The combined forces now determined to strike at the Sultan first through Egypt, and urged thereto by John of Brienne, sailed up the Nile to attack Damietta, one of the strong fortresses which guarded that land. The city seemed impregnable, for it was not only surrounded by three thick walls, but was also protected by a double wall on the side facing the Nile, and by a tower built in the middle of the river, from which was stretched to the ramparts an enormously strong iron chain.

The story of this siege is intermingled with strange legends. A high wooden tower had been built upon two of the Crusaders' ships, from which they hoped to attack the river fortress, but this was quickly set on fire by the Saracens, while the banner of the Holy Cross was seen to drift helplessly down the stream. The terrified onlookers from the banks flung themselves on their knees and implored the help of God at this crisis; upon which it is said that the flames died down, while before the astonished eyes of the Crusaders the banner was seen to wave from the top of the tower in the river.

Much encouraged, they made a fresh attack with such vigour that the enemy threw down their arms and the tower was won.

The legend says that when the chief prisoners were brought into the Christian camp, they asked to be shown the troop of white clothed men bearing shining white swords, the brilliance of whose appearance they declared to have so dazzled their eyes that they could not see to fight longer; and so, says the chronicler of these things, "the Crusaders knew that the Lord Christ had sent His Angels to attack that tower."

While the siege of Damietta itself was still in progress, news arrived of the death of Saphadim, the Sultan, and of the accession of his two sons. The "Sword of Religion," as his Moslem followers called Saphadim, had been a wise as well as a valiant ruler; his successors were weak and incapable. Aghast at the thought of losing their famous seaport, and alarmed at the arrival of many new pilgrims, some hailing from France, others from England, the two young men at length sent messengers with an offer wrung from them, they said, "because the power of God was against them."

They promised, in fact, to give up Jerusalem and the whole of Palestine to the Crusaders if the latter would agree to depart at once from Egypt.

Considering that the freeing of the Holy Land from infidel rule was the only true aim of the Crusaders, we can only be amazed at finding that the offer was rejected.

John of Brienne, "the King of Jerusalem," was eager enough to accept it; so too were the Knights Templars and Hospitallers mindful of their vows. But there was present in the camp a certain Cardinal Pelagius, the papal legate, who claimed, as representative of the Pope, to have the final decision in the matter; and he, fearing probably that the supreme power would fall into the hands of John of Brienne, supported by the French Crusaders and afterwards by the Knights of the Temple and Hospital, carried the day against the Sultan, and caused the siege of Damietta to be resumed.

Plague had already done its work within the walls, and there remained little for the Crusaders to do. Damietta was theirs, and a sorry triumph it proved.