It was not long before the wall in the front of the Jews' quarter began to crumble, and it was soon evident that it must, ere many days, succumb to the storm of missiles hurled against it. D'Aubusson lost no time in making preparations to avert the danger. He ordered all the houses in rear of the wall to be levelled; a deep semicircular ditch was then dug, and behind this a new wall, constructed of the stones and bricks from the houses destroyed, was built, and backed with an earthen rampart of great thickness and solidity.