‘Yes, sire.’ General Milhaud saluted and then called out for his men to advance. Napoleon and his escort waited at the side of the road as the dark figures of the mounted column splashed by and disappeared into the night. There was no sound for nearly ten minutes, then all at once a bright flare of light appeared on the ridge, followed by the boom of a gun. More jets of flame stabbed out along a line bestriding the road and Napoleon nodded with grim satisfaction. Wellington was there all right. Close enough to be forced to stand his ground and fight in the morning. Napoleon turned his horse back and returned to the farmhouse. The headquarters servants were still preparing the accommodation, so he rested on some straw spread in a wide trough in one of the barns as he waited.

His fury at Ney had hardly abated. The opportunity to force a battle on Wellington at the crossroads had been lost, and now the arrival of the storm had hampered the army’s attempt to close up on their enemy. The men were exhausted, and strung out along the road towards Quatre Bras. It would be many hours before they caught up with the vanguard, ready to continue the pursuit once the storm had passed.

Napoleon knew that some measure of the blame attached to him as well. Too many hours had passed that morning before he had grasped the need to move on Wellington’s army. Exhaustion had played its part. He had not slept properly for many days and the normal heightened alertness of his mind was dulled. But there was something else, he mused. He had been so certain of his assumptions that Blücher had deserted his allies, and that Ney would have taken Quatre Bras. That was an error of judgement. The breathless speed with which he had recovered power in France, together with the hysterical joy that had greeted his return, had made him feel invulnerable and infallible. Today had been a rude reminder of a commander’s need to constantly adapt to circumstances.

As soon as the farmhouse had been prepared for the Emperor and his staff, Napoleon summoned his senior officers. Over the next hour, the marshals and generals of division arrived, in drenched coats and splattered with mud. There was only one room in the farmhouse large enough to accommodate them all and most of the officers had to stand as they crowded about the Emperor, who was himself perched on a stool.