Bennigsen conducted his army in perfect order to Konigsberg, and the Cossacks issuing from that city continued for more than a week to waste the country according to their pleasure, without any show of opposition from the French.

But the best proof how severely Napoleon had felt the struggle of Preuss-Eylau, is to be found in a communication which he made to Frederick William, on the 13th of February, five days after the battle, offering him, in effect, the complete, or nearly complete restoration of his dominions, provided he would accept of a separate peace: with the king's answer; namely, that it was impossible for him to enter on any treaty unless the Czar were a party in it.

Finally, on the 19th of February, Napoleon left Eylau, and retreated with his whole army on the Vistula; satisfied that it would be fatal rashness to engage in another campaign in Poland, while several fortified towns, and, above all, Dantzick, held out in his rear; and determined to have possession of these places, and to summon new forces from France, ere he should again meet in the field such an enemy as the Russian had proved to be.
Dantzick was defended with the more desperate resolution, because it was expected that, as soon as the season permitted, an English fleet and army would certainly be sent to its relief.

But the besiegers having a prodigious superiority of numbers, and conducting the siege with every advantage of skill, the place was at length compelled to surrender, on the 7th of May; after which event, Napoleon's extraordinary exertions in hurrying supplies from France, Switzerland and the Rhine country, and the addition of the division of 25,000, which had captured Dantzick, enabled him to take the field again at the head of not less than 280,000 men.

The Russian general also had done what was in his power to recruit his army during this interval; but his utmost zeal could effect no more than bringing his muster up again to its original point--90,000; the chief blame lying, as it was alleged, with the coldness of the English cabinet, who, instead of lavishing gold on the Emperor of Russia, as had been done in other similar cases, were with difficulty persuaded to grant him at this critical time, so small a supply as L80,000.