More liberal views, and even Karaism, found a way into the halls of learning, just as mysticism had done before. Through these opposed views quarrels naturally arose, which came to light when the office of Exilarch was to be filled. In the year 825 there was to be the election of a new Prince of the Exile. For this office there were two candidates, David ben Judah and Daniel. The latter was inclined to Karaism, and perhaps just on this account found in southern Babylonia many supporters who gave him their votes. The Babylonians in the north, who belonged to Pumbeditha (Anbar), decided in favor of David, as he doubtless belonged to the orthodox party. The quarrel was carried on with much virulence. The mystic Abraham ben Sherira was deposed in consequence, and Joseph ben Chiya appointed in his place. It is not known by which party this was brought about. But Abraham had followers in Pumbeditha, who gave him their support, and refused allegiance to the rival Gaon. The quarrel could not be decided by their own authorities, and both parties appealed to the Caliph Almamun to confirm the Exilarch of their choice. Almamun, however, at that time was engaged in a dispute about the Eastern Church. He had been called upon to decide between two claimants for the Chaldæo-Christian Patriarchate, and wanted to rid himself of such litigation. He therefore declined to interfere in the internal affairs of the Jews and Christians, and decreed that in future each party should be empowered to elect its own religious chief. If ten Jews wished to elect an Exilarch, ten Christians an Archbishop, or ten Fire-worshipers a Chief Priest, they had the power to do so. This decree was unsatisfactory to both parties, inasmuch as it left the quarrel undecided; it is not certain how it ended. So much, however, is known: David ben Judah asserted his authority, and filled the post for about ten years (till 840). In the school of Sora also quarrels broke out (827). The quarrel between the chiefs lasted for a long time in the school of Pumbeditha. Eventually a compromise was effected. There were to be two Gaons holding office together, who should share equally the title and the revenue. Abraham, however, was to have the privilege of delivering the address at the general assemblies. One day both heads of the school at Pumbeditha met in Bagdad at an installation ceremony, at which it was customary to give an address. The capital of the Caliphate had at this time a numerous Jewish community and several synagogues. Bagdad, which was nearer to Pumbeditha than to Sora, belonged to the district of the School of Pumbeditha. Its president was there given the preference to him of Sora.