Nevertheless, since I take for granted that supernatural phenomena are not what their producers would have us believe, and at the same time make no general attempt to prove their human origin, I must refer the reader to books on the subject, viz., _Studies in Psychical Research_, by the late Frank Podmore, which treats the spiritualists sympathetically and weakens occasionally in its unbelief; _Spiritualism and Sir Oliver Lodge_, by Dr. Charles Mercier, which is a direct and vigorous attack upon them; and _The Question_, by Edward Clodd, a book dealing with the subject historically from primitive man to 'Feda'. Stuart Cumberland, in _Spiritualism--the Inside Truth_, records some of the results of his vain search for spiritist phenomena that will bear investigation; and in _The Road to Endor_ the authors relate the story of a deliberate fraud that was accepted by their friends as a genuine manifestation. M. C. CONTENTS PREFACE INTRODUCTION I. THE UNCONSCIOUS II. COMPLEXES III. FORGETTING AND REPRESSION IV. DISSOCIATION V. WATER-DIVINING VI. SUGGESTION VII. HYPNOTISM VIII. DREAMS IX. HYSTERIA X. EXPERIMENTS, DOMESTIC AND OTHER XI. ABOUT MEDIUMS XII. THE ACCOUNTS OF BELIEVERS XIII. THE EVOLUTION OF THE MEDIUM CONCLUSION INTRODUCTION BY PROFESSOR LEONARD HILL, F.R.S. The body of man is made up of an infinite number of cells--minute masses of living substance--grouped into organs subserving particular functions, and held together by skeletal structures, bones and containing membranes such as the horny layer of the skin which are formed by the living cells. The whole is comparable to citizens grouped in farms and factories subserving one or other function necessary for the commonweal; and just as the city has its transport connecting the whole, distributing food and the various products of the factories, a drainage and scavenger system taking away the waste material, and a telephone system through which operations can be ordered and co-ordinated according to the needs of the commonweal, so has the body its blood circulation, digestive and excretive systems, and a co-ordinating nervous system. How small are the cells, how infinite their number is shown by the fact that each drop of blood the size of a pin's head contains five million red corpuscles; there are five or six pints of blood in the body!