It will be seen that the present book has little claim to novelty of design; but it is not merely an abridged edition of the larger work referred to. On the one hand it has a somewhat wider scope, and includes accounts of telepathic clairvoyance and other phenomena which did not enter into the scheme of Mr. Gurney's book. On the other hand, the bulk of the illustrative cases here quoted have been taken from more recent records; and, in particular, certain branches of the experimental work have assumed a quite new importance within the last few years. Thus the experiments conducted by Mrs. Henry Sidgwick at Brighton have strengthened the demonstration of thought-transference, and have gone far to solve one or two of the problems connected with the subject; and the evidence for the experimental production of telepathic effects at a distance has been greatly enlarged by the work of MM. Janet and Gibert,[2] Richet, Gibotteau, Schrenck-Notzing, and in this country by Mr. Kirk and others.[3] It may be added that some of the criticisms called forth by _Phantasms of the Living_, and our own further researches, have led us to modify our estimate of the evidence in some directions, and to strengthen generally the precautions taken against the unconscious warping of testimony. To say, however, that the following pages owe much to Edmund Gurney is but to acknowledge the obligation which all students of the subject must recognise to his keen and vigorous intellect and his colossal industry. My own debt is a more personal one. To have worked under his guidance, and to have been stimulated by his example, was an invaluable schooling in the qualities demanded by an inquiry of this nature. Of the living, I owe grateful thanks, in the first instance, to Professor and Mrs. Henry Sidgwick, who have read through the whole of the book in typescript, and have given help and counsel throughout. Miss Alice Johnson, Mr. F. W. H. Myers, the late Dr. A. T. Myers, Miss Porter, and others have also given me welcome help in various directions. In acknowledging this assistance, however, it is right to add that, though I trust in my estimate of the evidence presented, and in the general tenour of the conclusions suggested, to find myself, with few exceptions, in substantial agreement with my colleagues, yet I have no claim to represent the Society for Psychical Research, nor right to cloak my own shortcomings with the authority of others.