These questions of fraud and imposture are naturally the first that suggest themselves when we begin to study these phenomena. But the slightest acquaintance with the life, habits and proceedings of the three or four great mediums of whom we are going to speak is enough to remove even the faintest shadow of suspicion. Of all the explanations conceivable, that one which attributes everything to imposture and trickery is unquestionably the most extraordinary and the least probable. Moreover, by reading Richard Hodgson’s report entitled, _Observations of certain Phenomena of Trance_ (_Proceedings_, Vols. VIII. and XIII.; and also J. H. Hyslop’s report, Vol. XVI.), we can observe the precautions taken, even to the extent of employing special detectives, to make certain that Mrs. Piper, for instance, was unable, normally and humanly speaking, to have any knowledge of the facts which she revealed. I repeat, from the moment that one enters upon this study, all suspicions are dispelled without leaving a trace behind them; and we are soon convinced that the key to the riddle must not be sought in imposture. All the manifestations of the dumb, mysterious and oppressed personality that lies concealed in every one of us have to undergo the same ordeal in their turn; and those which relate to the divining-rod, to name no others, are at this moment passing through the same crisis of incredulity. Less than fifty years ago, the majority of the hypnotic phenomena which are now scientifically classified were likewise looked upon as fraudulent. It seems that man is loth to admit that there lie within him many more things than he imagined. ----- 2