And some say that plagues, and hail-storms, and tempests, and the like, are wont to take place, not alone in consequence of material disturbance, but also through anger of demons and bad angels. For instance, they say that the Magi at Cleone, watching the phenomena of the skies, when the clouds are about to discharge hail, avert the threatening of wrath by incantations and sacrifices. And if at any time there is the want of an animal, they are satisfied with bleeding their own finger for a sacrifice. The prophetess Diotima, by the Athenians offering sacrifice previous to the pestilence, effected a delay of the plague for ten years. The sacrifices, too, of Epimenides of Crete, put off the Persian war for an equal period. And it is considered to be all the same whether we call these spirits gods or angels. And those skilled in the matter of consecrating statues, in many of the temples have erected tombs of the dead, calling the souls of these Dæmons, and teaching them to be worshipped by men; as having, in consequence of the purity of their life, by the divine foreknowledge, received the power of wandering about the space around the earth in order to minister to men. For they knew that some souls were by nature kept in the body. But of these, as the work proceeds, in the treatise on the angels, we shall discourse.