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 state of Egypt they were minimised because political considerations rendered it expedient to conciliate orthodox Muslim opinion. And in the Assassins, confined, it seems, to the higher grades of the initiates, they produced a rich intellectual development, though allied to a system which shows fanaticism unscrupulously used by the leaders that they might live out their lives in a philosophical seclusion, protected from the dangers which surrounded them.

Before leaving this particular subject, which shows the promulgation of philosophy as an esoteric creed, we must refer to a society known as the Ikhwanu s-Safa or "the brotherhood of purity." We do not know what its connection with 'Abdullah b. Maymun's sect may have been beyond the fact that they were contemporary and of kindred aims, but it certainly seems that there was some connection: it has been suggested that this brotherhood represents the original teaching of Abdullah's sect. It was divided into four grades, but its doctrines were promulgated freely at an early date, though we do not know whether this general divulging of its teaching was part of the original plan or forced upon it by circumstances. It appears openly about 360, some hundred years after Abdullah founded his sect, shortly after the Fatimites had conquered Egypt and some time after the Qarmatians had returned the sacred black stone which they had stolen from the "House of God" at Mecca. It seems tempting to suggest that it may have been a reformation of