The guns which had been rendered useless were soon replaced, and an incessant fire was kept up upon the three great breaches; on the 18th, the French engineers declared that all three were practicable. Monjuic had taught the enemy not to be too confident of success; the breaches indeed were of such magnitude that it seemed scarcely possible they should fail in storming them, but they knew that victory must be dearly purchased. In the evening, therefore, they sent a white flag; it was not noticed from the town, and the officers who accompanied it made signs to the Spaniards; there was no firing at this time, and the men, both of the besieging army and the town, were looking silently and intently on, to await the issue. Alvarez at length sent a verbal order to the French officers to retire, ... they requested to be heard, and were told from the walls to retire on peril of their lives; they persisted in offering a letter, and then both the castle of the Constable and the tower of Gironella fired. As soon as the officers reached their own lines, the batteries were again opened, some upon the breaches, others throwing shells into the town. During the night this was kept up, and the enemy collected troops upon the heights of Campdura and in Monjuic, for the assault. At daybreak they were seen in motion in different parts, with the purpose, it was supposed, of calling off attention from the real points of danger. The whole ♦SEPT. 19.♦ forenoon was employed in preparation. Between three and four, the watch on the cathedral informed Alvarez that troops were descending from Monjuic to St. Daniel. At the same time the like intelligence arrived from the forts of the Constable and of the Capuchines; and another messenger from the cathedral followed, with tidings that the enemy were advancing in force both from Monjuic and St. Daniel against the breaches, and that many of them carried instruments for sapping.