The publicity given to the recent attacks on Psychic Photography has been out of all proportion to their scientific value as evidence. When Sir Arthur Conan Doyle returned to Great Britain, after his successful tour in America, the controversy was in full swing. With characteristic promptitude he immediately decided to meet these negative attacks by a positive counter-attack, and this volume is the outcome of that decision.

We have used the term “Spirit Photography” on the title-page as being the popular name by which these phenomena are known. This does not imply that either Sir Arthur or I imagine that everything supernormal must be of spirit origin. There is, undoubtedly, a broad borderland where these photographic effects may be produced from forces contained within ourselves. This merges into those higher phenomena of which many cases are here described. Those desiring fuller information on this subject are referred to “Photographing the Invisible,” by James Coates.

It was only when editing the matter for these pages that I fully realised what an overwhelming mass of reliable material we had to work upon. In restricting this book to the necessary limits it has only been possible to make use of a small portion of this evidence. Many more cases have been placed on record and may be published on some future occasion. Most of the letters accompanying these descriptions display a deep and genuine affection for the maligned mediums of the Crewe Circle. Our hearty thanks are due to all those friends who have so readily co-operated in this work and who are so willing to brave the discomforts of publicity for what they know to be the truth.