"A large part of the material used in this book was sent to the authors as representatives of the Society for psychical research; and the book is published with the sanction of the council of that society... Mr. Myers is solely responsible for the Introduction, and for the ʻNote on a suggested mode of psychical interaction.'... and Mr. Gurney... for the remainder of the book... The collection, examination, and appraisal of the evidence--has been a joint labor, of which Mr. Podmore has borne... a share."--Preface.