In the morning the English, who had rallied when the pursuit had ceased, again advanced, hoping to find Wallace unprepared. They were now commanded by the Earl of Lancaster, and had received some reinforcements in the night. They passed over the scene of the previous day's battle, and at last came in sight of the Scotch army. Wallace at first advanced, and then, as if dismayed at their superior strength, retired to the point where, in order to reach them, the English would have to cross a portion of the bog. The surface was covered with moss and long grass, and the treacherous nature of the ground was unperceived by the English, who, filled with desire to wipe out their defeat of the preceding day, charged impetuously against the Scotch line. The movement was fatal, for as soon as they reached the treacherous ground their horses sunk to the saddle girths. The Scotch had dismounted on firmer ground behind, and now advanced to the attack, some working round the flanks of the morass, others crossing on tufts of grass, and so fell upon the struggling mass of English. The Earl of Westmoreland and many others of note were killed, and the Earl of Lancaster, with the remains of his force, at once retreated south and recrossed the Border.