At last a deliverer arose. According to the will of Olioll Olum, King of Munster in the third century--such is the theory--the sovereignty of Cashel, that is of Munster, was to belong alternately to the races of his two sons, Eoghan Mor and Cormac Cas. The Eoghanachts and Dal Cais are generally Anglicised as the Eugenians and Dalcassians; the strength of the former and much stronger tribe being in Cork, Limerick, and Kerry--that of the latter in Clare. The Eugenian Fergraidh was king in 967, when he was murdered by his own people. Mahon the Dalcassian then became king, in compliance with the constitutional theory, but not without a struggle. Urged on by his brother Brian, he attacked the Danish settlements up and down the country, and became master of Cashel, when Ivar, finding his supremacy threatened, summoned all that would obey him to root out utterly the whole Dalcassian race. [Sidenote: Molloy, Mahon, and Brian.] The tribes of Western Munster generally were disposed to follow Mahon, but Molloy, King of Desmond, and some others, adhered to the Dane rather than admit the supremacy of a local rival. A pitched battle took place at Solloghead, near Tipperary, in which the foreigners and their allies were totally defeated. Molloy and other chiefs who had taken the losing side were forced to give hostages to the victor. Mahon burned Limerick and drove away Ivar, who returned after a year with a great fleet, and fixed his head-quarters on Scattery Island, where St. Senanus had so sternly resisted the blandishments of a female saint. [Sidenote: Murder of Mahon. Brian succeeds him.]