The engagement commenced by Godinot debouching from the wood, and making a feint on the left, while the main body of the French ascended the heights on the right of the Spaniards. On perceiving the true object of Soult’s attack, Beresford, who had vainly endeavoured, through an aide-de-camp, to persuade Blake to change his front, rode to the Spanish post, pointed out the heads of the advancing columns, and induced his ally to take up a new alignment. It was scarcely done until the French bore down upon the Spanish infantry; and though at first they were stoutly opposed, the battalions gradually began to yield ground; and, being farther forced back, Soult commenced deploying on the most commanding point of the position. A serious attack was to be dreaded; the French cavalry sweeping round the allies, threatened their rear, and Godinot’s column made fresh demonstrations of vigorously assailing the left. All this was most alarming; the Spanish line confusedly endeavouring to effect the difficult manœuvre of changing its front, while two-thirds of the French, in compact order of battle, were preparing to burst upon the disordered ranks, and insure their total destruction. The French guns had opened a furious cannonade, the infantry were firing volley after volley, the cavalry charging where the Spanish battalions seemed most disordered. Already their ranks were wavering, and Soult determined to complete the ruin he had begun, ordered up the reserve, and advanced all his batteries. At this perilous moment, when the day seemed lost, General Stewart pushed the leading brigade of the fourth division up the hill under Colonel Colborne, and it mounted by columns of companies. To form line on gaining the top, under a withering fire, was difficult; and while in the act of its being effected, a mist, accompanied by a heavy fall of rain, shut every object out from view, and enabled the whole of the light cavalry of Godinot’s division to sweep round the right flank, and gallop on the rear of the companies at the time they were in loose deployment. Half the brigade was cut to pieces--the 31st, who were still fortunately in column, alone escaping the lancers, who, with little resistance, were spearing right and left a body of men surprised on an open flat, and wanting the necessary formation which can alone enable infantry to resist a charge of horse. This scene of slaughter, by a partial dispersion of the smoke and fog that had hitherto concealed the battleground, was fortunately observed by General Lumley, and he ordered the British cavalry to gallop to the relief of the remnant of Colborne’s brigade. They charged boldly; and, in turn, the lancers were taken in rear, and many fell beneath the sabres of the British.