Later in the same year, Mr. C. R. Mitchell, a former leader of the Hackney Spiritualistic Society and well known in mediumistic circles in London, was selected to “undertake certain tests of a scientific nature for the purpose of ascertaining the value of these Spirit phenomena.” Mr. Mitchell was a photographer and wished to use his own plates in the experiment but Mrs. Deane, who was to conduct it, refused to let him unless he _first left them with her for a few days to be magnetized_. He objected to this and it was finally agreed that he could use his own plates provided he would magnetize them himself but the results were unsatisfactory. He then purchased from Mrs. Deane a package of fresh plates, which, it was claimed, had not been opened since it left the manufacturer. The likeness of a soldier appeared on one of these which Mr. Mitchell developed himself and he concluded that not only had the plates been “magnetized” but that they had been exposed in a camera as well. The issue of _Truth_ for June 28th, 1922, gives an account of the experience of an ex-Indian missionary, who, with three others, visited the Crewe photographers and sat for Spirit pictures. Four exposures were made and Spirit “extras” appeared on two of the plates but the men could not remember whether the plates had at any time been beyond their control so the missionary arranged for another sitting taking the precaution to have his plates marked on the corner with a glazier’s diamond. At this second sitting one Spirit extra was produced but there was _no diamond mark_ on the plate, positive proof that an exchange had been effected. During 1922 the Occult Committee of the Magic Circle took up the investigation of Spirit photography first giving its attention to Mr. Vearncombe who produced Spirit extras in connection with some object once in possession of the deceased. Sir Arthur Conan Doyle put this committee in touch with the Honorary Secretary of the Society for the Study of Supernormal Pictures, Mr. Barlow, and at the latter’s suggestion sent him an unopened package of plates for Mr. Vearncombe. Although Barlow objected, “for Vearncombe’s satisfaction, though not essential,” the package was enclosed in a lead case. Also at Barlow’s suggestion a fee accompanied the package. After a month of waiting the committee received a photograph of the package and on the photograph was a spirit message which read: “Barred your side.” In order to remove the barrier a fresh package of plates was forwarded to Vearncombe, this time in an ordinary wrapper. Some months later, after the plates had been Spiritually treated by Vearncombe, they were returned to the committee. When developed “psychic extras” were found on two plates. There was evidence that the package had been tampered with and the same spirit had been seen on other photographs.