Again, the Welsh opposition was not only not organised, but weakened by internal strife. While the Norman was winning valley after valley, the Welsh princes were trying to decide by the issue of battle who was to be chief. Bleddyn was slain in 1075; and his nephews and cousins tried to rule the country. Among these, Trahaiarn was a soldier of ability and energy, and a ruler of real genius. But he was the rival of the exiled princes of the House of Cunedda, and he found it difficult to bend Snowdon and the Vale of Towy to his will. Two of the exiles met him, probably near some of the cairns in the valley of the Teivy; and there, in the battle of Mynydd Carn, fiercely fought through the dusk into a moonlight night in 1079, Trahaiarn fell. It looked as if no leader could rise in Wales to fight a Norman army or to take a Norman castle. VIII GRIFFITH AP CONAN AND GRIFFITH AP REES IN the battle of Mynydd Carn, a young chief led the shining shields of the men of Gwynedd. He was Griffith, the son of a prince of the line of Cunedda and of a sea-rover’s daughter. He was mighty of limb, fair and straight to see, with the blue eyes and flaxen hair of the ruling Celt. In battle, he was full of fury and passion; in peace, he was just and wise. His people saw at first that he could fight a battle; then they found he could rule a country. And it was he that was to say to the Norman: “Thus far shalt thou come, and no further.” When Bleddyn died in 1075, Griffith came to Gwynedd, and found that his father’s lands were under new rulers. Robert of Rhuddlan and Trahaiarn of Arwystli were mighty foes; but Griffith drove both of them back; and, by his prowess and success in battle, broke the spell of conquest which kept Gwynedd in bonds. But his enemies attacked him again from all sides; and, while Hugh the Wolf and Robert of Rhuddlan were laying Gwynedd waste, Trahaiarn and Griffith met at the hard-fought battle of Bron yr Erw. Griffith lost the day, and again became a sea-rover. He sailed to Dyved, and there he met Rees, the King of Deheubarth, who also was of the line of Cunedda, and had been driven from his land by the Normans. The two chiefs joined, and they crushed Trahaiarn at Mynydd Carn. Then they turned against the Normans. Rees soon fell in battle, and left two children, Nest and Griffith. The beauty of Nest and the genius of Rees ap Griffith fill an important page in the history of their country. Nest became the mother of the conquerors of Ireland; Rees became the greatest of all the kings of South Wales. The Normans found that the Welsh had taken heart. Of their opponents, they feared three: Griffith ap Conan, Owen of Powys, and Griffith ap Rees. The kings of England, the two sons of the Conqueror—red, brutal William and cool, treacherous Henry—had to come to help their barons.