_Not that all trance patients are lucid, any more than all brown studies result in brilliant ideas; nor should it be claimed that some measure of lucidity, even of the ultra-normal kind now under consideration, cannot exist without complete bodily trance. The phenomenon called "automatic writing" is an instance to the contrary,--when a hand liberated from ordinary conscious control is found, automatically as it were, to be writing sentences, sometimes beyond the knowledge of the person to whom the hand belongs. Some approach to unconsciousness, however, either general or local, seems essential to the access of the state, and such conditions as ordinarily induce reverie or sleep are suitable for bringing it on; no one, for instance, would expect to experience it while urgently occupied in affairs. Whether it is desirable to give way to so unpractical an attitude, and to encourage the influx of ideas through non-sensory channels, is another question which need not now concern us. It suffices for us that the phenomenon exists, and that it occasionally though very rarely takes on so well marked and persistent a form as to lend itself to experimental investigation. It is true that in these cases nothing of exceptional and world-compelling merit is produced; the substance of the communication is often, though not always, commonplace, and the form sometimes grotesque. It is true also that a complete record of a conversation held under these circumstances--perhaps a full record of a commonplace conversation held under any circumstances--readily lends itself to cheap ridicule; nevertheless, the evidence of intimate knowledge thus displayed becomes often of extreme interest to the few persons for whom the disjointed utterances have a personal meaning, although to the outsider they must appear dull, unless he is of opinion that they help him to interpret the more obscure workings of the human mind, or unless he thinks it possible that the nature and meaning of inspiration in general may become better understood by a study of this, its lowest, but at the same time its most definite and controllable, form. Undoubtedly information is attainable under these conditions from sources unknown, undoubtedly the entranced or semi-conscious body or part of a body has become a vehicle or medium for ostensible messages from other intelligences, or for impersonations; but the cause of the lucidity so exhibited, the nature of the channel by which the information is obtained, and the source of the information itself, are questions which, although they are apt to be treated glibly by a superficial critic, to whom they appear the most salient feature and the easiest of explanation, are really the most difficult of all._ _It was to study such questions as this that a special society--the Society for Psychical Research--was founded some twenty-two years ago._