Belief in the evocation of the spirits of the dead is as old as Humanity. At one period of the world's history it was called Thaumaturgy, at another Necromancy and Witchcraft, in these latter years, Spiritualism. It is new wine in old bottles. On March 31, 1847, at Hydeville, Wayne County, New York, occurred the celebrated "knockings," the beginning of modern Spiritualism. The mediums were two little girls, Kate and Margaretta Fox, whose fame spread over three continents. It is claimed by impartial investigators that the rappings produced in the presence of the Fox sisters were occasioned by natural means. Voluntary disjointings of the muscles of the knee, or to use a medical term "the repeated displacement of the tendon of the _peroneus longus_ muscle in the sheath in which it slides behind the outer _malleolus_" will produce certain extraordinary sounds, particularly when the knee is brought in contact with a table or chair. Snapping the toes in rapid succession will cause similar noises. The above was the explanation given of the "Hydeville and Rochester Knockings", by Professors Flint, Lee and Coventry, of Buffalo, who subjected the Fox sisters to numerous examinations, and this explanation was confirmed many years after (in 1888) by the published confession of Mrs. Kane, _nee_ Margaretta Fox. Spiritualism became the rage and professional mediums went about giving séances to large and interested audiences. This particular creed is still professed by a recognized semi-religious body in America and in Europe. The American mediums reaped a rich harvest in the Old World. The pioneer was Mrs. Hayden, a Boston medium, who went to England in 1852, and the table-turning mania spread like wild fire within a few months. Broadly speaking, the phenomena of modern Spiritualism may be divided into two classes: (1) Physical, (2) Subjective. Of the first, the "Encyclopaedia Britannica", in its brief but able review of the subject, says: "Those which, if correctly observed and due neither to conscious or unconscious trickery nor to hallucination on the part of the observers, exhibit a force hitherto unknown to science, acting in the physical world otherwise than through the brain or muscles of the medium." The earliest of these phenomena were the mysterious rappings and movements of furniture without apparent physical cause. Following these came the ringing of bells, playing on musical instruments, strange lights seen hovering about the séance-room, materializations of hands, faces and forms, "direct writing and drawing" declared to be done without human intervention, spirit photography, levitation, unfastening of ropes and bandages, elongation of the medium's body, handling fire with impunity, etc.