The main body of the French army continued its retreat during the night, and was joined at Hagetman by the garrison of Dax, and by two fresh battalions of conscripts; it then halted behind the Adour, near St. Sever, to re-organize itself: the allies followed them to St. Sever on the day after the battle, and the centre advanced in three columns with the hope of enveloping them. That which marched on the _chaussée_ arrived at the appointed moment; but the flank columns ♦MARCH 1.♦ could not proceed upon the unpaved roads at the pace which was required; and thus the enemy had time to move off in the direction of Agen, escaping an attack which they were in no condition to have withstood. Beresford then with the light division, and with Colonel Vivian’s brigade, passed the Higher Adour, and occupied Mont de Marsan, the principal town in the department of the Landes, where he took a very large ♦THE FRENCH DRIVEN FROM AIRE.♦ magazine of provisions. Here no resistance was attempted; but at Aire, where the enemy had other magazines, a corps was collected with the intention of making a stand to protect their removal. Against this place, which is on the left bank of the Adour, Sir Rowland moved upon the 2nd of March; and when his advanced guard arrived within two miles of the town, the French were discovered strongly posted on a ridge of hills, with their right upon the river, thus covering the approach. Notwithstanding the strength of the post, Sir William Stewart was ordered to attack them with the second division along the road, and Brigadier-General Da Costa’s Portugueze brigade about the centre of their position. The French force consisted of two divisions; and the Portugueze, when they forced their way up and gained the summit, found, which had not been expected, an extent of flat ground on the top, and a strong body of the enemy completely formed there to resist them; the Portugueze were so broken and confused that they could regain no formation, and must have suffered accordingly, if Sir William Stewart, having beaten back the enemy on his side, had not dispatched his first brigade under Major-General Barnes to their timely support. The enemy were then in their turn thrown into confusion by a vigorous charge, nor could they after many attempts recover the ground, but were driven from all their positions, and finally from the town, where the magazines fell into the conqueror’s hands. Two divisions of the French were engaged in this affair, one of them was Harispe’s, which had not been at Orthes; their loss was very considerable: that of the allies amounted to 20 killed and 135 wounded; among the former was the Honourable Lieutenant-Colonel Hood, of the general staff, an officer of great merit and promise.