[Sidenote: Modifications of supernaturalism.] These supernatural notions were at different times modified by two intrusive elements, the first being the Perso-Arabic just alluded to, the second derived from the north of Europe. This element was witchcraft; for, though long before, among Hebrews, Greeks, and Romans, decrepit women were known as witches--as the Thessalian crone who raised a corpse from the dead for Sextus by lashing it with a snake--it was not until a later period that this element was fairly developed. [Sidenote: The persecutions for witchcraft.] A bull of Pope Innocent VIII., published A.D. 1484, says, "It has come to our ears that numbers of both sexes do not avoid to have intercourse with the infernal fiends, and that by their sorceries they afflict both man and beast. They blight the marriage-bed; destroy the births of women and the increase of cattle; they blast the corn on the ground, the grapes in the vineyard, the fruits of the trees, and the grass and herbs of the field." At this time, therefore, the head of the Church had not relinquished a belief in these delusions. The consequences of the punishment he ordained were very dreadful. In the valleys of the Alps many hundred aged women were committed to the flames under an accusation of denying Christ, dishonouring the crucifix, and solemnizing a devil's sabbath in company with the fiend. Such persecutions, begun by papal authority, continued among illiterate zealots till late times, and, as is well known, were practised even in America. Very masculine minds fell into these delusions. Thus Luther, in his work on the abuses attendant on private masses, says that he had conferences with the Devil on that subject, passing many bitter nights and much restless and wearisome repose; that once, in particular, Satan came to him in the dead of the night, when he was just awakened out of sleep. [Sidenote: Experiences of Luther.] "The Devil," says Luther, "knows well enough how to construct his arguments, and to urge them with the skill of a master. He delivers himself with a grave and yet with a shrill voice. Nor does he use circumlocutions and beat about the bush, but excels in forcible statements and quick rejoinders. I no longer wonder that the persons whom he assails in this way are occasionally found dead in their beds. He is able to compress and throttle, and more than once he has so assaulted me and driven my soul into a corner that I have felt as if the next moment it must leave my body. I am of opinion that Gesner and OEcolampadius came in that manner to their deaths. The Devil's manner of opening a debate is pleasant enough, but he soon urges things so peremptorily that the respondent in a short time knows not how to acquit himself."