at the third side, when unoccupied, wonderful manifestations occur, such as a chair's elevation, or being thrown down, or the appearance of the unsupported slate, etc. These manifestations are executed by the Medium's foot, and lest its motions under the table should be detected, the longitudinal cracks where the two table-leaves join, were carefully stuffed with paper, although, to be sure, he once explained to me the presence of this paper as necessary to keep 'the electricity from flowing through.' Although Dr. Slade had agreed verbally in New York that the last séance of the series should be in the presence of all the Commission, he flatly refused, when in Philadelphia, to hold any in the presence of more than three at a time. On one occasion, when the Medium was very sure of his sitters, he placed the prepared slate, face downwards, on the table, with his fingers resting on the upper surface, then in a few minutes the slate was lifted up and the writing displayed, as though just made by Spiritual agency. Generally, however, when the writing is thus exhibited, it is in answer to a spoken question, and the reply is written by the Medium in his lap and the slate turned over before it is placed on the table. Manifestly it cannot occur as an answer to a written question, unless the written question is exposed on the upper side of the slate. How the scratching of the slate pencil is produced when the slate is lying on the table (I have been told that the sound is heard then) I cannot possibly explain, for the plain reason that I am too deaf to hear it, and I was, therefore, never on the watch for anything unusual. (Nor did I ever hear the sound of writing when the slate was held on the shoulder of my opposite neighbor, but I could see, and I knew what was going on, for the slate had once been placed on my own shoulder.) When three slates are used, the third, and prepared, slate, is either on the little table behind him or on the floor resting against the supports of this little table. In either case he seizes the opportunity when his sitters are engrossed with an answer just given to a question, to substitute one of the slates which he has been using, and which he has just before ostentatiously washed on both sides, for the prepared slate. This I have distinctly seen him do twice, and once when I had arisen from my seat to read an answer on the slate, held by Mr. Sellers, I noticed when I resumed my seat that a certain slate which I had been watching was gone from where it had been resting against the leg of the little table, and we then immediately had the long message between closed slates. [This was the 'inferential' substitution referred to on page 59 of this Appendix.] The slate which we have preserved and had photographed I saw him take from the table at his back. Next, as to his answers to questions. I became so familiar with his methods in this department that I could have told at almost any instant what he was doing.