Picton quickly gained the Val de Zubiri, and threw his skirmishers against Foy’s left flank on the mountain, while on the other flank General Inglis, one of those veterans who purchase every step of promotion with their blood, advancing with only five hundred men of the seventh division, broke at one shock the two French regiments on the ridges covering Clausel’s right, and drove them down into the valley of Lanz. He lost indeed one-third of his own men, but instantly spread the remainder in skirmishing order along the descent and opened a biting fire upon the flank of Conroux’s division, which being in march up the valley from Sauroren, was now thrown into disorder by having two regiments thus suddenly tumbled upon it from the top of the mountain. Foy’s division was marching along the crest of the position between Zabaldica and Sauroren at the moment of this attack; but he was too far off to give aid, and his own light troops were engaged with Cole’s skirmishers; moreover Inglis had been so sudden that before the evil was well perceived it was past remedy; for Wellington instantly pushed the sixth division under Pakenham to the left of Sauroren, and sent Byng headlong down from the chapel height against Maucune, who was in that village. This vigorous assault was simultaneously enforced from the other side of the Lanz by Madden’s Portuguese, and the battery near the chapel sent its bullets crashing through the houses, or booming up the valley towards Conroux’s column, which Inglis never ceased to vex. The village and bridge of Sauroren and the straits beyond were soon covered with a pall of smoke, the musketry pealed frequent and loud, and the tumult and affray echoing from mountain to mountain filled all the valley. Byng with hard fighting carried Sauroren, fourteen hundred prisoners were made, and the two French divisions, being entirely broken, fled, partly up the valley towards Clausel’s other divisions, partly up the original position, to seek refuge with Foy, who remained on the summit a helpless spectator of this rout. He rallied the fugitives in great numbers, but had soon to look to himself, for his own skirmishers were now driven up the mountain by Cole’s men, and his left was infested by Picton’s detachments. Thus pressed, he fell back along the hills separating the valley of Zubiri from that of Lanz, and the woods enabled him to effect his retreat without much loss; yet he dared not descend into either valley, and thinking himself entirely cut off, sent advice to Soult and went over the Great Spine into the Alduides by the pass of Urtiaga. Clausel meanwhile had been driven up the valley of Lanz to Olague, where, being joined by La Martinière, he took a position; and Wellington, whose pursuit had been damped by hearing of Hill’s action, also halted.