worship of Mithra, and, above all, of the Egyptian divinities, attracted their thousands, and during more than three centuries the Roman writings are crowded with allusions to their progress. The mysteries of the Bona Dea,(732) the solemn worship of Isis, the expiatory rites that cleansed the guilty soul, excited a very delirium of enthusiasm. Juvenal describes the Roman women, at the dawn of the winter day, breaking the ice of the Tiber to plunge three times into its sacred stream, dragging themselves on bleeding knees in penance around the field of Tarquin, offering to undertake pilgrimages to Egypt to seek the holy water for the shrine of Isis, fondly dreaming that they had heard the voice of the goddess.(733) Apuleius has drawn a graphic picture of the solemn majesty of her processions, and the spell they cast upon the most licentious and the most sceptical.(734) Commodus, Caracalla, and Heliogabalus were passionately devoted to them.(735) The temples of Isis and Serapis, and the statues of Mithra, are among the last prominent works of Roman art. In all other forms the same credulity was manifested. The oracles that had been silent were heard again; the astrologers swarmed in every city; the philosophers were surrounded with an atmosphere of legend; the Pythagorean school had raised credulity into a system. On all sides, and to a degree unparalleled in history, we find men who were no longer satisfied with their old local religion, thirsting for belief, passionately and restlessly seeking for a new faith.