Junot quitted his position on the evening of the 20th, and marched all night by roads bad in themselves, and interrupted by numerous defiles; consequently great delay occurred, and it was seven o’clock next morning, when he arrived within four miles of the British outposts. The formation of his columns was effected unseen, as the broken ground behind which he made his dispositions, entirely concealed his movements. The first intimation of a serious attack was only given, when a mass of Junot’s cavalry deployed in front of the picket that was observing the Lourinho road. Perceiving instantly the point on which the French were about to direct their column, Sir Arthur crossed the ravine with the brigades of Ferguson, Nightingale, Aucland, and Bowes, thus securing his weakest point--the left--before Junot had made a demonstration against it. Presently the enemy’s columns came on; the right by the Lourinho road, and left marching on the plateau, occupied by the 50th and rifles. The onset of both divisions was made with the usual impetuosity of Frenchmen, and in both the British skirmishers were driven in. The British right was furiously attacked. Unchecked by the light troops covering the line, the French came boldly forward, until it found itself directly in front of the 36th, 40th, and 71st. It deployed instantly--and several volleys of musketry were mutually returned, and at a distance so close as to render the effect murderous. But the fusilade was ended quickly; the 82nd and 29th pushed forward, and joined their comrades when pressed by an enormous superiority. “Charge!” was the order; and a cheer, “loud, regular, and appalling,” announced that England was coming on. The French stood manfully; but though they waited the onset, they could not withstand it. They were driven from the field--a vain attempt to rally, when the 71st and 82nd had flung themselves on the ground to recover breath, failed--and six guns were taken. The front rank of the French division was literally annihilated--it lay as it had fallen-- and told with what determination it had stood, and the desperation with which it had been assaulted.