Napoleon continued by giving a casualty figure that was half the true amount. Even this would cause great consternation in France, but the full total must wait until he had returned and could break the news in person. He wrote about the dreadful climate and offered rousing descriptions of the battle at Borodino and the heroic crossing of the Berezina. He described the glorious achievement of Marshal Ney and the band of heroes in his rearguard as it fought its way through the Russian army to re-join the Emperor. Napoleon concluded with a final sentence to allay their fears. His majesty’s health has never been better.

Setting down his pen, he called for Berthier to copy his draft into a legible hand and then signed and sealed the document before giving it to Savary’s courier.

‘Leave at once. Tell the minister I will follow you as soon as I can.’

A fresh blizzard blanketed the Russian landscape over the following days and the army grimly continued its retreat, heads down and leaning into the wind as it buffeted the shambling columns, as well as the civilians who had survived the Berezina crossing and had escaped the attentions of the Cossacks so far. Napoleon had ordered Berthier to make secret preparations for his departure for Paris, and when the foul weather lifted five days later, as the army crept into Smorgoni, he decided the time had come.

The marshals of the army were summoned from their billets into his presence that evening. They had been told that they were required for a briefing on the army’s progress towards the Niemen, and slumped wearily down into the chairs set around a long table in the town’s guild hall. Napoleon had given instructions for his last stocks of wine and brandy to be fetched and the marshals gratefully helped themselves as they waited for the last of their number to arrive. Ney was commanding the rearguard again and had the furthest to travel, and he did not reach the town until late in the evening. He unbuttoned his snow-flecked coat and slung it across a side table as he joined his companions, smiling at the sight of the brandy.

‘Ah! Now there’s a sight for sore eyes.’ He poured a generous glass and downed it in one, then coughed to clear his burned throat.‘Needed that! Nothing like brandy to put fire back into a man’s belly.’

Napoleon waited until Ney was seated and then rapped his glass on the table. ‘Quiet, if you please.’

The marshals settled back into their chairs and looked at him expectantly. Napoleon was too weary to waste time with any preamble praising their efforts and promising rewards when they all returned to France. He drew a deep breath and began in a flat tone.