When Blücher reached Ligny, with eighty thousand men, Napoleon met him, and a desperate battle ensued in which the Prussian general suffered terrible loss, but, still undefeated, retreated in good order on Wavre, so that he might join Wellington at Waterloo, according to a previous arrangement which he had made with Wellington. Napoleon thought that the Prussians were retreating on the Rhine, and detached thirty-three thousand men under Grouchy to hang on their rear. Grouchy missed the Prussians, and his troops took no part in the great battle. On the same day Ney, with twenty thousand men, appeared before Quatre Bras, where only ten thousand British and an equal force of Belgians had been able to assemble. The Belgians fled before the French cavalry, but the British infantry kept up a dogged resistance while corps after corps was hurried up. At the close of the day Ney saw that he was outnumbered, and withdrew, while Wellington retreated to the line of heights upon which we are now gazing. Napoleon now pushed on to measure swords with Wellington in person for the first time. On Sunday morning, the 18th of June, the two armies faced each other. As Napoleon looked across the valley and saw the British redcoats on the rising ground opposite, he cried, “I have them.” He had good reason to believe that he would win. His forces numbered between seventy and eighty thousand men, and he was superior both in guns and in cavalry to his foes. Wellington had about sixty-seven thousand men; but his British troops were mainly raw recruits, and the rest of his forces were very mixed, and included the Belgians who had already fled before the French cavalry. The preceding night had been wet and stormy, and when morning broke Napoleon considered the ground too heavy for cavalry. He therefore delayed the opening of the battle until between eleven and twelve in the forenoon. This delay was fatal. Time was most important to both commanders. Napoleon knew well that he must beat Wellington before Blücher could join him; Wellington, on the other hand, was determined to hold his ground to the last man, so as to give the Prussians time to come up in force and settle the issue of the day. The battle began with a fierce attack on Hougoumont; but it was held right manfully by the British Guards, and though the French won the gardens and orchards, they could not drive the defenders from the buildings. Then Napoleon sent his heavy columns against the British left, but they were utterly routed. His third effort was against the British centre, which he tried to break by heavy artillery fire and furious cavalry charges.