Spirit, whether discarnate or incarnate, to manifest to our material senses must make use of matter—there must be a medium. A medium, or sensitive, is just as essential for psychic photography as for, say, automatic writing. As investigators are aware, in automatic script it frequently happens that along with communications from the “other side” come writings derived from the subconsciousness of the automatist, and such, I am convinced, is often the case in psychic photography. The subconscious is used to cover a multitude of theories. Certainly it is not an unfeasible explanation in some instances. Let me cite one case, which is typical of many. One of the members of the S.S.S.P.—Mr. Hobbs, of Purley, a keen business man—travelled to Crewe with his wife. They and the Crewe Circle were perfect strangers to each other. Mrs. Hobbs at the time was wearing a locket containing a photograph of their son, who had been killed in the war. This was tucked away out of sight in her blouse. The usual séance was held and to their great delight the visitors secured a picture of their boy. Trickery was impossible. Even supposing Mr. Hope had seen the photograph in the locket there was no time to produce a fraudulent result and foist this upon the alert sitters. A careful examination of the print, however, reveals the fact that the psychic picture is an exact but reversed duplicate of the photograph in the locket. Even the rim of the locket can be clearly seen. This sort of thing has occurred time and again. The image of the locket would be indelibly impressed on the memory of the mother, and it may well be that in some peculiar way the sensitive proved a medium for the projection of that conscious or subconscious image on to the photographic plate. Such an argument is not to be lightly dismissed, and the fact that the image obtained on the plate may not have been in the conscious mind of the sitter at the time does not necessarily affect the issue. I candidly admit that some such explanation may account for many of these curious effects. Sometimes the psychic pictures are facsimile copies of magazine covers and pictures no fraudulent medium would ever think of producing, and, like the faces in our dreams, they may come from the subconscious. At the same time, attempts to produce definite conscious thought-pictures, with the co-operation of a photographic medium, have almost always proved abortive in our experiments in this country. Some of the Continental members of the S.S.S.P., however, have concentrated on this line of research and have succeeded in obtaining thoughtgraphs which, more or less, resemble the object on which the thoughts of the subject have been intensely concentrated. These experiments, and, in particular, recent photographic experiments in connection with subjects under hypnosis, are yielding encouraging results.