During the 22nd of February, the besiegers could not restore battery No. 1, because the besieged kept up a constant discharge on this point. They succeeded only at nightfall in remounting their guns in batteries 2 and 3; and having determined the range before night, discharged the balls of two guns on the salients of the redans. About midnight Colonel Dubois sent out five hundred men, who, traversing the western ridge of the plateau, attacked battery No. 1. A few moments afterwards, a second troop of four hundred men attacked the two batteries, 2 and 3; and the besieger having been dislodged from battery No. 1, the first troop of the besieged came and formed in line of musketry between battery No. 2 and the salient of the redan on the right; while fusiliers posted at the trench, A,[62] and one of the howitzers, swept the ground as far as battery No. 1, in order to hinder the enemy from taking the sortie in the rear. This operation was completely successful; not only were the works of battery No. 1 damaged, and the three guns with which it was armed (the carriages belonging to these guns, as stated above, were already broken), but around batteries 2 and 3 there was a very sharp struggle which resulted in the Germans being repulsed, the guns rendered useless, the munitions scattered, and the gabions and earth-bags thrown down. A body of a hundred men had also been posted by the colonel on the slopes of the plateau to hinder the enemy from making his way along that escarpment to attack the work A. Under favour of this sortie, two hundred workmen had been placed by Captain Allaud along the western ridge of the plateau, to raise a new work, B C D (Fig. 74), which consisted of three new redans presenting three batteries each for two guns, traced _en crémaillère_, and separated by strong traverses. By the morning of the 23rd of February the first battery, B, was sufficiently strong to resist projectiles. Moreover, this battery could not be immediately attacked by battery No. 1, which was abandoned, and whose guns were useless. Forty-eight hours at least were required to enable the besieger to restore batteries 2 and 3. Batteries 4 and 5 must change their embrasures to direct their fire on this battery B, and only batteries 6 and 7 could sweep the redans A and B. Now these batteries, 6 and 7, received the fire of the two guns of the right face of the right-hand redan, of the two guns of the right face of the bastion II., of the two guns of the left face of the bastion III., and of a gun of the right face of the demi-lune 2. Every moment it was necessary to repair the gabionades, and replace the earth-bags; and since the beginning of the day the enemy had had ten artillerymen killed, and as many more wounded, in these two batteries.