XXIV.--The siege having been impeded by so many disadvantages, the soldiers, although they were retarded during the whole time, by the mud, cold, and constant showers, yet by their incessant labour overcame all these obstacles, and in twenty-five days raised a mound three hundred and thirty feet broad and eighty feet high. When it almost touched the enemy's walls, and Caesar, according to his usual custom, kept watch at the work, and encouraged the soldiers not to discontinue the work for a moment: a little before the third watch they discovered that the mound was sinking, since the enemy had set it on fire by a mine; and at the same time a shout was raised along the entire wall, and a sally was made from two gates on each side of the turrets. Some at a distance were casting torches and dry wood from the wall on the mound, others were pouring on it pitch, and other materials, by which the flame might be excited, so that a plan could hardly be formed, as to where they should first run to the defence, or to what part aid should be brought. However, as two legions always kept guard before the camp by Caesar's orders, and several of them were at stated times at the work, measures were promptly taken, that some should oppose the sallying party, others draw back the towers and make a cut in the rampart; and moreover, that the whole army should hasten from the camp to extinguish the flames. XXV.--When the battle was going on in every direction, the rest of the night being now spent, and fresh hopes of victory always arose before the enemy: the more so on this account because they saw the coverings of our towers burnt away, and perceived that we, being exposed, could not easily go to give assistance, and they themselves were always relieving the weary with fresh men, and considered that all the safety of Gaul rested on this crisis; there happened in my own view a circumstance which, having appeared to be worthy of record, we thought it ought not to be omitted. A certain Gaul before the gate of the town, who was casting into the fire opposite the turret balls of tallow and fire which were passed along to him, was pierced with a dart on the right side and fell dead. One of those next him stepped over him as he lay, and discharged the same office: when the second man was slain in the same manner by a wound from a cross-bow, a third succeeded him, and a fourth succeeded the third: nor was this post left vacant by the besieged, until, the fire of the mound having been extinguished, and the enemy repulsed in every direction, an end was put to the fighting.