The Saracens long maintained the policy adopted in the conquest and made no attempt to convert their Christian subjects, just as in the Levantine provinces the Christians, although oppressed, were allowed to retain their religion, and in Persia, after the fall of the Sassanids, Parsism continued to exist for centuries and only died out gradually.[129] In fact, the condition of the Mozárabes, or subject Christians, under the caliphs of Córdova was, for the most part, preferable to what it had been under the Gothic kings. Mozárabes were frequently in command of the Moslem armies; they formed the royal body-guard and were employed as secretaries in the highest offices of state. In time they so completely lost the Latin tongue that it became necessary to translate the scripture and the canons into Arabic.[130] The Church organization was maintained, with its hierarchy of prelates, who at times assembled in councils; there was sufficient intellectual activity for occasional heresies to spring up and be condemned, like those of Hostegesis and Migetio in the ninth century, while, half a century earlier, the bull of Adrian I, addressed to the orthodox bishops of Spain and denouncing the Adoptianism of Felix of Urgel, which was upheld by Elipandus, Archbishop of Toledo, shows the freedom of intercourse existing between the Mozárabes and the rest of Christendom.[131] We hear of S. Eulogio of Córdova, whose two brothers, Alvar and Isidor, had left Spain and taken service with the Emperor Louis le Germanique; he set out in 850 to join them, but was stopped at Pampeluna by war and returned by way of Saragossa, bringing with him a number of books, including Virgil, Horace, Juvenal, Porphyry, the epigrams of Aldhelm and the fables of Avienus.[132] Mixed marriages seem not to have been uncommon and there were frequent instances of conversion from either faith, but Mozárabic zealots abused the Moslem tolerance by publicly decrying Islam and making proselytes, which was forbidden, and a sharp persecution arose under Abderrhaman II and Mahomet I, in which there were a number of victims, including San Eulogio, who was martyred in 859.[133] [Sidenote: _THE MOZÁRABES_]