1. NOW when Caesar perceived that the upper city was so steep that it could not possibly be taken without raising banks against it, he distributed the several parts of that work among his army, and this on the twentieth day of the month Lous [Ab]. Now the carriage of the materials was a difficult task, since all the trees, as I have already told you, that were about the city, within the distance of a hundred furlongs, had their branches cut off already, in order to make the former banks. The works that belonged to the four legions were erected on the west side of the city, over against the royal palace; but the whole body of the auxiliary troops, with the rest of the multitude that were with them, [erected their banks] at the Xystus, whence they reached to the bridge, and that tower of Simon which he had built as a citadel for himself against John, when they were at war one with another.