Soult prolonged his line to the confluence of the Bidouse below Guiche, and established his head-quarters at Peyrehorade, at the junction of the Gave de Pau with the Gave d’Oleron. The right of the French army was commanded by Count Reille, the left by Clausel, the centre by D’Erlon, and a division at St. Jean Pied de Port by Harispe.

Six weeks passed on. The weather was too inclement to allow movements to be made on either side—and the French marshal was occupied in defending his extensive lines, and the allied general in preparing secretly for passing the Adour.[266]

In February the weather changed—the cross roads became practicable—and Lord Wellington with his characteristic promptness, commenced preparatory movements for the execution of his grand conception.

To distract the attention of Soult from the defence of the Adour, Wellington threatened the French left on the Bidouse, and directed Hill’s corps against that of Harispe. The latter, leaving St. Jean Pied de Port garrisoned, fell back on Hellete; retiring subsequently on the heights of La Montagne, and next day uniting with another corps. Thus strengthened, Harispe formed in order of battle on a very strong position to the right of Garris.

The road, however, communicating with the bridge of St. Palais was uncovered—and though evening had come on, and the second division, with a Spanish corps under Morillo, were alone in hand, Lord Wellington determined to force the position. The Spaniards were desired to march rapidly on St. Palais, while, with Stewart’s division, the heights should be carried. The attack was gallantly made, the enemy offered a brave resistance,—but the position was stormed in fine style, and held against every effort the French could make for its recovery. The contest continued until darkness had shrouded distant objects, while the battalions still fought with such furious obstinacy, that volleys were interchanged within pistol range, and the bayonet frequently resorted to. Finding it impossible to force those enduring troops from the ground they seemed determined upon keeping, Harispe, before Morillo could seize the bridge, succeeded in retiring his beaten corps. Falling back upon the Gave de Mauleon, he destroyed the bridge of Navarette; but the river was forded by the British, Harispe’s position forced, and his division driven behind Gave d’Oleron.

Soult instantly destroyed the communications, and rendered the bridges over the Adour impassable. The centre of the allies being now in force on the Bidouse, and concentrating on Sauveterre, the French marshal retired from Bayonne, leaving a powerful garrison behind him for the protection of that important city.

All necessary preparations for the passage of the Adour had been completed, and from the co-operation of the British navy much assistance was expected. That hope was fully realized; and the noble exertions of the English sailors on the eastern coast of Spain, at St. Sebastian, and at Passages, were crowned by the intrepidity with which the bar of the Adour was crossed. Undaunted by the failure of the leading vessels, which perished in the surf—with death before their eyes, and their comrades swamping in the waters—on came the succeeding chasse-marées.[267] At last the true channel was discovered. Vessel succeeded vessel,—and before night a perfect bridge was established over the Adour, able from its solidity to resist a river current, and protected from any effort of the enemy by a line of booms and spars, which stretched across the river as a security against fire ships, or any other means which the French might employ for its destruction[268]

Before the flotilla had entered the Adour, or the pontoons had arrived from Bedart, the guards attempted a passage of the river by means of the small boats and a temporary raft formed of a few pontoons, and worked as a flying bridge, by means of a hawser extended from the opposite bank. As the strength of the tide interrupted this precarious mode of passage, when only six companies, with two of the 60th rifles, and a party of the rocket corps, had crossed, the position of this small body, isolated as it was, and open to the attack of overwhelming numbers, was dangerous in the extreme.[269] Colonel Stopford, however, made the best dispositions in his power for defence, and formed with one flank upon the river, and the other appuied upon a morass, while the heavy guns that had been placed in battery on the other shore, swept the ground in front of the position with their fire. As had been truly apprehended, an attack was made. The French advanced with fifteen hundred men, and the guards and rifles received them steadily—the rocket corps, on either flank, opening with this novel and destructive projectile.[270] A few discharges completely arrested the enemy’s advance, and they hastily retired from the attack; while at the turning of the tide, reinforcements were ferried over, and the position secured until the following evening, when the whole of the first division, with two guns and a few troops of dragoons, succeeded in effecting a passage.

Bayonne, in the mean time, was closely invested, and the garrison forced back from the villages in front of their lines, by Sir John Hope.[271] Lord Wellington, having secured the attention of Soult by a formidable demonstration on his front, enabled Sir Rowland Hill to pass the Gave de Oleron unopposed, and thus turn the left flank of the French marshal. Soult instantly retired and took a position behind the Pau, establishing his head-quarters at Orthez. Picton, with the third and light divisions, had followed Hill; Clinton, with the sixth, had crossed between Laas and Montford; and Beresford observed the enemy at Peyrehorade closely, and kept them within their intrenchments.

Lord Wellington had decided on an immediate attack. The French were very strongly posted—their left wing, commanded by Clausel, rested on the Gave, and occupied the town of Orthez; the centre, under d’Erlon, was formed on the heights in the rear; while the right wing extended behind St. Boes, and held that village. Harispe’s division was placed as a reserve in the rear, and crossed the great roads leading to Bordeaux and Toulouse.