Their only hope now was the bridge of Najera, over the Najerilla, which stream lay behind their line. Some rushed for the bridge, others leaped into the river, which became instantly red with blood, for the arrows of the archers were poured into the crowded stream. Only the approach of night, the fatigue of the victors, and the temptation to plunder the town and the camp saved the wreck of the Castilian army, which had lost seven thousand foot-soldiers and some six hundred men-at-arms. Du Guesclin’s battalion, which alone had made a gallant stand, was half slain. A large number of prisoners were taken, among them the valorous Du Guesclin himself. Edward the Black Prince now first learned the character of the man whom he had come to aid. Don Pedro galloped excitedly over the plain seeking his rival, and, chancing to meet Lopez de Orozco, one of his former friends, now the prisoner of a Gascon knight, he stabbed him to the heart, despite the efforts of the Gascon in his defence. The report of this murder filled the Black Prince with indignation, which was heightened when Don Pedro offered to ransom all the Castilian prisoners, plainly indicating that he intended to murder them. Prince Edward sternly refused, only consenting to deliver up certain nobles who had been declared traitors before the revolution. These Don Pedro immediately had beheaded before his tent. The breach between the allies rapidly widened, Don Pedro, as soon as he fairly got possession of the throne, breaking all his engagements with the Black Prince, while he was unable, from the empty state of his treasury, to pay the allied troops. Four months Prince Edward waited, with growing indignation, for redress, while disease was rapidly carrying off his men, and then marched in anger from Spain with scarcely a fifth of the proud array with which he had won the battle of Najera. The restored king soon justified his title of Peter the Cruel by a series of sanguinary executions, murdering all of the adherents of his rival on whom he could lay his hands. In this thirst for revenge not even women escaped, and at length he committed an act which aroused the indignation of the whole kingdom. Don Alfonso de Guzman had refused to follow the king into exile. He now kept out of his reach, but his mother, Doña Urraca de Osorio, fell into the hands of the monster, and was punished for being the mother of a rebel by being burned alive on the ramparts of Seville.