‘Yes, sire!’The sergeant saluted stiffly then turned to bellow orders to his men. Napoleon rode on, ignoring the other regiments he galloped through as he sought out Ney’s headquarters. By the time he reached the farm a mile south of the crossroads his mount was blown, and its flanks heaved like bellows as Napoleon climbed down from the saddle and walked stiffly to confront Marshal Ney.

‘Why are you not attacking the enemy?’ he snapped.

Ney’s face flushed red, and he opened his mouth to respond angrily, but controlled his temper just enough to growl back,‘I have not had any fresh orders to attack, sire. Not since I sent you my report of yesterday’s action.’

‘Orders? You do not need orders when you can see for yourself the need for action!’ Napoleon clenched his hands tightly. ‘Dear God, Wellington is all that stands between us and victory and you sit here on your arse and give him every opportunity to escape. Are you mad, Ney?’

‘No, sire.’

‘Then you must be a fool.’ Before Ney could respond to the insult Napoleon continued bitterly,‘Form your men up to attack. We can only hope that we can still catch Wellington before he slips away. Get to it, Ney. There is not a moment to waste!’ Napoleon turned away from his marshal, and found that he was facing General d’Erlon.

‘France has been ruined,’ Napoleon said bitterly. ‘Go, General. Place yourself at the head of your cavalry and make ready to pursue the enemy’s rearguard.’

It took nearly an hour for Ney’s forces to prepare for battle. In that time the haze had spread across the land and now dark clouds were closing up on the crossroads. The air felt hot and clammy and made Napoleon’s mood worse. He could only watch helplessly as, one by one, the regiments of Wellington’s line pulled back and joined the retreat.

Quatre Bras, 2.30 p.m.

‘Looks like we’re in for quite a storm,’ Uxbridge commented as he looked up at the dark clouds edging overhead.

Arthur nodded absent-mindedly. His attention was fixed on ground to the south of the crossroads. He had been expecting the French to renew their attack all morning, and yet nothing had happened. The army had started to withdraw towards Mont-St-Jean long before midday and now only the rearguard remained. Uxbridge’s cavalry, together with Mercer’s horse artillery and the rocket batteries, were all that stood between the crossroads and the enemy. At last, a few minutes earlier, he had heard the sound of bugles coming from the direction of the French and the men of the rearguard waited in tense expectation for first sight of the enemy.