light.  The valley, which was confined, as has been before stated, would not contain all their forces.  About two-thirds of their foot and all their cavalry came down to the engagement.  The remainder of their infantry they stationed on the declivity of the hill.  Scipio, conceiving that the confined nature of the ground would be in his favour, both because the Roman troops were better adapted for fighting in a contracted space than the Spanish, and also because the enemy had come down and formed their line on ground which would not contain all their forces, applied his mind to a new expedient.  For he considered that he could not himself cover his flanks with his cavalry, and that those of the enemy which they had led out, together with their infantry, would be unable to act.  Accordingly he ordered Laelius to lead the cavalry round by the hills as secretly as possible, and separate, as far as he could, the fight between the cavalry from that between the infantry.  He himself drew up the whole body of his infantry against the enemy, placing four cohorts in front, because he could not extend his line further.  He commenced the battle without delay, in order that the contest itself might divert the attention of the enemy, and prevent their observing the cavalry which were passing along the hills.  Nor were they aware that they had come round before they beard the noise occasioned by the engagement of the cavalry in their rear.  Thus there were two battles; two lines of infantry and two bodies of horse being engaged within the space occupied by the plain lengthwise; and that because it was too narrow to admit of both descriptions of force being engaged in the same lines.  When the Spanish infantry could not assist their cavalry, nor their cavalry the infantry, and the infantry, which had rashly engaged in the plain, relying on the assistance of the cavalry, were being cut to pieces, the cavalry themselves also, being surrounded and unable to stand the shock of the enemy’s infantry in front, (for by this time their own infantry were completely overthrown,) nor of the cavalry in their rear, after having formed themselves into a circle and defended themselves for a long time, their horses standing still, were all slain to a man.  Nor did one person, horse or foot, survive of those who were engaged in the valley.  The third part, which stood upon the hill rather to view the contest in security than to take any part of it upon themselves, had both time and space to fly; among whom the princes themselves also fled, having escaped during the confusion, before the army was entirely surrounded.