It is obvious that such a body of men, pledged to impartial investigation, as the Society for Psychical Research could not officially stand sponsor to the speculative comments of M. Sage, however admittedly clear sighted and philosophical that French critic may be. The Society, indeed, is prepared to accept M. Sage's volume as a faithful and convenient résumé of experiments conducted under its own auspices, and so far as it contains statements of fact, these statements are quoted from authoritative sources. For the comments, deductions or criticisms therein contained, the acute intellect of M. Sage is alone responsible. It remains only to state in detail the principles on which the original text has been slightly abridged by the translator. No facts or comments have been left out that bear directly on the main subject of the book, the omissions are wholly of matters which might be regarded as superfluous for the understanding of the case of Mrs Piper.