I am perfectly willing to admit that much which passes as telepathy may be thus reducible. For example, I am seated writing at the desk in my study. Unexpectedly there flashes into my mind an idea concerning a person of whom I have not thought for weeks or months. The next instant the doorbell rings, and presently the maid informs me that the very person of whom I have that moment been thinking has entered the house. This is a not infrequent experience, as most of my readers will concede. So frequent is it that it is absurd to attempt to account for it on the hypothesis of chance coincidence. But neither would it be always safe to raise the theory of telepathy. For it might well happen that while I was seated intent on my work, with the study windows closed, my ear nevertheless caught the sound of footsteps coming down the street, or on my porch; that I subconsciously recognized in them my friend's walk, and that I consequently, though without knowing why, thought of him at that precise moment. This is assuredly a possible explanation--though I am far from conceding that in all such cases it is the only explanation properly applicable. So, likewise, one must be constantly on guard against over-readily accepting as evidences of telepathic action the feats of "mind reading" often undertaken by way of parlor amusement. Stage "mind reading" by professional entertainers may be safely left out of the reckoning, as undoubtedly based on methods of conscious trickery and deceit. But in a private gathering, where there can be no question of confederates and deliberate signaling, surprising results are sometimes obtained in the finding of hidden objects, etc. On the surface this would seem explicable only on a telepathic basis, yet in reality it is commonly brought about by "muscle reading" rather than by true "mind reading." Experiment has shown that the effort to concentrate thought on a given matter--a name or an object--tends to produce some form of muscular activity, either subconscious whispering of the name thought of, or subconscious movement in the direction of the object. If, as is the rule, the spectators are supposed to keep their minds fixed intently on the name or object they have selected for the "test," some of them are apt to give these involuntary muscular hints, which the performer will accept and act upon, it may be without being clearly conscious of the source of his information. Still it must be added that experiments in the "willing game" have been carried out under conditions and with results indicating that occasionally, at all events, successes are achieved without any such subconscious guidance. Not so very long ago some interesting and most striking experiments of this sort were described to me by Professor J. H. Hyslop.