On the 18th of October, at the very moment that the cannon of Kutusoff were destroying Napoleon's illusions of glory and of peace, Wittgenstein, at one hundred leagues in the rear of his left wing, had thrown himself upon Polotsk; Tchitchakof, behind his right, and two hundred leagues farther off, had taken advantage of his superiority over Schwartzenberg; and both of them, one descending from the north, and the other ascending from the south, were endeavouring to unite their forces at Borizof.

This was the most difficult passage in our retreat, and both these hostile armies were already close to it, at the time that Napoleon was at the distance of twelve days' journey, with the winter, famine, and the grand Russian army between them.

At Smolensk it was only suspected that Minsk was in danger; the officers who were present at the loss of Polotsk gave the following details respecting it:—

Ever since the battle of the 18th of August, which raised him to the dignity of marshal, Saint Cyr had remained on the Russian bank of the Düna, in possession of Polotsk, and of an entrenched camp in front of its walls. This camp showed how easy it would have been for the whole army to have taken up its winter quarters on the frontiers of Lithuania. Its barracks, constructed by our soldiers, were more spacious than the houses of the Russian peasantry, and equally warm: they were beautiful military villages, properly entrenched, and equally protected from the winter and from the enemy.

For two months the two armies carried on merely a war of partizans. With the French its object was to extend themselves through the country in search of provisions; on the part of the Russians, to strip them of what they found. A war of this sort was entirely in favour of the Russians, as our people, being ignorant of the country as well as of the language, even of the names of the places where they attempted to enter, were incessantly betrayed by the inhabitants, and even by their guides.

In consequence of these checks, and of hunger, and disease, the strength of Saint Cyr's army was diminished one half, while that of Wittgenstein had been more than doubled by the arrival of recruits. By the middle of October, the Russian army at that point amounted to fifty-two thousand men, while ours was only seventeen thousand. In this number must be included the 6th corps, or the Bavarians, reduced from twenty-two thousand to eighteen hundred men, and two thousand cavalry. The latter were then absent; Saint Cyr being without forage, and uneasy respecting the attempts of the enemy upon his flanks, had sent them to a considerable distance up the river, with orders to return by the left bank, in order to procure subsistence and to gain intelligence.

For this marshal was afraid of having his right turned by Wittgenstein and his left by Steingell, who was advancing at the head of two divisions of the army of Finland, which had recently arrived at Riga. Saint Cyr had sent a very pressing letter to Macdonald, requesting him to use his efforts to stop the march of these Russians, who would have to pass his army, and to send him a reinforcement of fifteen thousand men; or if he would not do that, to come himself with succours to that amount, and take the command. In the same letter he also submitted to Macdonald all his plans of attack and defence. But Macdonald did not feel himself authorized to operate so important a movement without orders. He distrusted Yorck, whom he perhaps suspected of an intention of allowing the Russians to get possession of his park of besieging artillery. His reply was that he must first of all think of defending that, and he remained stationary.

In this state of affairs, the Russians became daily more and more emboldened; and finally, on the 17th of October, the out-posts of Saint Cyr were driven into his camp, and Wittgenstein possessed himself of all the outlets of the woods which surround Polotsk. He threatened us with a battle, which he did not believe we would venture to accept.

The French marshal, without orders from his Emperor, had been too late in his determination to entrench himself. His works were only marked out as much as was necessary, (not to cover their defenders), but to point out the place where their efforts would be principally required. Their left, resting on the Düna, and defended by batteries placed on the left bank of the river, was the strongest. Their right was weak. The Polota, a stream which flows into the Düna, separated them.

Wittgenstein sent Yatchwil to threaten the least accessible side, and on the 18th he himself advanced against the other; at first with some rashness, for two French squadrons, the only ones which Saint Cyr had retained, overthrew his column in advance, took its artillery, and made himself prisoner, it is said, without being aware of it; so that they abandoned this general-in-chief, as an insignificant prize, when they were forced by numbers to retreat.