The professional mediums who every Sunday, sometimes more frequently, conduct the spiritualist services in our towns are obviously regarded as persons of great importance and authority by their large audiences, and the consciousness of this, apart altogether from the fact of their fees, may stimulate them to supplement, if need be, the output of possibly genuine phenomena by an ever-ready supply of pseudo-messages and haphazard “delineations.” The humbler mediums, usually unpaid, who form the centre of thousands of “circles” in our working-class homes are invested with an importance and feel a mental exaltation quite foreign to the drabness of their ordinary surroundings and occupations. And here again if genuine powers of clairvoyance are inadequate or non-existent, this special form of spiritual pride will still provide a satisfactory flow of messages from the deceased buccaneer or Indian chief who acts as the “control.” It is difficult indeed to assign any limits to the intrusion of this singular influence in the domain of psychical research. In one remarkable instance a London barrister of recognized standing and enjoying a large income from his profession posed for some time in private circles as a physical medium. He claimed _inter alia_ the power of causing the partial levitation of a table by placing his hands on the top. Yet at a sitting conducted by members of the S. P. R. this gentleman was easily detected in the childish trick of having inserted inside his cuffs two small pieces of wood, which were thus introduced under the table’s edge! On another occasion I found during the investigation of a case in Hampshire that a maid-servant, possibly in collusion with her mistress, was producing luminous crosses by rubbing moistened matches on the furniture and walls――there being no conceivable motive for this transparent deception beyond the desire to be regarded as a successful “medium”. Much, if not all of the story of the Rev. Stainton Moses’ career can probably best be explained as an amazing example of spiritual megalomania. Such a theory of course involves the disagreeable conclusion that a clergyman and a public-school master, endowed with a kindly and generous disposition, must have spent years of his life in the systematic deception of his most intimate friends and, later on, of the public at large. Nevertheless, all said and done, the moral miracle in this astonishing case is, as Mr. Podmore suggested, more easy than the physical one. The extraordinary poltergeist cases――cases by no means infrequent and widely distributed――in which furniture is violently moved, windows and crockery smashed, and pictures thrown down, can usually be traced to the furtive trickery of little boys, or more commonly little girls, who do not scruple to destroy their parents’ property and peace of mind in order to secure for themselves the secret satisfaction of some megalomaniac impulse.