With the decay of the Exilarchate and of the school of Sora, Asia lost the leadership of Judaism. If Pumbeditha, under Aaron Ibn-Sarjadu, flattered itself that it possessed the supremacy, it was deceived. After Ibn-Sarjadu's death, internal quarrels prepared for its destruction. Nehemiah, the son of Kohen-Zedek, who had been the rival of Ibn-Sarjadu, but had not met with success, obtained the post of head of the school through cunning (960). The college, however, led by the chief Judge Sherira ben Chananya, opposed him. There were a few members and rich laymen who supported Nehemiah, but his opponents refused to recognize him during the whole period of his office (960-968). During the time that the two parties were contending for the Gaonate of Pumbeditha, and with it for the religious authority over the Jews, the four men who had been sent from Sora to collect contributions from the various communities, and who had been taken captive, had founded new schools in Egypt, Africa (Kairuan), Spain and France, and thereby separated these communities from the Gaonate. These four men who caused the seeds of the Talmudic spirit to blossom in various places were: Shemaria ben Elchanan, who was sold by the admiral Ibn-Rumahis in Alexandria, and then being ransomed by the Jewish community, finally reached Misr (Cairo). The second was Chushiel, who was sold on the coast of Africa, and came to Kairuan. The third was probably Nathan ben Isaac Kohen, the Babylonian, who perhaps reached Narbonne. The fourth was Moses ben Chanoch, who underwent more dangers than the other three. He was the only one of the four who was married. His beautiful and pious wife and his young son had accompanied him on his journey, and were taken prisoners together with him. Ibn-Rumahis had set eyes upon the beautiful woman, and designed to violate her. The wife, however, asked her husband in Hebrew whether those that were drowned could hope for resurrection, and when he answered in the affirmative, and confirmed his answer by a verse from the Bible, she threw herself into the sea and was drowned. In deep sorrow and in the garb of the slave, Moses ben Chanoch with his little son was carried to Cordova, where he was ransomed by the Jewish community. They did not imagine that with him Spain obtained the supremacy over the Jews of all other countries. Moses did not betray his deep knowledge of the Talmud to the community into whose midst he had been cast, so that he might not derive any advantage from his knowledge of the Law. He, therefore, at first behaved like any ordinary captive. Moses soon made his way to the school of Cordova, the president of which was Nathan. He was a rabbi and also judge, and possessed but slight Talmudical knowledge, but was regarded as a shining light in Spain. Moses sat near the door in the corner like an ignorant listener. But when he perceived that Nathan, in expounding a passage in the Talmud, made a childish mistake,