Early in the day Mitchell had advanced several companies, for the purpose of closing the gap between Hougoumont and Braine la Leud, and one company of the 51st was posted close to an abatis which had been placed across the main road a little in rear of the entrance to the avenue of Hougoumont. Four other companies of the regiment were extended farther to the right, along the hollow way leading to Braine la Leud, with instructions to engage the enemy's skirmishers as they advanced, and then to endeavour to harass with heavy musket fire the solid columns following their skirmishers. As had been expected, the French columns came on, covered by skirmishers, but so advantageous was the ground over which they advanced, and so high the standing corn through which they moved, that the companies of the 51st could not observe their approach until they were almost upon them. Then, rising, the British soldiers poured in their fire at forty paces, and, cheering wildly, dashed forward at the charge. And the impetuous onslaught had the desired effect, for the enemy, although supported by cavalry, were beaten back. The four companies of the 51st were then ordered to retire some two hundred yards, and rejoin the regiment. While this was in progress, Napoleon was busy making preparations for his grand assault, designed to break the left centre of the British position. For this great effort, seventy-four guns were moved up, so as to bring their fire to bear, at a range of less than half a mile, on the Allies; and Marshal Ney was placed in command of 18,000 men in four columns, supported by Kellerman's cavalry division. Napoleon hoped that this combined attack would be final and decisive; that, having captured the advanced post of La Haie Sainte, the columns would be able to sweep onwards to Mont St Jean, cut off Wellington from Brussels as well as from the Prussians coming from the direction of Wavre, and thus make victory complete. At 1 P.M. Ney's masses of columns moved down into the valley, and passed the seventy-four guns, which immediately opened fire over their heads, and caused havoc in the ranks of the Allies. Three of the columns pressed forward towards the Allies' centre, while the third moved away north-east, with the intention of driving in the left flank. Whether by design or by accident, Ney's principal attack was directed against the portion of the front line held by Bylandt's brigade of Dutch and Belgians, and no sooner did the French skirmishers, covering the advance of the columns, begin to make use of their muskets than panic seized their adversaries, who turned and fled in disorder. Then was Wellington's forethought, as well as the wisdom of his dispositions, apparent, for doubting the loyalty of the Dutch-Belgians, he had been careful to support them everywhere by British brigades, and here, close in rear, stood Picton's division, ready to take the place of the disloyal or cowardly Dutch-Belgians.