does not stand on the roll of the Khalifate as usually reckoned. It shows some Shi'ite tinge when the historian says, "In the Khalifate of al-Hasan," and, thereafter, proceeds with, "In the days of Mu'awiya," the Umayyad Khalifa who followed him. Mu'awiya had received the allegiance of the Syrian Muslims and when he advanced on al-Kufa, where al-Hasan was, al-Hasan met him and gave over into his hands all his supposed rights. That was in A.H. 41; in A.H. 49 he was dead by poison. Twelve years later al-Husayn, his brother, and many of his house fell at Karbala in battle against hopeless odds. It is this last tragedy that has left the deepest mark of all on the Muslim imagination. Yearly when the fatal day, the day of Ashura, the tenth of the month Muharram, comes round, the story is rehearsed again at Karbala and throughout, indeed, all the Shi'ite world in what is a veritable Passion Play. No Muslim, especially no Persian, can read of the death of al-Husayn, or see it acted before his eyes, without quivering and invoking the curse of God upon all those who had aught to do with it or gained aught by it. That curse has clung fast through all the centuries to the name of Yazid, the Umayyad Khalifa of the time, and only the stiffest theologians of the traditional school have labored to save his memory through the merits of the historical Khalifate. But even after this tragedy it was not out with the blood of Muhammad. Many descendants were left and their party lived on in strange, half underground fashion, as sects do in the East, occasionally coming to the surface and bursting out in wild and, for long, useless rebellion.

In these revolts the Shi'a was worthy of its name, and split into many separate divisions, according to the individuals of the house of Ali to whom allegiance was rendered and who were regarded as leaders, titular or real. These subdivisions differed, also, in the principle governing the choice of a leader and in the attitude of the people toward him. Shi'ism, from being a political question, became theological. The position of the Shi'ite was and is that there must be a law (nass) regulating the choice of the Imam, or leader of the Muslim community; that that law is one of the most important dogmas of the faith and cannot have been left by the Prophet to develop itself under the pressure of circumstances; that there is such an Imam clearly pointed out and that it is the duty of the Muslim to seek him out and follow him. Thus there was a party who regarded the leadership as belonging to Ali himself, and then to any of his descendants by any of his wives. These attached themselves especially to his son Muhammad, known from his mother as Muhammad ibn al-Hanafiya, who died in 81, and to his descendants and successors. It was in this sect that the most characteristic Shi'ite views first developed. This Muhammad seems to have been the first concerning whom it was taught, after his death, that he was being preserved by God alive in retirement and would come forth at his appointed time to bring in the rule of righteousness upon the earth. In some of the innumerable sub-sects the doctrine of the deity, even, of Ali was early held, in others a doctrine of metempsychosis, generally among men and especially from one Imam to