Among other strange manifestations, he positively declares that his library-bell was brought into a room in which he was sitting with the medium, with locked doors, both he and his children having seen and handled the bell a short time before in the library. Also a piece of China grass was taken from a vase on the table, and before his eyes seemed to pass through the substance of the table. Observation showed that there was a crack in the table through which it had apparently passed. But this crack was much narrower than the diameter of the grass, yet the latter showed no signs of abrasion or change of shape. As to the intelligence manifested by this strange power he gives the following instance. A lady was writing with a planchette. "I asked, 'Can you see the contents of this room?' 'Yes,' wrote the planchette. 'Can you see to read this newspaper?' said I, putting my finger on a copy of the 'Times' which was on the table behind me, but without looking at it. 'Yes,' was the reply of the planchette. 'Well,' I said, 'if you can see that, write the word that is now covered by my finger, and I will believe you.' The planchette commenced to move. Slowly and with great difficulty the word 'however' was written out. I turned round, and saw that the word 'however' was covered by the tip of my finger. I had purposely avoided looking at the newspaper when I tried this experiment, and it was impossible for the lady, had she tried, to have seen any of the printed words, for she was sitting at one table, and the paper was on another table behind, my body intervening." The most remarkable phenomena attested by Professor Crooks, however, are those classed as luminous appearances, and particularly as luminous hands. Some of the most striking of those may be here quoted: "Under the strictest test-conditions I have seen a self-luminous body, the size and nearly the shape of a turkey's egg, float noiselessly about the room, at one time higher than any one present could reach standing on tiptoe, and then gently descend to the floor. It was visible more than ten minutes, and before it faded away struck the table three times with a sound like that of a hard, solid body. During this time the medium was lying back, apparently insensible, in an easy-chair." "I have had an alphabetic communication given by luminous flashes occurring before me in the air while my hand was moving about among them. I was sitting next to the medium, Miss Fox, the only other persons present being my wife and a lady relative, and I was holding the medium's two hands in one of mine, while her feet were resting on my feet. Paper was on the table before us, and my disengaged hand was holding a pencil. A luminous hand came down from the upper part of the room, and, after hovering near me for a few seconds, took the pencil from my hand, rapidly wrote on a sheet of paper, threw the pencil down, and then rose up above our heads, gradually fading into darkness."