‘Damn Pajol,’ Napoleon muttered. ‘What is he playing at? Why doesn’t he report?’

‘We have to assume he has not found the Prussians, sire.’ Grouchy leaned towards him and spoke in a low urgent tone.‘For pity’s sake, sire. We must act now.’

Napoleon stared at him for a moment and then nodded. ‘Very well. Take your men and pursue Blücher. Keep your sword in his back. Meanwhile I will use Ney and the reserve to deal with Wellington.’

‘Yes, sire.’ Grouchy bowed his head with a relieved expression. ‘I will set out at once.’

Napoleon nodded his consent and then abruptly turned his horse back in the direction of headquarters and spurred it into a gallop. The decision was made and now he must strike at Wellington as swiftly as possible, before the Duke could retreat out of danger. He returned to Soult just long enough to give the order for the reserve to move on Quatre Bras and then rode towards the crossroads to join Marshal Ney and his men.

The day was warm and the air quite still. To the east the sky was obscured by a dull haze. Directly above him only a handful of clouds floated serenely across the lush green of the Belgian countryside. Yet it was the very peacefulness that concerned Napoleon as he urged his mount on. There was no sound of cannon fire from the direction of Quatre Bras. If Wellington was still there then surely he should be hotly engaged by Ney’s forces?

As the road crested a rise Napoleon saw the sprawling camp of the left wing of his army. There was no sign of any formation ready to advance and do battle. Ahead, astride the crossroads, he could see the thin red blocks of Wellington’s army, interspersed with artillery batteries as they stood ready to defend their position. Beyond, in the distance, he could see more columns, moving in the direction of Brussels. Napoleon felt his stomach knot in fury as he beheld the scene, and he dug his spurs in sharply as he galloped on.

A mile later the road passed through an infantry regiment. The men were sitting quietly around their camp fires where pots of stew simmered, suspended beneath the iron cooking tripods. The pounding of hooves drew the attention of the closest men and they sprang to their feet as they recognised the Emperor, but the first cheers died in their throats as Napoleon reined in and shouted at them.‘What the hell is this? What are you doing here? To arms, you fools!You there!’ Napoleon thrust his finger towards the nearest sergeant.‘Find your colonel. You tell him the Emperor wants this regiment formed up and ready to march in ten minutes. If it isn’t I’ll have him shot. And pass the word on to other units!’