At length there came a pause in the decline of Islam. Zengi, a powerful Seljuk Atabeg, in 1144 captured Edessa, the outpost of Christendom, and the Second Crusade, led by the Emperor Conrad of Germany and by King Louis VII of France, failed to effect the recapture of the fortress. Nureddin, the far-sighted son and successor of Zengi, and later on Saladin, a Kurd, trained at his court, discovered how to restore the fallen might of Islam and expel the Franks from Asia. A necessary preliminary step was to put an end to the dissensions of the Atabeg rulers. Nureddin did this effectually by himself annexing their dominions. His next step was to gain possession of Egypt, and thereby isolate the Latin Kingdom. Genoa, Pisa, and Venice, the three Italian republics who between them had command of the sea, were too selfish and too intent upon their commercial interests to interfere with the designs of the Saracens. The Latin king Amalric had for some years sought to gain a foothold in Egypt. In November, 1168, he led the Christian army as far as the Nile, and was about to seize Fostat, the old unfortified Arab metropolis of Egypt. The inhabitants, however, preferred to set fire to the city rather than that it should fall into the hands of the Christians. To this very day many traces may be seen in the neighbourhood of Cairo of this conflagration. Nureddin's army, in which Saladin held a subordinate command, by a timely arrival on the scene forced the Franks to retreat, and the Saracens were acclaimed as deliverers. The nominal ruler of Egypt at that time was El-Adid, the Fatimite Caliph, and he made Saladin his Vizier, little thinking that that modest officer would soon supplant him. So efficiently did Saladin administer the country that in a few months it had regained its prosperity, despite the five years' devastating war which had preceded. At this juncture the traveller Rabbi Benjamin came to Egypt. Some three years earlier he had left his native place--Tudela, on the Ebro in the north of Spain. After passing through the prosperous towns which lie on the Gulf of Lyons, he visited Rome and South Italy. From Otranto he crossed over to Corfu, traversed Greece, and then came to Constantinople, of which he gives an interesting account. Very telling, for example, are the words: "They hire from amongst all nations warriors called Barbarians to fight with the Sultan of the Seljuks; for the natives are not warlike, but are as women who have no strength to fight." After visiting the Islands of the Aegean, as well as Rhodes and Cyprus, he passed on to Antioch, and followed the well-known southern route skirting the Mediterranean, visiting the important cities along the coast, all of which were then in the hands of the Franks.