It is all fundamentally a matter of testimony. We have, or we have not, a body of fact for which we are in debt to observation. The observation may be first hand--as in Sir Oliver Lodge's sittings where he reports what he saw and heard. It may be second hand as the cases reported in the larger part of the authoritative literature of psychic phenomena. (Second hand, that is, for the authors and those who depend upon them.) Trustworthy observation is probably more difficult here than in any region of investigation. The whole situation is unfavourable; low lights and high emotion, the instinctive tendency to read into the facts a desired content even in watching them, the possibility of hallucinations and forms of hypnosis, all combine to render human testimony unreliable and introduce errors of observation. Nowhere can we be less sure of our facts and even when the facts are admitted the interpretation of them still remains, and here the room for difference is equally great. At best we are dealing with forces not yet subdued to law, phenomena for which normal experience supplies no parallel. It is all a region of intimations and possible permissions, but never for a moment of inevitable conclusions. One must go slow enough in offering any opinion at all. The writer recognizes and accepts, to begin with, a preponderance of dependable testimony for physical phenomena not to be explained in terms of any force with which science is now familiar. In this he goes beyond Podmore who would eliminate all physical phenomena from the problem, and fully as far as Carrington. But Sir William Crookes never admitted entire error in this region,[76] and the conclusions of Geley (though he cites in part Eusapia Palladino, who is more or less discredited) point in the same direction. His studies of materialization are so vivid as to be uncanny and his photographs a series of documents which still await explanation.[77] There would seem to be a possible exercise of personal force not dependent upon muscular pull or pressure, bodily movements operating against known laws and even the building of this mysterious force into complete or fragmentary body-like forms. [Footnote 76: See Carrington, "The Physical Phenomena of Spiritualism," p. 377.] [Footnote 77: Geley, "From the Unconscious to the Conscious."] On the psychical side there is dependable evidence for information conveyed by supernormal means across considerable spaces--possibly long distances and the power to secure and report information not gained in any normal way. These are bare statements capable of great amplification. But they cover the ground. _Three Possible Explanations of So-Called Spiritistic Phenomena_