Here we find Achilles in the moment of inferring from his dream the actual existence of a spirit surviving the death of the body. No doubt a belief in ghosts might well have been developed by early thinkers, as Mr. Tylor holds, out of arguments like these of Achilles. It is certain, too, that many of the social and religious institutions of savages (if writers in the English language are to be allowed the use of that word) have been based on the opinion that the spirits of the dead are still active among the living. All this branch of the subject has been exhaustively treated by Mr. Tylor in his _Primitive Culture_. But I do not observe that Mr. Tylor has paid very much attention to what we may call the actual ghost stories of savages—that is, the more or less well-authenticated cases in which savages have seen the ordinary ghost of modern society. Here, for the purposes of clearness, I will discriminate certain kinds of ghost stories, all of them current among races as low as the Australians, and lower than the Fijians, all of them current, too, in contemporary European civilisation. First, let us place the well-known savage belief that the spirits of the dead reappear in the form of the lower animals often of that animal which is the totem or ancestral friend and guardian of the kinship. This kind of ghost story one seldom or never hears in drawing-rooms, but it is the prevalent and fashionable kind among the peasantry for example, in Shropshire. In the second class, we may reckon the more or less professional ghosts that appear obedient to the medium’s or conjurer’s command at _séances_. These spirits, which come “when you do call them,” behave in much the same manner, and perform the same sorts of antics or miracles, in Australian _gunyehs_, in Maori _pahs_, and at the exhibition of Mr. Sludge, or of the esoteric Buddhists. Thirdly, we arrange the non-professional ghost, which does not come at the magician’s call, but appears unexpected, and apparently irresponsible. This sort also haunts houses and forests; other members of the species manifest themselves at the moment of death, or become visible for the purpose of warning friends of their own approaching decease. Such phenomena as a sudden flash of supernatural light, or the presence of a white bird, or other ghostly creatures prophesying death, may perhaps be allotted to this class of apparitions.