The Author's purpose of this book is to tell what he and others, under careful test conditions, have seen and heard in regard to psychic phenomena; many of the others are well equipped, trained observers. Funk is not attempting to discover anything; but is attempting to state clearly a problem and to urge others, better qualified, to the discovery of its solution. He did not pass upon the facts presented in this volume or attempt an explanation, but he wishes to urge as forcefully upon the scientific mind of the world what to him is a profound riddle.