Yet, when all is said and done, the very formulating of theories, so far from solving problems, only raises further and more complex ones, perhaps the greatest of which is, Have the spirits of the departed anything to do with the matter?  As we have shown, we hope with success, in the preceding paragraphs, many “ghosts” have no necessary connection with the denizens of the unseen world, but may be explained as being due to laws of nature which at present are very obscure.  Does this hold good of all “ghosts,” or are some of them to be placed to the credit of those who have passed beyond the veil, or perhaps to spirits, good or evil, which have never been incarnate?  That is the problem for the future, for in the present state of our knowledge it would be premature to give a direct answer, either positive or negative.

This book was written with a twofold purpose:  first, that of entertaining our readers, in which we trust we have been successful; secondly, to stimulate thought.  For, strange though it may seem, authenticated “ghost stories” have a certain educative value.  Taking them at their lowest they suggest inquiry into the strange workings of the human mind:  at their highest how many strange lines of inquiry do they not suggest?  For it is obvious that we have now arrived at one of those interesting periods in the history of human thought which might be described as the return of the pendulum.  We are in the process of emerging from a very materialistic age, when men either refused to believe anything that was contrary to their normal experience, or else leavened their spiritual doctrines and beliefs with the leaven of materialism.  The pendulum has swung to its highest point in this respect, and is now commencing to return, so perhaps the intellectual danger of the future will be that men, instead of believing too little, will believe too much.  Now is the time for laying a careful foundation.  Psychical research, spiritualism, and the like, are not ends in themselves, they are only means to an end.  At the present state of thought, the transition from the old to the new, from the lower to the higher, it is inevitable that there must be confusion and doubt, and the earnest thinker must be prepared to suspend judgment on many points; but at a later stage, when all absurdity, error, and fraud, now so closely connected with psychical research in its various branches, will have been swept away, Truth will emerge and lift the human race to a purer and loftier conception of God and His universe.