At 6 o'clock, the firing on both sides had entirely ceased. Profiting by this interval, the Polish army pursued its route, and the Russian infantry again commenced debouching upon the bridge. At dusk, nearly the whole Polish army was on the march to Warsaw, and one division only [_Plan_ XXXI, (_d_)] remained on our position. On the part of the Russian army, we may suppose that nearly two divisions had passed the bridge, when our general in chief, wishing to profit by the obscurity of the night, in order to subject the enemy to still greater losses, conceived the bold idea of advancing our artillery (_a_) so near the Russian columns (_b_), as to pour upon them a fire of grape-shot. General Skrzynecki himself approached colonel Boehm, and taking the command of the twelve pieces of light artillery under him, led them in person to the distance of within three hundred paces of the enemy, and brought forward at the same time two regiments of cavalry for the support of this artillery. Placing this little detachment in a very advantageous position behind small elevations of ground, he commanded colonel Boehm to commence firing. The Russian columns were thrown into confusion by this unexpected and terrible fire; and it may be imagined that their loss was immense, enclosed as they were within a narrow space, on the bank and on the bridge. Every discharge of the artillery was with effect, and by the testimony of the prisoners taken, their loss must have amounted to an entire brigade, without estimating those who left the field wounded, and those who fell into the river. On our side, this attack cost us only the loss of two officers of the artillery, although this detachment was exposed to the fire of the whole Russian artillery.[63] Our battery fired but three rounds, when the general gave the order to withdraw, and follow the main army (A) to Warsaw.[64] These are the details of the battle of Ostrolenka, in which the loss on the enemy's side was from 10,000 to 15,000 men, and on our side, the two general officers above mentioned, with about 4,000 men. On the afternoon of the day of the battle of Ostrolenka, the division of general Gielgud received orders to depart from the town of Lomza. General Dembinski, on the night of the same day was ordered to join him with two squadrons of lancers of Poznan. The latter general left the field of battle with these squadrons, and on the next day joined the division of general Gielgud.[65] [Illustration: _XXXI._] [Illustration: _XXXII._] FOOTNOTES: