It took the rest of the day and through the night for the army to negotiate the pass and stumble into the town of Villacastin on the far side of the Guadarrama range. But there was little chance to rest the exhausted soldiers. Reports reached Napoleon that General Moore had begun to retreat to the north. A deadly race was on.The British seemed to be making for the port of Corunna where, no doubt, their navy would be waiting to evacuate them. But if Soult was still in a position to block their retreat then General Moore and his men were trapped and would be crushed. Napoleon took warm satisfaction from this chance to humiliate his oldest enemy. Such a catastrophe would rock Britain to its foundations and they would never dare to attempt another campaign in Europe on such a scale again.

So the Emperor drove his men on, often leading the pursuit at the head of a squadron of Guard cavalry as the army sped north.They began to pass the bodies of the first of the enemy’s stragglers, cut down by the pursuing French cavalry.Then came the wagons, lying abandoned at the side of the road. Napoleon rode through towns and villages which had been looted by the British as their discipline began to fail. Some of the redcoats had been so drunk or exhausted that they could not continue and simply sat in the streets waiting to be taken prisoner. But the British were not the only enemies facing the French.

On the morning that Napoleon reached the town of Valderas, a mere two hours after the British rearguard had retreated from the town, they came across a small farm beside the road a short distance away.The farm was deserted, save for the bodies in front of the barn. Two French hussars had been staked, spreadeagled, on the ground. Their eyes had been gouged out and they had been mutilated and disembowelled. But they were the lucky ones, Napoleon reflected.Their officer, a lieutenant, had been nailed, upside down, to the door of the barn. Below him lay the smouldering remains of a small fire. His head and shoulders were burned black as pitch.

‘Bastards,’ someone muttered behind Napoleon.

The captain of the squadron edged his mount forward and cleared his throat. ‘First six men, fall out and bury those bodies.’

‘No!’ Napoleon intervened. ‘Leave them.’

‘Sire?’ The captain turned to him with a surprised look. ‘Surely we can’t leave them there, for all our men to see?’

‘That’s precisely why we are leaving them there. Let everyone in the army know what awaits them if they stray from their comrades to loot, or straggle.’

The captain thought about protesting, but then swallowed and nodded. ‘Yes, sire.’

‘Now let’s go.’ Napoleon spurred his horse on and the small column rode away, leaving the three bodies behind to serve as an example to the men who followed.