Let it be clearly understood that at the moment I am not expressing any opinion as to whether this or any allied phenomenon has actually occurred. I am concerned merely with the inferences we should be compelled to draw if such an occurrence were substantiated scientifically beyond all possibility of doubt. We have seen that given four-dimensional space as a reality and an intelligent four-dimensional being equipped with the necessary knowledge, powers, facilities and so forth, which I have included under the general term of "apparatus" the thing could be done in a comparatively comprehensible manner, although the actual manipulative details would still require clearing up. The question now arises: Is this the only conceivable _modus operandi_ that could bring about the same result? It is not. There is one other, and so far as I know only one other, theory which has been advanced to account for this type of phenomenon. It has been supposed that the solid object in question is dissociated, by some obscure means, into ultra-atomic particles, is passed in this condition through the walls of the box and finally "integrated" again into its original form outside the box. Now, apart from the obvious difficulty of imagining how these ultra-atomic particles are integrated into the precise form originally possessed by the object, this theory has at first sight a certain plausibility. We know that all matter is probably susceptible of dissociation in a fashion that was originally supposed to be the exclusive property of Radium and other Radio-active substances.[3] If, then, we postulate the existence of intelligent beings in a non-physical state of existence, there is nothing to prevent us from supposing that certain of them have acquired a sufficient knowledge of physical laws to enable them to effect a process of this nature artificially. I do not say that this idea commends itself to me; but it is the explanation most commonly offered for the phenomena in question, and this fact taken in conjunction with its _prima facie_ plausibility, entitles it to careful consideration before we dismiss it as untenable. The real objection to it is a mere matter of Physics. The work of the scientists mentioned above goes to show that what we call matter is no more than a condensation of energy in the ether; and that the dissociation of matter is invariably accompanied by an enormous liberation of energy. For calculations on this point the reader may refer to M. Le Bon's book "The Evolution of Matter." Without going into such calculations it may be said that the amount of energy that would be liberated in the dissociation of a gramme of matter, would be amply sufficient, if it were produced in the form of heat, to fuse, and for that matter vaporise, the experimenters, the room, the whole house, and probably about half the town as well!