‘Lunatic or sane, he deserved to be shot, along with the others,’ said Napoleon as he shuffled his stool closer to the stove. Outside the barn a blizzard was blowing, adding to the snow of the previous days. The imperial headquarters had struggled on until after dark before reaching the barn and the handful of sheds that were the only shelter the scouts had been able to find for the night. A stove had been fetched from the imperial baggage and one of the carts was broken up for firewood, providing enough for the stove and a small blaze outside where the sentries drawn from the Old Guard were huddled.

As twilight settled over the snow, painting the winter landscape in a pale blue hue, the headquarters staff had encountered a messenger on the road to Smolensk. The sealed despatch bag had only been opened once Napoleon had eaten and warmed himself by the stove. There was a message from the Minister of Police marked Most urgent, which Napoleon read first.

The minister reported that there had been an attempt by some senior army officers to seize power. The ringleader was General Malet, a longstanding opponent of the Emperor who had been committed to an asylum. Somehow, he had managed to escape. Arriving in Paris with a forged army despatch, he had declared that Napoleon had died in Russia, and managed to persuade a number of officers to join his cause. It was only when the military governor of Paris refused to believe the news that the plot was foiled and the culprits were arrested, tried and shot.

‘Well, it’s over now.’ Berthier folded the despatch and placed it in the document box of correspondence that had been read. ‘From the sound of things it stood no chance of success.’

‘You’re missing the point,’ Napoleon said wearily. ‘I don’t doubt that Malet and his friends would have failed. The soldiers in Paris would never have gone over to them. What worries me is that so many officials were prepared to believe that I was dead.’ He looked earnestly at Berthier.‘Don’t you see? It does not take long for my hold on power to slip when I leave Paris for any length of time.’ He was silent for a moment, staring at the beaten earth between his boots.‘It seems that my presence is needed in Paris as soon as I have led the army to safety for the winter.’