But so far as our present subject is concerned, all the evidence obtainable goes to show that the phenomena in question only take place in the presence of what is called "a medium"--a person of peculiar nervous or psychical organisation. That this is the case, moreover, appears to be the general belief of spiritists on the subject. In the sense, then, in which "a talisman" connotes a material object of such a nature that by its aid the powers of discarnate intelligences may become operative on material things, we might apply the term "talisman" to the nervous system of a medium: but then that would be the only talisman. Consequently, even if one is prepared to admit the whole of modern spiritistic theory, nothing is thereby gained towards a belief in talismans, and no light is shed upon the subject. (1) The publications of The Society for Psychical Research, and FREDERICK MYERS' monumental work on _Human Personality and its Survival of Bodily Death_, should be specially consulted. I have attempted a brief discussion of modern spiritualism and psychical research in my _Matter, Spirit, and the Cosmos_ (1910), chap. ii. Another theory concerning talismans which commended itself to many of the old occult philosophers, PARACELSUS for instance, is what may be called the "occult force" theory. This theory assumes the existence of an occult mental force, a force capable of being exerted by the human will, apart from its usual mode of operation by means of the body. It was believed to be possible to concentrate this mental energy and infuse it into some suitable medium, with the production of a talisman, which was thus regarded as a sort of accumulator for mental energy. The theory seems a fantastic one to modern thought, though, in view of the many startling phenomena brought to light by psychical research, it is not advisable to be too positive regarding the limitations of the powers of the human mind. However, I think we shall find the element of truth in the otherwise absurd belief in talismans by means of what may be called, not altogether fancifully perhaps, a transcendental interpretation of this "occult force" theory. I suggest, that is, that when a believer makes a talisman, the transference of the occult energy is ideal, not actual; that the power, believed to reside in the talisman itself, is the power due to the reflex action of the believer's mind. The power of what transcendentalists call "the imagination" cannot be denied; for example, no one can deny that a man with a firm conviction that such a success will be achieved by him, or such a danger avoided, will be far more likely to gain his desire, other conditions being equal, than one of a pessimistic turn of mind. The mere conviction itself is a factor in success, or a factor in failure, according to its nature; and it seems likely that herein will be found a true explanation of the effects believed to be due to the power of the talisman.