Although the Christians had still much to suffer from thirst and the heat of the climate, the hope of soon seeing an end to their labours gave them strength to support them. The preparations for the assault were pressed on with incredible activity; every day some new formidable machine threatened the ramparts of the Saracens. Their construction was directed by Gaston of Béarn, of whose bravery and skill historians speak loudly. Among these machines were three enormous towers of a new form, each having three stages: the first destined for the workmen who directed the movements of it, and the second and third for the warriors who were to make the assault. These rolling fortresses rose to a greater height than the walls of the besieged city; on the top was a species of drawbridge, which could be lowered on to the ramparts and form a road into the place. But these powerful means of attack were not the only ones which were to second the efforts of the Crusaders. The religious enthusiasm which had already performed such prodigies, again lent its influence to augment their ardour and confidence in victory. The clergy, spreading themselves through the quarters, exhorted the pilgrims to penitence and concord. Misery, which always gives birth to complaints and murmurs, had soured their hearts; it had sown divisions between the leaders and the soldiers, who at other times had quarrelled for cities and treasures, but for whom now things the most common had become objects of jealousy and strife. The solitary from the Mount of Olives added his exhortations to those of the clergy; and, addressing the princes and people,--“You who are come,” said he, “from the far regions of the West to worship the God of armies, love each other like brethren, and sanctify yourselves by repentance and good works. If you obey the laws of God, He will render you masters of the holy city; if you resist Him, all His anger will fall upon you.” The solitary advised the Crusaders to make the tour of Jerusalem, invoking the mercy and protection of Heaven. The pilgrims, persuaded that the gates of the city were not less likely to open to devotion than bravery, listened with docility to the exhortations of the hermit, whose counsel they conceived to be the language of God himself. After a rigorous fast of three days, they left their quarters, in arms, and marched barefooted, with heads uncovered, around the walls of the holy city. They were preceded by their priests clothed in white, bearing the images of saints, and singing psalms and spiritual songs; the ensigns were unfurled, and the drums and trumpets called the echoes from the hills and valleys. It was thus the Hebrews had formerly made the tour of Jericho, whose walls crumbled away at the sound of their instruments.