Within the limits of the supernatural explanation the interest centred more and more in a single point: the oracles. As far back as in Aquinas, “false prophecy” is a main section in the chapter on demons, whose power to foretell the future he expressly acknowledges. In the sixteenth and seventeenth centuries, when the interest in the prediction of the future was so strong, the ancient accounts of true prognostications were the real prop of demonology. Hence demons generally play a great part in these explanations, even though in other cases the Devil fills the bill. Thus Acosta in his account of the American religions; thus Voss and numerous other writers of the seventeenth century; and it is hardly a mere accident, one would think, when Milton specially mentions Dodona and Delphi as the seats of worship of the Greek demons. Among a few of the humanists we certainly find an attempt to apply the natural explanation even here; thus Caelius Rhodiginus asserted that a great part (but not all!) of the oracular system might be explained as priestly imposture, and his slightly younger contemporary Caelius Calcagninus, in his dialogue on oracles, seems to go still further and to deny the power of predicting the future to any other being than the true God. An exceptional position is occupied by Pomponazzi, who in his little pamphlet _De Incantationibus_ seems to wish to derive all magic, including the oracles, from natural causes, though ultimately he formally acknowledges demonology as the authoritative explanation. But these advances did not find acceptance; we find even Voss combating the view on which they were founded. It is characteristic of the power of demonology in this domain that in support of his point of view he can quote no less a writer than Machiavelli. The author who opened battle in real earnest against demonology was a Dutch scholar, one van Dale, otherwise little known. In a couple of treatises written about the close of the seventeenth century he tried to show that the whole of idolatry (as well as the oracles in particular) was not dependent on the intervention of supernatural beings, but was solely due to imposture on the part of the priests. Van Dale was a Protestant, so he easily got over the unanimous recognition of demonology by the Fathers of the Church. The accounts of demons in the Old and New Testaments proved more difficult to deal with; it is interesting to see how he wriggles about to get round them—and it illustrates most instructively the degree to which demonology affords the only reasonable and natural explanation of paganism on the basis of early Christian belief.