Melik-Kamel caused the sluices to be closed, and the waters rapidly retired from the plain; as soon as Damietta was surrendered to the Mussulmans, the Christian army began its retreat. The Crusaders, who owed their liberty and lives to the mercy of the Saracens, passed through the city which had cost them so many conflicts and so much labour; and, weeping, quitted the banks of the Nile, where so short a time before they had sworn to make the cause of Christ triumphant. They bore away in sadness the wood of the true cross, the identity of which they had reason to suspect, since it no longer performed miracles, and was not for them now the signal of victory. The sultan of Egypt caused them to be accompanied by his son, who had orders to provide for all their wants on their route. The Saracen leaders were impatient to get rid of an army that had threatened their empire; they could scarcely give credit to their own triumph, and some little apprehension was, no doubt, mingled with the pity with which their conquered enemies inspired them. Great rejoicings had been made at Ptolemaïs for the victories obtained by the Christians on the banks of the Nile; they believed that they already saw the holy places delivered, and the empire of the Saracens destroyed. Consternation took place of their joy on seeing the army return. As in all the other reverses which their arms had met with, the Christians mutually reproached each other with their defeat; they accused the leaders of ambition, and the king of Jerusalem of weakness; the Templars and Hospitallers, who had on all occasions set an example of courage and the most generous devotedness, were obliged to make a public apology for their conduct. When it became known in the West that Damietta had fallen again into the hands of the Saracens, all the faithful were affected by the deepest grief,[231] and sought, by their prayers, to mitigate the anger of Heaven. Violent murmurs arose against the legate Pelagius, and represented him to the sovereign pontiff as the author of all the disasters of the crusade; but Honorius was not willing to condemn his minister, and reproached Frederick, who had three times renewed his vow to fight against the infidels, with having remained an idle spectator of an unfortunate war, and with having neglected to succour his brethren of the East.