accumulation of myths is spontaneously formed—each legend being merely the material expression of a moral fact. The simple love of the wonderful, and the complete absence of all critical spirit, aid the formation. In this manner we find that in certain stages of society, and under the action of the influences I have stated, an accretion of miraculous legends is naturally formed around prominent personages or institutions. We look for them as we look for showers in April, or for harvest in autumn. We can very rarely show with any confidence the precise manner in which a particular legend is created or the nucleus of truth it contains, but we can analyse the general causes that have impelled men towards the miraculous; we can show that these causes have never failed to produce the effect, and we can trace the gradual alteration of mental conditions invariably accompanying the decline of the belief. When men are destitute of critical spirit, when the notion of uniform law is yet unborn, and when their imaginations are still incapable of rising to abstract ideas, histories of miracles are always formed and always believed, and they continue to flourish and to multiply until these conditions have altered. Miracles cease when men cease to believe and to expect them. In periods that are equally credulous, they multiply or diminish in proportion to the intensity with which the imagination is directed to theological topics. A comparison of the histories of the most different nations shows the mythical period to have been common to all; and we may trace in many quarters substantially the same miracles, though varied by national characteristics, and with a certain local cast and colouring. As among the Alps the same shower falls as rain in the sunny valleys, and as snow among the lofty peaks, so the same intellectual conceptions which in one moral latitude take the form of nymphs, or fairies, or sportive legends, appear in another as dæmons or appalling apparitions. Sometimes we can discover the precise natural fact which the superstition had misread. Thus, epilepsy, the phenomenon of nightmare, and that form of madness which leads men to imagine themselves transformed into some animal, are, doubtless, the explanation of many tales of demoniacal possession, of incubi, and of lycanthropy. In other cases we may detect a single error, such as the notion that the sky is close to the earth, or that the sun revolves around the globe, which had suggested the legend. But more frequently we can give only a general explanation, enabling us to assign these legends to their place, as the normal expression of a certain stage of knowledge or intellectual power; and this explanation is their refutation. We do not say that they are impossible, or even that they are not authenticated by as much evidence as many facts we believe. We only say that, in certain conditions of society, illusions of the kind inevitably appear. No one can prove that there are no such things as