hastily collected Welsh levies, unused to regular battle and very lightly armed, had no chance.
Again, the Norman never receded. He was willing to stop occasionally, in order to bide his time; but he clung tenaciously to every mile he had won. His skill as a castle builder was as striking as his prowess in battle or his cautious wisdom in council. He took possession of an old fortified post, or hastily constructed one of turf and timber; but he soon turned it into a castle of stone. At that time the Welsh had no knowledge of sieges; and their impetuous valour was of no use against the new castles.
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
