The British, so alert at surprising their enemies, were themselves, on many occasions, liable to surprise. Their men were undisciplined, and sometimes negligent of the patient duties of the sentinel; and, besides, their foragers and flying parties, who scoured the country during the preceding day, had brought back tidings which had lulled them into fatal security. Their camp had been therefore carelessly guarded, and confident in the smallness of the garrison, they had altogether neglected the important military duty of establishing patrols and outposts at a proper distance from their main body. Thus the cavalry of the Lords Marchers, notwithstanding the noise which accompanied their advance, had approached very near the British camp without exciting the least alarm. But while they were arranging their forces into separate columns, in order to commence the assault, a loud and increasing clamour among the Welsh announced that they were at length aware of their danger. The shrill and discordant cries by which they endeavoured to assemble their men, each under the banner of his chief, resounded from their leaguer. But these rallying shouts were soon converted into screams, and clamours of horror and dismay, when the thundering charge of the barbed horses and heavily armed cavalry of the Anglo-Normans surprised their undefended camp. Yet not even under circumstances so adverse did the descendants of the ancient Britons renounce their defence, or forfeit their old hereditary privilege, to be called the bravest of mankind. Their cries of defiance and resistance were heard resounding above the groans of the wounded, the shouts of the triumphant assailants, and the universal tumult of the night-battle. It was not until the morning light began to peep forth, that the slaughter or dispersion of Gwenwyn's forces was complete, and that the "earthquake voice of victory" arose in uncontrolled and unmingled energy of exultation.