The ground on which the allied commander had decided to accept battle was chosen with excellent judgment. In front of the position, the surface declined for nearly a quarter of a mile, and rose again for an equal distance, until it terminated in a ridge of easy access, along which the French had posted a number of their brigades, the intermediate space between the armies being covered by a rich crop of rye nearly ready for the sickle. In the rear, the forest of Soignies, intersected by the great roads from Charleroi to Brussels, extended; and nearly at the entrance to the wood, the little village of Waterloo was situated. The right of the British was stretched over to Merke Braine, and the left appuied upon a height above Ter le Haye. The whole line was formed on a gentle acclivity, the flanks partially defended by a small ravine with broken ground. The farmhouse of La Haye Sainte, in front of the left centre, was defended by a Hanoverian battalion, and the chateau of Hougomont, in advance of the right centre, held by a part of the Guards and a few companies of Nassau riflemen. This was the strongest point of the whole position; and the Duke had strengthened it considerably, by erecting barricades and perforating the walls with loopholes, to permit the musketry of its defenders to be effectively employed. Wellington’s first line, comprising some of his best regiments, was drawn up behind these posts; the second was still further in the rear, and, from occupying a hollow, was sheltered from the fire of the French artillery. The third was formed of the cavalry; and they were more retired still, extending to Ter le Haye. The extreme right of the British obliqued to Merke Braine, and covered the road to Nivelles, while the left kept the communication with the Prussians open by the Ohain road, which runs through the passes of Saint Lambert. As it was not improbable that Napoleon might endeavour to reach Brussels by marching circuitously round the British right, a corps of observation, composed of the greater portion of the fourth division, under Sir Charles Colville, was detached to Halle; and consequently those troops, during the long and bloody contest of the 18th, were at a distance from the field, and remained _non combattant_. The allied dispositions were completed soon after daylight, although it was nearly noon before the engagement seriously commenced. The division of Guards, under General Cooke, was posted on a rise immediately adjoining the chateau of Hougomont, its right leaning on the road to Nivelles; the division of Baron Alten had its left flank on the road of Charleroi, and was drawn up behind the house of La Haye Sainte. The Brunswick troops were partly in line with the Guards and partly held in reserve; and the Nassau troops were generally attached to Alten’s division. Some of the corps in line, and a battalion acting _en tirailleur_, occupied the wood of Hougomont. This _corps d’armée_ was commanded by the Prince of Orange.