Produced by Marcia Brooks, Suzanne Shell and the Online Distributed Proofreading Team at http://www.pgdp.net Whatever the defects or limitations of this story, I can assure my readers that it is largely based on truth. Many of the incidents, including the dual personality phenomena, were suggested by actual happenings known to me. The doctor who accomplishes cures by occult methods is a friend of mine, who lives and practises in New York City. Seraphine, the medium, is also a real person. The episode that is explained by waves of terror passing from one apartment to another and separately affecting three unsuspecting persons is not imaginary, but drawn from an almost identical happening tha…
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