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 to Ja'far as-Sadiq. The initiate was then taught that the true meaning could not be discovered by private interpretation but needed an authoritative teacher, the Imam, or, as he had disappeared, his accredited representative, the Mahdi 'Abdullah, son of Maymun. In the higher grades the disciple had this inner meaning of the Qur'an disclosed to him, and this proved to be substantially the Aristotelian and neo-Platonic doctrine in general outline, together with certain oriental elements derived from Zoroastrianism and Masdekism. These oriental elements figured chiefly in the doctrines taught to the intermediate grades, the higher ones attaining a pure agnosticism with an Aristotelian background. The sect thus formed spread, developed, and finally divided. It had a successful career in the Bahrayn or district near the junction of the two rivers, the Tigris and Euphrates, and there its followers were known as Qarmatians, after the name of a leading missionary. It met with success also in and around Aden, but we have no account of its subsequent history there. From Aden missionaries passed over to North Africa, where it had its chief success, and when Ubayd Allah, a descendant of 'Abdullah, passed over there an independent state was founded, with its capital at Kairawan (297 A.H.). From Kairawan a missionary propaganda was conducted in Egypt, then suffering from almost perennial misgovernment, and in the days of the deputy Kafur a definite invitation was sent by the Egyptian officials asking for the Khalif