[14] The case of the Bombay Parsees is a curious instance in point. When this industrious and enterprising tribe, the descendants of the Persian fire-worshippers, flying from their native country before the Caliphs, arrived in Western India, they were admitted to toleration by the Hindoo sovereigns, on condition of not eating beef. When those regions afterwards fell under the dominion of Mahomedan conquerors, the Parsees obtained from them a continuance of indulgence, on condition of refraining from pork. What was at first obedience to authority became a second nature, and the Parsees to this day abstain both from beef and pork. Though not required by their religion, the double abstinence has had time to grow into a custom of their tribe; and custom, in the East, is a religion.