“Houdini of world wide fame, previously mentioned, has for years demonstrated dematerialization, and the passage of matter through matter upon the public platform, while Mrs. Thompson of America, has demonstrated materialization. Mrs. Zancig has, with her husband, publicly exhibited her psychic gift, called ‘thought transference,’ which is purely soul projection, in all the leading world centres. Miss Fay, and several well known Japanese mediums, for years demonstrated the passage of matter through matter, and also materialization. These are only a few of the many who might be mentioned, who demonstrate psychic gifts before the public. Such public mediums do not, of course, advertise themselves as performing their wonders by occult powers, or through the help of spirits, and the public are therefore left in ignorance of how they perform their marvelous tricks, as they are called. The author has tested each of those mentioned, by a personal experiment from the stage, and several also in private, and can testify that they are mediums, performing most, if not all of their great wonders by spirit agency. They are naturally reluctant to acknowledge the fact, for the music-hall public would instantly resent any claims they might make that they performed their wonders by spirit power. Their audiences would regard such claims as ‘bunkum,’ and probably subject them to insult, if not to ill treatment, for the general public are entirely ignorant of such possibilities in the manipulation of psychical matter as related in this book, which a medium can develop with the co-operation of spirit entities. It can be left to the reader’s imagination to picture the face of a music-hall manager if he were asked to allow upon the stage a demonstration of spirit powers. Horrors! The poor man would not be able to sleep for nights if he thought ghosts were working around his buildings or upon his stage. Thus, knowing the attitude of men toward such things these wonders of wonders are produced upon the music-hall stage as clever ‘mystery’ tricks. The author does not wish his readers to suppose that the mechanical sleight-of-hand tricks carried out by Maskelyne and Devant and similar operators, have anything to do with the mediumistic gift, for they are a mechanical copy of true magic. These tricks are performed with tons of machinery, whereas the genuine medium can produce his wonders, if necessary, naked and in an empty room.