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 that I, myself, witnessed in Paris, France. And the truth about women that I have tried to tell has been largely obtained from women themselves, women in various walks of life, who have been kind enough to give me most of the opinions and experiences that are contained in Penelope's diary. To them I now gratefully dedicate this book.