Donnell O'Brien, Prince of Thomond, who had married a daughter of Dermod, had just rebelled against Roderic, and the former was but too willing to assist him in his attempt. Thus encouraged where he should have been treated with contempt, and hunted down with ignominy, his ambition became boundless. He played out the favourite game of traitors; and no doubt hoped, when he had consolidated his own power, that he could easily expel his foreign allies. Strongbow had not yet arrived, though the winds had been long enough "at east and easterly."[279] His appearance was still delayed. The fact was, that the Earl was in a critical position. Henry and his barons were never on the most amiable terms; and there were some very special reasons why Strongbow should prove no exception to the rule. The first member of the Earl's family who had settled in England, was Richard, son of the Norman Earl Brien, a direct descendant of Robert "the Devil," Duke of Normandy, father of William the Conqueror. In return for services at the battle of Hastings, and general assistance in conquering the Saxon, this family obtained a large grant of land in England, and took the title of Earl of Clare from one of their ninety-five lordships in Suffolk.[280] The Strongbow family appears to have inherited a passion for making raids on neighbouring lands, from their Viking ancestors. Strongbow's father had obtained his title of Earl of Pembroke, and his property in the present county of that name, from his successful marauding expedition in Wales, in 1138. But as he revolted against Stephen, his lands were seized by that king; and after his death, in 1148, his son succeeded to his very numerous titles, without any property commensurate thereto. Richard was not in favour with his royal master, who probably was jealous of the Earl, despite his poverty; but as Strongbow did not wish to lose the little he had in England, or the chance of obtaining more in Ireland, he proceeded at once to the court, then held in Normandy, and asked permission for his new enterprise. Henry's reply was so carefully worded, he could declare afterwards that he either had or had not given the permission, whichever version of the interview might eventually prove most convenient to the royal interests. Strongbow took the interpretation which suited his own views, and proceeded to the scene of action with as little delay as possible. He arrived in Ireland, according to the most generally received account, on the vigil of St. Bartholomew, A.D. 1170, and landed at Dundonnell, near Waterford. His uncle, Hervey de Montmarisco, had already arrived, and established himself in a temporary fort, where he had been attacked by the brave citizens of Wexford. But the besieged maintained their position, killed five hundred men, and made prisoners of seventy of the principal citizens of Waterford. Large sums of money were offered for their ransom, but in vain. They were brutally murdered