Many of the most prominent mediums of the day appeared before the Commission during its three years of work. Some of them underwent a whole series of tests and the phenomena covered the whole gamut from simple rapping to spirit photography, automatic and slate writing, materialization, etc. In every case with but one exception the result was either a blank seance, a positive failure, or a deliberate cheat. The exception was when Mr. Harry Kellar was called in as a magician to demonstrate his power as a slate writer. The Commission was successfully baffled, not a single member being able to fathom his method until he explained it. The Commission carefully weighed all the evidence placed before it and formed its conclusions with such deliberation and thoroughness that the most critical on either side found no cause for objecting or saying that it was swayed or biased by any undue influence whatever. It pursued its work on purely rational, scientific lines, strenuously avoiding all conditions which might be construed as conducive to doubtful conclusions. It was looking for facts in a matter-of-fact way and as there was no opportunity for screening artifices no occult or psychic phenomena were proven to have existed. As an evidence of the fairness with which the Commission was considered to have done its work, I quote the following letter to the Commission from Dr. Henry Slade. “No. 11 E. 13th Street, N. Y., Feb. 4, 1885. “Dear Mr. Furness:--I take this opportunity to express to you, and through you to the other members of the Seybert Commission, my hearty approval of the course pursued by them in their investigation of phenomena occurring in my presence. Fully realizing that I am only the instrument or channel through which these manifestations are produced, it would be presumption on my part to undertake to lay down a line to be followed by the unseen intelligence, whose servant I am. Hence I did say their conditions must be acceded to or I would return to New York. That they did so, is evident to my mind from the results obtained, which I regard as a necessary preliminary to a continuation, when other experiments may be introduced with better prospects of success. It may be well not to insist on following the exact course followed by Professor Zollner, but leave it open to original or impromptu suggestions that may be adopted without previous consideration, which, if successful, would be of equal value as evidence of its genuineness, at the same time give greater breadth to the experiments. In conclusion, allow me to say that in the event the Committee desires to continue these experiments through another series of sittings with me, it will give me pleasure to enter into arrangements for that purpose. “Very truly yours, “Henry Slade.”