This case has a certain interest _à propos_ of Mr. Podmore's surmise that all such phenomena arise in trickery, which produces excitement in the spectators, while excitement begets hallucination, and hallucination takes the form of seeing the thrown objects move in a non-natural way. Thus, I keep throwing things about. You, not detecting this stratagem, get excited, consequently hallucinated, and you believe you see the things move in spirals, or undulate as if on waves, or hop, or float, or glide in an impossible way. So close is the uniformity of hallucination that these phenomena are described, in similar terms, by witnesses (hallucinated, of course) in times old and new, as in cases cited by Glanvil, Increase Mather, Telfer (of Rerrick), and, generally, in works of the seventeenth century. Nor is this uniform hallucination confined to England. Mr. Podmore quotes a German example, and I received a similar testimony (to the flight of an object round a corner) from a gentleman who employed Esther Teed, 'the Amherst Mystery,' in his service. _He_ was not excited, for he was normally engaged in his normal stable, when the incident occurred unexpectedly as he was looking after his live stock. One may add the case of Cideville (1851) and Sir W. Crookes's evidence, and that of Mr. Schhapoff. Mr. Podmore must, therefore, suppose that, in states of excitement, the same peculiar form of hallucination develops itself uniformly in America, France, Germany, and England (not to speak of Russia), and persists through different ages. This is a novel and valuable psychological law. Moreover, Mr. Podmore must hold that 'excitement' lasted for six weeks among the carpenters in the shop at Swanland, one of whom writes like a man of much intelligence, and has thriven to be a master in his craft. It is difficult to believe that he was excited for six weeks, and we still marvel that excitement produces the same uniformity of hallucination, affecting policemen, carpenters, marquises, and a F.R.S. We allude to Sir W. Crookes's case. Strictly scientific examination of these prodigies has been very rare. The best examples are the experiments of Sir William Crookes, F.R.S., with Home.[6] He demonstrated, by means of a machine constructed for the purpose, and automatically registering, that, in Home's presence, a balance was affected to the extent of two pounds when Home was not in contact with the table on which the machine was placed. He also saw objects float in air, with a motion like that of a piece of wood on small waves of the sea (clearly excitement producing hallucination), while Home was at a distance, other spectators holding his hands, and his feet being visibly enclosed in a kind of cage. All present held each other's hands, and all witnessed the phenomena. Sir W. Crookes being, professionally, celebrated for the accuracy of his observations, these circumstances are difficult to explain, and these are but a few cases among multitudes.