"'In the foregoing I have confined myself as closely as possible to narrating how I conducted a photographic experiment open to every one to make, avoiding stating any hypothesis or belief of my own on the subject.'" Let us now return to some later experiments in psychic photography. Two small photographs, one showing a face, the other a series of small starlike markings, were sent to me by a member of the Society for the Study of Psychic Photography, of England. Writing of these prints, my correspondent says: "A week or so ago we distributed one hundred and ten strips of sensitive film, in light-tight packages, for friends of the members to 'wear.' This was done with the idea of ascertaining approximately what percentage of individuals possessed this gift. We agreed that the films should be carried about for a week, and where possible worn round the forehead at night. The experiment proved more successful than we had anticipated, since six out of the one hundred and ten films were more or less affected. The two best results are those shown on the prints enclosed herewith." (Not shown.) These results are quite in keeping with some that have lately been obtained in California. In a recent communication which I have received from Mr. Vincent Jones, Vice-President of the California Psychical Research Society,--under whose auspices the experiment was undertaken--he says:-- "Then we tried thought-photography. I bought some ordinary plates, which were opened in the dark-room of an X-ray laboratory. The plate was inclosed within an envelope of opaque black paper and this in another envelope. It was then suspended about twelve inches in front of the eyes of the sitting experimenter.... "This experimenter first wrote down on a slip of paper the thing he was going to concentrate on, folded it and handed it to a committee. Then he sat and concentrated for ten minutes. The plate was then developed, and contained the image, clear and strong and unmistakable, of a _cross_. This proved to be the subject handed to the committee." (See Fig. 3.) In view of the remarkable character of this experiment--as well as its importance, and taking into account the apparently excellent conditions under which the test was made, I wrote to Mr. Jones, asking him to be kind enough to secure, if possible, the statements of any additional witnesses who might have been present on this occasion, and he sent me, in response to this request, the following affidavit, signed by five of the witnesses who were present at the time: California Psychical Research Society, San Francisco, Calif., Nov. 3, 1920. Dr. Hereward Carrington. 504 West 111th St. New York City. Dear Dr. Carrington.