The two roads which led through the lake were soon so encumbered and blocked up by ammunition wagons and carts that they became impassable; and as the masses of the fugitives thickened, they spread over the lake, which happened to be frozen. It was at this time that the Emperor came up, and seeing the cavalry halted, and no longer in pursuit of the flying columns, ordered up twelve pieces of the artillery of the Imperial Guard, which, from the crest of the hill, opened a murderous fire on them. The slaughter was fearful as the discharges of grape and round shot cut channels through the jammed-up mass, and tore the dense columns, as it were, into fragments. Dreadful as the scene was, what followed far exceeded it in horror; for soon the shells began to explode beneath the ice, which now, with a succession of reports louder than thunder, gave way. In an instant whole regiments were ingulfed, and amid the wildest cries of despair, thousands sank never to appear again, while the deafening artillery mercilessly played upon them, till over that broad surface no living thing was seen to move, while beneath was the sepulchre of five thousand men. About seven thousand reached Austerlitz by another road to the northward; but even these had not escaped, save for a mistake of Bernadotte, who most unaccountably, as it was said, halted his division on the heights. Had it not been for this, not a soldier of the Russian right wing had been saved. The reserve cavalry and the dragoons of the Guard were now called up from the pursuit, and I saw my own regiment pass close by me, as I stood amid the staff round Murat. The men were fresh and eager for the fray; yet how many fell in that pursuit, even after the victory! The Russian batteries continued their fire to the last. The cannoneers were cut down beside their guns, and the cavalry made repeated charges on our advancing squadrons; nor was it till late in the day they fell back, leaving two thirds of their force dead or wounded on the field of battle. On every side now were to be seen the flying columns of the allies, hotly followed by the victorious French. The guns still thundered at intervals; but the loud roar of battle was subdued to the crashing din of charging squadrons, and the distant cries of the vanquishers and the vanquished. Around and about lay the wounded in all the fearful attitudes of suffering; and as we were fully a league in advance of our original position, no succor had yet arrived for the poor fellows whose courage had carried them into the very squares of the enemy.