Soult barred his path by a great entrenched camp at Bayonne, to which the Adour served as a Titanic wet ditch. The Adour is a great river, swift and broad--swiftest and broadest through the six miles of its course below the town to its mouth. Its bed is of shifting sand; the spring-tide rises in it fourteen feet, the ebb-tide runs seven miles an hour. Where the swift river and the great rollers of the Bay of Biscay meet is a treacherous bar--in heavy weather a mere tumult of leaping foam. Soult assumed that Wellington would cross the river above the town; the attempt to cross it near the mouth, where it was barred with sand, and beaten with surges, and guarded, too, by a tiny squadron of French gunboats, was never suspected. Yet exactly this was Wellington's plan; and his bridge across the Adour is declared by Napier to be a stupendous undertaking, which must always rank amongst "the prodigies of war." Forty large sailing-boats, of about twenty tons burden each, carrying the materials for the bridge, were to enter the mouth of the Adour at the moment when Hope, with part of Hill's division, made his appearance on the left bank of the river, with materials for rafts, by means of which sufficient troops could be thrown across the Adour to capture a battery which commanded its entrance. On the night of February 22, Hope, with the first division, was in the assigned position on the banks of the Adour, hidden behind some sandhills. But a furious gale made the bar impassable, and not a boat was in sight. Hope, the most daring of men, never hesitated; he would cross the river without the aid of the fleet. His guns were suddenly uncovered, the tiny French flotilla was sunk or scattered, and a pontoon or raft, carrying sixty men of the Guards, pushed out from the British bank. A strong French picket held the other shore; but, bewildered and ill led, they made no opposition. A hawser was dragged across the stream, and pontoons, each carrying fifteen men, were in quick succession pulled across. When about a thousand men had in this way reached the French bank, some French battalions made their appearance. Colonel Stopford, who was in command, allowed the French to come on--their drums beating the _pas de charge_, and their officers waving their swords--to within a distance of twenty yards, and then opened upon them with his rocket brigade. The fiery flight and terrifying sound of these missiles put the French to instant rout. All night the British continued to cross, and on the morning of the 24th the flotilla was off the bar, the boats of the men-of-war leading.