The unity of character and consciousness in the communicators is one of the reasons which most strongly support the spiritualistic hypothesis. If we were dealing with Mrs Piper's secondary personalities, the first difficulty would be found in their great number. I do not know the exact number of communicators who have asserted their appearance by means of her organism. But several hundreds may be found in the Reports of the Society for Psychical Research, and they are certainly far from being all mentioned. Now each communicator has kept the same character throughout, to such an extent that, with a little practice, it is possible to recognise the communicator at the first sentence he utters, if he has already communicated. Some of the communicators only appear at long intervals, but nevertheless they remain unchanged. But, on the telepathic hypothesis, it is not easy to understand that a self-styled communicator, a merely ephemeral consciousness reconstituted out of the scattered recollections of the sitters, should be thus reconstituted only at long intervals, suddenly, often without apparent cause, and always with the same characteristics. This unity of consciousness and character is particularly evident in the controls--that is, in such of the communicators as have appeared uninterruptedly for years, on account of their acting as intermediaries for others, and helping them with their experience. If it cannot reasonably be admitted that the occasional communicators are only secondary personalities of the medium, the impossibility must be extended to the controls. Either all the communicators are, without exception, secondary personalities, or none of them are; for all give the same impression of intense life-likeness and reality. If they are indeed secondary personalities, science has hitherto studied none like them. I have already sketched Phinuit's character, which has remained consistently the same during twelve years. The reader should also have a sufficiently clear notion of George Pelham's individuality, which is also consistent; even now, when George Pelham appears, we find him unchanged.