He refused all Lewellyn's demands, except that of a safe-conduct; sent him repeated summons to perform the duty of a vassal; levied an army to reduce him to obedience; obtained a new aid of a fifteenth from parliament; and marched out with certain assurance of success against the enemy.
{1277.} Besides the great disproportion of force between the kingdom and the principality, the circumstances of the two states were entirely reversed; and the same intestine dissensions which had formerly weakened England, now prevailed in Wales, and had even taken place in the reigning family.

David and Roderic, brothers to Lewellyn, dispossessed of their inheritance by that prince, had been obliged to have recourse to the protection of Edward, and they seconded with all their interest, which was extensive, his attempts to enslave their native country.

The Welsh prince had no resource but in the inaccessible situation of his mountains, which had hitherto, through many ages, defended his forefathers against all attempts of the Saxon and Norman conquerors; and he retired among the hills of Snowdun, resolute to defend himself to the last extremity.

But Edward, equally vigorous and cautious, entering by the north with a formidable army, pierced into the heart of the country; and having carefully explored every road before him, and secured every pass behind him, approached the Welsh army in its last retreat.

He here avoided the putting to trial the valor of a nation proud of its ancient independence, and inflamed with animosity against its hereditary enemies; and he trusted to the slow, but sure effects of famine, for reducing that people to subjection.