Savage hypnotism and 'suggestion,' among the Sioux and Arapahoe, has been thought worthy of a whole volume in the Reports of the Ethnological Bureau of the Smithsonian Institute (Washington, U.S., 1892-98). Republican Governments publish scientific matter 'regardless of expense,' and the essential points might have been put more shortly. They illustrate the fact that only certain persons can hypnotise others, and throw light on some peculiarities of _rapport._[3] In brief, savages anticipated us in the modern science of experimental psychology, as is frankly acknowledged by the Society for Experimental Psychology of Berlin. 'That many mystical phenomena are much more common and prominent among savages than among ourselves is familiar to everyone acquainted with the subject. The _ethnological_ side of our inquiry demands penetrative study.'[4] That study I am about to try to sketch. My object is to examine some 'superstitious practices' and beliefs of savages by aid of the comparative method. I shall compare, as I have already said, the ethnological evidence for savage usages and beliefs analogous to thought-transference, coincidental hallucinations, alternating personality, and so forth, with the best attested modern examples, experimental or spontaneous. This raises the question of our evidence, which is all-important. We proceed to defend it. The savage accounts are on the level of much anthropological evidence; they may, that is, be dismissed by adversaries as 'travellers' tales.' But the best testimony for the truth of the reports as to actual belief in the facts is the undesigned coincidence of evidence from all ages and quarters.[5] When the stories brought by travellers, ancient and modern, learned and unlearned, pious or sceptical, agree in the main, we have all the certainty that anthropology can offer. Again, when we find practically the same strange neglected sparks, not only rumoured of in European popular superstition, but attested in many hundreds of depositions made at first hand by respectable modern witnesses, educated and responsible, we cannot honestly or safely dismiss the coincidence of report as indicating a mere 'survival' of savage superstitious belief, and nothing more.