“At the first seance I noticed the tendons move on Slade’s wrist as he held his hand outstretched under the table,” Sir Lankester replied, “and while making a number of suspicious moves he scratched the slates a number of times with his finger nail to simulate the noise made by a slate pencil when writing on a slate.” On the return of Sir Donkin it was arranged that he and Sir Lankester should attend a seance together and that Sir Donkin was to watch for the “suspicious move” and when he saw it signal Sir Lankester. Everything worked as planned. On receiving the agreed signal from Donkin, Lankester seized the slate containing the finished message proving that a skillful exchange of slates had been made by Slade and this was the _real evidence which caused the downfall of Henry Slade_ in England. Blocked in Paris from working his tricks because of the publication of an account of his exposure in England Slade seems to have gone to Germany for it was during the next year, 1877, that he so successfully deluded Professor Zollner. “Zollner” is one of the names on which Spiritualistic enthusiasts bank most heavily for proof of their claims. Even Sir Arthur Conan Doyle to this day quotes Zollner as indisputable authority. Nevertheless Zollner is discredited by Mr. George S. Fullerton, Secretary of the Seybert Commission. While in Germany Mr. Fullerton made a special business of investigating the value of this Zollner endorsement, and at the time all of the men who participated in the Slade investigation were alive with the exception of Zollner himself. Mr. Fullerton in the summary of his report to the Commission said: “Thus it would appear that of the four eminent men whose names have made famous the investigation, there is reason to believe one, Zollner, was of unsound mind at the time, and anxious for experimental verification of an already accepted hypothesis; another, Fechner, was partially blind and _believed_ because of Zollner’s observation; a third, Scheibner, was also afflicted with defective vision and not entirely satisfied in his own mind with the phenomena; and a fourth, Weber, was advanced in age, and did not even recognize the disabilities of his associates. None of the men named had any previous experience or knowledge of the possibilities of deception.” The Seybert Commission, in 1884, seems to have made the first systematic, organized effort to fathom the so-called phenomena of Spiritualism, and this Commission sent for Slade, who was then operating in New York, and had him give a number of seances under their observation, but in spite of the fact that Slade gave the Commission a personal letter thanking them for their courtesies and expressing his willingness to sit with them again, the Commission considered his work fraudulent throughout.