that Lǫgmaðr departed the kingdom "marked with the sign of the Lord's cross"—suggests that he participated in a crusade. On the other hand, since the chronicle was compiled in the thirteenth century, during a period when the idea of a cross-bearing pilgrim was well established, it is possible that this depiction of Lǫgmaðr has been contaminated by anachronistic conceptions. There are many reasons why crusaders volunteered to "take the cross". One particular reason was the desire of repentance. Remorse for the cruelty that he had inflicted upon his own brother may well have played a part in Lǫgmaðr's decision. On the