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 for its firm adherence to the national religion. On his accession Ardeshír undertook the restoration of the Avesta, a great part of which had been neglected or altogether lost, and under the supervision of the Magi he caused a purification or reformation of the faith of Zarathushtra to be begun. This work was continued by his successors, but, as no canon of scripture had been formed, there were many conflicting sects, and not until the reign of Sapor II (c. 330) was the text of the sacred book fixed beyond dispute. Then Adarbâd, a holy man, produced his recension of the Avesta among the assembled Magi, and offered to submit himself to the ordeal of fire in proof of its strict orthodoxy. Molten brass was poured upon his breast, he passed the test unscathed, and his reading of the tenets of Mazdeism was never afterwards contested. *