Nor need it surprise us to find traditions perpetuated for thousands upon thousands of years, especially among a people having a religious priesthood. The essence of religion is conservatism; little is invented; nothing perishes; change comes from without; and even when one religion is supplanted by another its gods live on as the demons of the new faith, or they pass into the folk-lore and fairy stories of the people. We see Votan, a hero in America, become the god Odin or Woden in Scandinavia; and when his worship as a god dies out Odin survives (as Dr. Dasent has proved) in the Wild Huntsman of the Hartz, and in the Robin Hood (Oodin) of popular legend. The Hellequin of France becomes the Harlequin of our pantomimes. William Tell never existed; he is a myth; a survival of the sun-god Apollo, Indra, who was worshipped on the altars of Atlantis. "Nothing here but it doth change into something rich and strange." The rite of circumcision dates back to the first days of Phoenicia, Egypt, and the Cushites. It, too, was probably an Atlantean custom, invented in the Stone Age. Tens of thousands of years have passed since the Stone Age; the ages of copper, bronze, and iron have intervened; and yet to this day the Hebrew rabbi performs the ceremony of circumcision with a stone knife. Frothingham says, speaking of St. Peter's Cathedral, in Rome: "Into what depths of antiquity the ceremonies carried me back! To the mysteries of Eleusis; to the sacrificial rites of Phoenicia. The boys swung the censors as censors had been swung in the adoration of Bacchus. The girdle and cassock of the priests came from Persia; the veil and tonsure were from Egypt; the alb and chasuble were prescribed by Numa Pompilius; the stole was borrowed from the official who used to throw it on the back of the victim that was to be sacrificed; the white surplice was the same as described by Juvenal and Ovid." Although it is evident that many thousands of years must have passed since the men who wrote in Sanscrit, in Northwestern India, could have dwelt in Europe, yet to this day they preserve among their ancient books maps and descriptions of the western coast of Europe, and even of England and Ireland; and we find among them a fuller knowledge of the vexed question of the sources of the Nile than was possessed by any nation in the world twenty-five years ago. This perpetuation of forms and beliefs is illustrated in the fact that the formulas used in the Middle Ages in Europe to exorcise evil spirits were Assyrian words, imported probably thousands of years before from the magicians of Chaldea. When the European conjurer cried out to the demon, "Hilka, hilka, besha, besha," he had no idea that he was repeating the very words of a people who had perished ages before, and that they signified Go away, go away, evil one, evil one. (Lenormant, "Anc. Hist. East," vol. i., p. 448.)