To turn the position, by advancing Hill’s corps through St. Jean Pied-de-Port, was first determined on; but, on consideration, this plan of operations was abandoned, and, strong as the centre was, the allied leader resolved that on it his attack should be directed, while the heights of Ainhoue, which formed its support, should, if possible, be simultaneously carried.

A commander less nerved than Lord Wellington, would have lacked resolution for this bold and masterly operation. Everything was against him, and every chance favoured the enemy. The weather was dreadful, the rain fell in torrents, and while no army could move, the French had the advantage of the delay to complete the defences of a position which was already deemed perfect as art and nature could render it. Nor did their powerful works produce in the enemy a false security. Aware of the man and the troops which threatened them, they were always ready for an attack, and their outpost duty was rigidly attended to. Before day their corps were under arms, and the whole line of defence continued fully garrisoned until night permitted the troops to be withdrawn.

At last the weather moderated. Ainhoue was reconnoitred by Wellington in person, and the plan of the attack arranged. No operation could be more plain or straightforward. The centre was to be carried by columns of divisions, and the right centre turned. To all the corps their respective points of attack were assigned, while to the light division and Longa’s Spaniards the storming of La Petite Rhune was confided. The latter were to be supported by Alten’s cavalry, three brigades of British artillery, and three mountain guns.

The successful result of the battle was owing in no inconsiderable degree to the able direction of the artillery under Colonel Dickson. Guns were brought to bear on the French fortifications from situations which they considered totally inaccessible to that arm. Mountain guns on swivel carriages, harnessed on the backs of mules purposely trained for that service, ascended the rugged ridges of the mountains, and showered destruction on the intrenchments below. The foot and horse-artillery displayed a facility of movement which must have astonished the French, the artillerymen dragging the guns with ropes up steep precipices, or lowering them down to positions from whence they could with more certain aim pour forth their fatal volleys against the enemy.

The 8th December had been named for the attack, but the roads were so dreadfully cut up, that neither the artillery nor Hill’s brigade could get into position, and it was postponed for two days longer, when the 10th dawned, a clear and moonlight morning. Long before day, Lord Wellington, and several of the generals of division and brigade with their respective staffs, had assembled in a small wood, five hundred yards from the redoubt above the village of Sarré, waiting for sufficient light to commence the arranged attack.

Nothing could exceed the courage and rapidity with which the troops rushed on, and overcame every artificial and natural obstacle. The 3rd and 7th advanced in front of the village, Downie’s Spanish brigade attacked the right, while the left was turned by Cole’s, and the whole of the first line of defences remained in possession of the allies.

On this glorious occasion, the light division was pre-eminently distinguished. By moonlight it moved from the greater La Rhune, and formed in a ravine which separates the bolder from the lesser height. This latter was occupied in force by the enemy, and covered on every assailable point with intrenchments. As morning broke, the British light troops rushed from the hollow which had concealed them. To withstand their assault was impossible; work after work was stormed; forward they went with irresistible bravery, and on the summit of the hill united themselves with Cole’s division, and then pushed on against the intrenched heights behind, which formed the strongest part of the position. Here, a momentary check arrested their progress; the supporting force (Spanish) were too slow, and the ground too rugged for the horse artillery to get over it at speed. The rifles were attacked in turn, and for a moment driven back by a mass of the enemy. But the reserve came up; and again the light troops rushed forward, the French gave way, and the whole of the lower ridge was left in possession of the assailants.

For four hours the combat had raged, and on every point the British were victorious. A more formidable position still remained behind, and Wellington combined his efforts for a vigorous and general attack.

This mountain position extended from Mondarin to Ascain, and a long valley, through which the Nivelle flows, traversed it; where the surface was unequal, the higher points were crowned with redoubts, and the spaces of leveller surface occupied by the French in line or column, as the nature of the ground best admitted. Men inclined to fight never had a field that offered so many advantages; and there were none, save the British leader and the splendid army he commanded, who would have ventured to assault equal numbers posted as the enemy were.

The dispositions were soon complete, the word was given, and in six columns, with a chain of skirmishers in front, the allies advanced to the attack.