The number of those employed in the work was increased as fast as there was room for them; and while the Rebu thought that there were at most a dozen men in each of the sheltered places, there were, at the end of twenty-four hours, fully two hundred men at work in the heart of the embankment at each point. The Egyptian king had ordered the chief of his engineers to have everything in readiness for the capture of the city by the end of the third day. Each night the numbers of workmen increased, while the excavations were carried in further and further. No picks were used in the work, the earth being cut away with wide daggers. Absolute silence was enjoined among the workers, and they were thus enabled to extend their excavations close to the surface without the defenders having an idea of their proximity. The distance that they were from the inner face was ascertained by boring through at night-time with spears. By the end of the third day the excavations had been carried so far that there was but a foot or so of earth remaining, this being kept from moving, on pressure from the outside, by a lining of boards supported by beams. Thus at twenty points the Egyptians were in readiness to burst through among the unsuspecting defenders. As soon as it was dark the preparations for the assault began. Great numbers of stagings of vast length had been prepared, together with an immense number of broad and lofty ladders. These last were brought forward noiselessly to the foot of the cliff, and great numbers of the Egyptians mounted before the alarm was given by those on the walls. But by this time the excavations were all crowded with men. The Egyptian army now advanced with shouts to the assault. The great stages were brought forward by the labor of thousands of men and placed against the cliff. The besieged had now rushed to defend the walls, and volleys of missiles of all sorts were poured down upon the Egyptians as they strove to mount the ladders and stages. No one thought of any possible danger from the little shelters lying at the foot of the wall, and the din was so great that the work of digging through the remaining wall of earth was unheard. The troops who had been specially told off to watch these points had joined their comrades on the walls, and none marked the stream of dark figures which presently began to pour out from the embankment at twenty different points.