On every side we find, as we try to show, in all ages, climates, races, and stages of civilisation, consentient testimony to a set of extraordinary phenomena. Equally diffused we find fraudulent imitations of these occurrences, and, on one side, a credulity which has accepted everything, on the other hand, a scepticism which denies and laughs at all the reports. But it is a question whether human folly would, everywhere and always, suffer from the same delusions, undergo the same hallucinations, and elaborate the same frauds. The problem is one which, in other matter, always haunts the student of man's development: he is accustomed to find similar myths, rites, customs, fairy tales, all over the world; of some he can trace the origin to early human imagination and reason, working on limited knowledge; about others, he asks whether they have been independently evolved in several places, or whether they have been diffused from a single centre. In the present case, the problem is more complicated. Taboos, totemism, myths explanatory of natural phenomena, customs like what, with Dr. Murray's permission, we call the Couvade, are either peculiar to barbarous races, or, among the old civilised races, existed as survivals, protected by conservative Religion. But such things as 'clairvoyance,' 'levitation,' 'veridical apparitions,' 'movements of objects without physical contact,' 'rappings,' 'hauntings,' persist as matters of belief, in full modern civilisation, and are attested by many otherwise sane, credible, and even scientifically trained modern witnesses. In this persistence, and in these testimonies, the alleged abnormal phenomena differ from such matters as nature-myths, customs like Suttee, Taboo, Couvade, and Totemism, the change of men into beasts, the raising of storms by art-magic. These things our civilisation has dropped, the belief in other wild phenomena many persons in our civilisation retain.