Mortier had obeyed his orders: the Kremlin was no more.[165] Barrels of powder had been placed in all the halls of the palaces of the Czars, and one hundred and eighty-three thousand pounds under the vaults which supported them. The marshal, with eight thousand men, had remained on this volcano, which a single Russian shell might have exploded. Here he covered the march of the army upon Kaluga, and the retreat of our different convoys towards Mojaisk.
Among these eight thousand men there were scarcely two thousand on whom Mortier could rely; the others were dismounted cavalry, men of different countries and regiments, under new officers, with dissimilar habits, with no common recollections, in short, without any bond of union, forming a rabble rather than an organized body, and who could scarcely fail in a short time to disperse.
This marshal, therefore, was looked upon as a doomed man. The other chiefs, his old companions in glory, had left him with tears in their eyes, as well as the emperor himself, who said to him "that he relied on his good fortune; but still, in war, we must sometimes make part of a sacrifice." Mortier resigned himself without hesitation to his fate. His orders were to defend the Kremlin, and on retreating to blow it up, and to burn what still remained of the city. It was on the 21st of October, that Napoleon sent him his last commands. After executing them, the marshal was to march upon Vereïa, and to form the rear guard of the army.
In this letter Napoleon particularly recommended to him "to put the men still remaining in the hospitals into the carriages belonging to the young rear guard, those of the dismounted cavalry, and any others that he might find. The Romans," he added, "awarded a civic crown to him who had saved a citizen: so many soldiers as he should save, so many crowns would the Duke of Treviso deserve."
At length, after four days' resistance, the French bade a final adieu to that fatal city. They carried with them four hundred wounded, and, on retiring, deposited in a safe and secret place a firework, skilfully prepared, which was already slowly consuming: the rate of its burning had been minutely calculated, so that it was known precisely at what hour the fire would reach the immense collection of powder buried among the foundations of these devoted palaces.