XV.--Trebonius began to provide and repair what had been destroyed, with much greater zeal on the part of the soldiers; for when they saw that their extraordinary pains and preparations had an unfortunate issue, they were fired with indignation that, in consequence of the impious violation of the truce, their valour should be held in derision. There was no place left them from which the materials for their mound could be fetched, in consequence of all the timber, far and wide, in the territories of the Massilians, having been cut down and carried away; they began therefore to make an agger of a new construction, never heard of before, of two walls of brick, each six feet thick, and to lay floors over them of almost the same breadth with the agger, made of timber. But wherever the space between the walls, or the weakness of the timber, seemed to require it, pillars were placed underneath and traversed beams laid on to strengthen the work, and the space which was floored was covered over with hurdles, and the hurdles plastered over with mortar. The soldiers, covered overhead by the floor, on the right and left by the wall, and in the front by the mantlets, carried whatever materials were necessary for the building without danger: the business was soon finished--the loss of their laborious work was soon repaired by the dexterity and fortitude of the soldiers. Gates for making sallies were left in the wall in such places as they thought proper. XVI.--But when the enemy perceived that those works, which they had hoped could not be replaced without a great length of time, were put into so thorough repair by a few days' labour and diligence, that there was no room for perfidy or sallies, and that no means were left them by which they could either hurt the men by resistance or the works by fire, and when they found by former examples that their town could be surrounded with a wall and turrets on every part by which it was accessible by land, in such a manner that they could not have room to stand on their own fortifications, because our works were built almost on the top of their walls by our army, and darts could be thrown from our hands, and when they perceived that all advantage arising from their engines, on which they had built great hopes, was totally lost, and that though they had an opportunity of fighting with us on equal terms from walls and turrets, they could perceive that they were not equal to our men in bravery, they had recourse to the same proposals of surrender as before.