Titus Livius (Livy), The History of Rome, Book 40
William A. McDevitte, Sen. Class. Mod. Ex. Schol. A.B.T.C.D., Ed.

32. The Celtiberians in the rear of their own line first observed the flames, and the news spread quickly through the whole army, that the camp was lost, and was even then completely in a blaze, which filled them with dismay, while it gave fresh spirits to the Romans; [2] for now the shouts of victory raised by their friends struck their ear, and the enemies' camp appeared all on fire. [3] The Celtiberians hesitated for some time, uncertain how to act, but when they considered that, in case of a defeat, they had no place of refuge, and that their only hope now lay in their arms, they renewed the combat afresh, with greater obstinacy. [4] Their centre was pressed hard by the fifth legion; but their men advanced with more confidence against the left wing, where they saw that the Romans had posted the provincial auxiliaries, troops of their own kind. [5] The left wing of the Romans was now near being defeated, had not the seventh legion come to its support. At the same time, the troops left in garrison at Aebura came up during the heat of the battle, and Acilius closed on the enemy's rear. [6] Thus surrounded, the Celtiberians were, for a long time, cut off in great numbers, and at last the survivors betook themselves to flight in every direction. The cavalry, in two divisions, were sent in pursuit, and made great havoc. There were killed, of the enemy, on that day, twenty-three thousand, and four thousand seven hundred were taken, with more than five hundred horses, and eighty-eight military ensigns. [7] The victory was great, but not obtained without loss of blood. There fell, of the two Roman legions, a few more than two hundred men; of the Latin confederates, eight hundred and thirty; and of foreign auxiliaries, about two thousand four hundred. [8] The praetor led back his victorious troops to their tents: Acilius was ordered to remain in the camp which he had taken. Next day the spoils of the enemy were collected, and those whose bravery had been remarkable were presented with gifts in a public assembly.