than as the spirit immanent in it. The process of thought which leads to the change from the one mode of conception to the other is anthropomorphism, or the gradual investment of the immanent spirits with more and more of the attributes of humanity. As men emerge from savagery the tendency to humanise their divinities gains strength; and the more human these become the wider is the breach which severs them from the natural objects of which they were at first merely the animating spirits or souls. But in the progress upwards from savagery men of the same generation do not march abreast; and though the new anthropomorphic gods may satisfy the religious wants of the more developed intelligences, the backward members of the community will cling by preference to the old animistic notions. Now when the spirit of any natural object such as the corn has been invested with human qualities, detached from the object, and converted into a deity controlling it, the object itself is, by the withdrawal of its spirit, left inanimate; it becomes, so to say, a spiritual vacuum. But the popular fancy, intolerant of such a vacuum, in other words, unable to conceive anything as inanimate, immediately creates a fresh mythical being, with which it peoples the vacant object. Thus the same natural object comes to be represented in mythology by two distinct beings: first by the old spirit now separated from it and raised to the rank of a deity; second, by the new spirit, freshly created by the popular fancy to supply the place vacated by the old spirit on its elevation to a higher sphere. In such cases the problem for mythology is, having got two distinct personifications of the same object, what to do with them? How are their relations to each other to be adjusted, and room found for both in the mythological system? When the old spirit or new deity is conceived as creating or producing the object in question, the problem is easily solved. Since the object is believed to be produced by the old spirit, and animated by the new one, the latter, as the soul of the object, must also owe its existence to the former; thus the old spirit will stand to the new one as producer to produced, that is, in mythology, as parent to child, and if both spirits are conceived as female, their relation will be that of mother and daughter. In this way, starting from a single personification of the corn as female, mythic fancy might in time reach a double personification of it as mother and daughter. It would be very rash to affirm that this was the way in which the myth of Demeter and Persephone actually took shape; but it seems a legitimate conjecture that the reduplication of deities, of which Demeter and Persephone furnish an example, may sometimes have arisen in the way indicated. For example, among the pairs of deities dealt with in a former part of this work, it has been shown that there are grounds for regarding both Isis and her companion god Osiris as personifications of the corn. On the hypothesis just suggested, Isis would be the old corn-spirit, and Osiris would be the newer one, whose relationship to the old spirit was variously explained as that of brother, husband, and son; for of course mythology would always be free to account for the coexistence