There are many other kinds of mediumship or psychic faculty, and many volumes are in existence on each phase; the library of the London Spiritualist Alliance contains about 3,000. I have read about 500 of them, and would not recommend anyone else to do the same. There is a great deal of rubbish among them, though they are not all rubbish. The reading I recommend is the _Proceedings_ of the S.P.R., the writings of Sir William Barrett, Sir Oliver Lodge, Dr W. J. Crawford, and, above all, the great work of F. W. H. Myers, _Human Personality and Its Survival of Bodily Death_, in the original two-volume edition. The abridged one-volume edition omits many of the illustrative cases. I do not think that conviction is to be achieved by mere reading; books would never have convinced me. But careful reading is perhaps sufficient to lead a fairly tolerant mind to realise that there is something here which must not be dismissed off-hand; something which is worthy of investigation. That is as much as we expect. Sir Oliver Lodge often says that we shall do well if we succeed, in this generation, in modifying the psychological climate, creating an atmosphere more favourable to unprejudiced examination of the facts. We have no desire for revolutions; we want knowledge to grow slowly and surely. The S.P.R. has been in existence only thirty-seven years, and the subject is in its scientific infancy. Take the beginnings of any one science--say, Chemistry, dating it somewhat arbitrarily from Priestley or Dalton--and note what a little way discovery had gone in a like period. With increased numbers of workers the pace increases; but in every science the progress at first must be slow. In psychical research a good start has been made, and the investigators seem to be certainly on the track of something, whether their inferences are right in every detail or not. And every advance in science has extended our conceptions of this wonderful universe. The heavens declare the glory of God in a tremendously larger way than they did in the days of the old Ptolemaic astronomy, though man foolishly fought the Copernican idea because it seemed to lessen our dignity by making our earth a speck on the scale of creation instead of the central body thereof. So with all other phenomena, physical and psychical. We may be sure that all discovery will be real revelation. With this faith--a well-grounded faith--we need not fear advance. RECENT CRITICISM