It was then, by an army which, however small, was confident of victory, against one which, however large, was beginning to doubt that final success would be theirs, that the siege operations began on the morning of the 8th of September. Thenceforth the besiegers worked night and day. Every night saw fresh batteries rising at a distance of only three hundred yards from the walls; fifteen hundred camels brought earth; three thousand men filled sandbags, placed fascines, and erected traverses for the guns. The batteries rose as if by magic. The besieged viewed these preparations with a strange apathy. They might at the commencement of the work have swept the ground with such a shower of grape and musketry fire that the erection of batteries so close to their walls would have been impossible; but for the first three nights of the work they seemed to pay but little heed to what we were doing, and when at last they awoke to the nature of our proceedings, and began a furious cannonade against the British, the works had reached a height that afforded shelter to those employed upon them. Each battery, as fast as the heavy siege guns were placed in position, opened upon the walls, until forty heavy guns thundered incessantly. The enemy now fought desperately. Our fire overpowered that of the guns at the bastions opposed to them; but from guns placed out in the open, on our flank, they played upon our batteries, while from the walls a storm of musketry fire and rockets was poured upon us. But our gunners worked away unceasingly. Piece by piece the massive walls crumbled under our fire, until, on the 13th, yawning gaps were torn through the walls of the Cashmere and Water bastions. That night four engineer officers--Medley, Long, Greathead, and Home--crept forward and examined the breaches, and returned, reporting that it would be possible to climb the heaps of rubbish and enter at the gaps in the wall. Orders were at once issued for the assault to take place at daybreak next morning.