Note 613 — Chapter L · THE OMEYYAD AND ABBASSIDE DYNASTIES, AND CONCLUSION.
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Their bigotry is conspicuous mostly in matters of purification, a remnant, probably, of their ancient faith. Baths and mosques are held polluted by the presence of an infidel. It is curious, also, that the Persians to this day curse the memory of Al Mâmûn, and accuse him of poisoning his Alyite son-in-law; curiously enough, using his name as a term of abuse.