Publisher's Synopsis
THE book which is now at last given to the world is but a partial presentation of an ever-growing subject which I have long hoped to become able to treat in more adequate fashion. But as knowledge increases life rolls by, and I have thought it well to bring out while I can even this most imperfect text-book to a branch of research whose novelty and strangeness call urgently for some provisional systematisation, which, by suggesting fresh inquiries and producing further accumulation of evidence, may tend as speedily as possible to its own supersession. Few critics of this book can, I think, be more fully conscious than its author of its defects and its lacunae; but also few critics, I think, have yet realised the importance of the new facts which in some fashion the book does actually present. Many of these facts have already appeared in Phantasms of the Living; many more in the Proceedings of the Society for Psychical Research; but they are far indeed from having yet entered into the scientific consciousness of the age.
