At this point in the contest the Prussian reinforcements, long expected, appeared in turn suddenly on the field, and passing the left of the French and right of the Russians, pushed down in three columns to redeem the battle on the Russian centre and rear. The Prussians, under their gallant leader L'Estocq, never fired until within a few paces of the enemy and then used the bayonet with fearful effect. They redeemed the ground which the Russians had lost and drove back in their turn the troops of Davoust and Bernadotte who had lately been victorious. Ney, in the meantime appeared on the field with his advanced guard and occupied Schnaditten, a village on the road to Konigsberg. As this endangered the communication of the Russians with that town, it was thought necessary to carry it by storm; a resolution which was successfully executed, the enemy's rear-guard retreating in disorder.
This was the last act of that bloody day at Eylau. It was ten o' clock at night and darkness put an end to the combat. After fourteen hours of fighting both armies occupied the same positions taken in the morning. It was in fact the longest and by far the severest battle Napoleon had yet been engaged in. At the beginning of the contest, Augereau was scarcely in his senses, from the severity of rheumatic pain to which he was subject; but the sound of the cannon awakens the brave: he flew at full gallop at the head of his corps, after causing himself to be tied to his horse! He was constantly exposed to the hottest of the fire, and was only slightly wounded.
A few days after the battle Napoleon sent to Paris sixteen stands of colors taken on that occasion and ordered the cannon to be melted down and made into a statue of General d' Haulpoult, in the uniform of his regiment, he having gallantly commanded the second division of cuirassiers, when he was killed in the action.
In three letters which the Emperor wrote to Josephine during the month of February he alluded with the deepest affection to the horrors of this engagement. "We had yesterday," he said, "a great battle. The victory was mine, but I have been deprived of a great many men. The loss of the enemy, still more considerable, does not console me." "The land is covered with dead and wounded," he adds in a second letter; "This is not the noble portion of war. One is pained, and the soul is oppressed at the sight of so many victims."
In the biting frost, in face of thousands of dead and dying, when the gloomy day was sinking into a night of anguish, the Emperor had said: "This sight is one to fill rulers with a love of peace and a horror of war," and in his bulletin of the engagement he said: "Imagine, on a space of a league square, nine or ten thousand corpses, four or five thousand dead horses, lines of Russian knapsacks, fragments of guns and sabres; the earth covered with bullets, shells, supplies; twenty-four cannon, surrounded by their artillerymen, slain just as they were trying to take their guns away; and all that in plainest relief on the stretch of snow!"
Twelve of Napoleon's eagles were in the hands of the Russians, and the field between them was covered with 50,000 corpses, of whom at least half were French. Each leader claimed the victory. The Russians retired from Eylau towards Konigsberg the very night after the battle, and the French made no effort to pursue but remained on the field nine days to allow the troops some repose.
It was in truth a drawn battle. The point of superiority on this dreadful day would have been hard to decide, but the victory, if rightly claimed by either party, must be pronounced to have remained with Napoleon; for Bennigsen retreated and left him master of the field of battle where he slept and remained for days; but it was a ghastly triumph. During the whole time the contest lasted Napoleon's countenance was never observed to change; nor did he show any emotion whatever; but all accounts agree that he was deeply impressed with the horrors of the succeeding night.
Finally, on the 19th of February, Napoleon left Eylau and retreated with his whole army to Osterode on the Vistula. Here he established his headquarters, living in a sort of barn, governing his Empire and controlling Europe. The doubtful issue of the battle of Eylau had given a shock to public opinion and it required all the Emperor's prudence and address to overcome it. Great despondency was produced in Paris by the bulletin of the battle and a marked depression took place in the funds.