135. Though present on several occasions when table turning was the subject of discussion, it was not, within my hearing, attributed to spiritual agency. In common with almost all educated persons of the nineteenth century, I had been brought up deaf to any testimony which claimed assistance from supernatural causes, such as ghosts, magic, or witchcraft. 136. Subsequently to my publication corroborating the inferences of Faraday, having, in obedience to solicitations already cited, consented to visit circles in which spiritual manifestations were alleged to be made, I was conducted to a private house at which meetings for spiritual inquiry were occasionally held. 137. Seated at a table with half a dozen persons, a hymn was sung with religious zeal and solemnity. Soon afterward tappings were distinctly heard as if made beneath and against the table, which, from the perfect stillness of every one of the party, could not be attributed to any one among them. Apparently, the sounds were such as could only be made with some hard instrument, or with the ends of fingers aided by the nails. 138. I learned that simple queries were answered by means of these manifestations; one tap being considered as equivalent to a negative; two, to doubtful; and three, to an affirmative. With the greatest _apparent sincerity_, questions were put and answers taken and recorded, as if all concerned considered them as coming from a rational though invisible agent. 139. Subsequently, two media sat down at a small table, (drawer removed,) which, upon careful examination, I found to present to my inspection nothing but the surface of a bare board, on the under side as well as upon the upper. Yet the taps were heard as before, seemingly against the table. Even assuming the people by whom I was surrounded, to be capable of deception, and the feat to be due to jugglery, it was still inexplicable. But manifestly I was in a company of worthy people, who were themselves under a deception if these sounds did not proceed from spiritual agency. 140. On a subsequent occasion, at the same house, I heard similar tapping on a partition between two parlours. I opened the door between the parlours, and passed to that adjoining the one in which I had been sitting. Nothing could be seen which could account for the sounds. 141. The medium to whose presence these manifestations were due, then held a flute against the panel of the door, and invited me to listen. On putting my ear near to the flute, tapping was quite audible. On the ensuing evening, I carried with me a sealed glass tube, a hollow tube of the same material, and a brass rod. These being successively held against the door panel, similarly to the holding of the flute, the rapping was again heard.[6]