My own ignorance, at any rate, I recognise to be such that my notions of the probable or improbable in the Universe are not of weight enough to lead me to set aside any facts which seem to me well attested, and which are not shown by experts actually to conflict with any better-established facts or generalisations. Wide though the range of established science may be, it represents, as its most far-sighted prophets are the first to admit, a narrow glance only into the unknown and infinite realm of law.
The evidence, then, leading me thus unresisting along, has led me to this main difference from our early treatment of veridical phantasms. Instead of starting from a root-conception of a telepathic impulse merely passing from mind to mind, I now start from a root-conception of the dissociability of the self, of the possibility that different fractions of the personality can act so far independently of each other that the one is not conscious of the other's action.
Naturally the two conceptions coincide over much of the ground. Where experimental thought-transference is concerned—even where the commoner types of coincidental phantasms are concerned—the second formula seems a needless and unprovable variation on the first. But as soon as we get among the difficult types—reciprocal cases, clairvoyant cases, collective cases, above all, manifestations of the dead—we find that the conception of a telepathic impulse as a message despatched and then left alone, as it were, to effect its purpose needs more and more of straining, of manipulation, to fit it to the evidence. On the other hand, it is just in those difficult regions that the analogies of other splits of personality recur, and that phantasmal or automatic behaviour recalls to us the behaviour of segments of personality detached from primary personality, but operating through the organism which is common to both.
The innovation which we are here called upon to make is to suppose that segments of the personality can operate in apparent separation from the organism. Such a supposition, of course, could not have been started without proof of telepathy, and could with difficulty be sustained without proof of survival of death. But, given telepathy, we have some psychical agency connected with man operating apart from his organism. Given survival, we have an element of his personality—to say the least of it—operating when his organism is destroyed. There is therefore no very great additional burden in supposing that an element of his personality may operate apart from his organism, while that organism still exists.
Ce n'est que le premier pas qui coûte. If we have once got a man's thought operating apart from his body—if my fixation of attention on the two of diamonds does somehow so modify another man's brain a few yards off that he seems to see the two of diamonds floating before him—there is no obvious halting-place on his side till we come to "possession" by a departed spirit, and there is no obvious halting-place on my side till we come to "travelling clairvoyance," with a corresponding visibility of my own phantasm to other persons in the scenes which I spiritually visit. No obvious halting-place, I say; for the point which at first seems abruptly transitional has been already shown to be only the critical point of a continuous curve. I mean, of course, the point where consciousness is duplicated—where each segment of the personality begins to possess a separate and definite, but contemporaneous stream of memory and perception. That these can exist concurrently in the same organism our study of hypnotism has already shown, and our study of motor automatisms will still further prove to us.
Dissociation of personality, combined with activity in the metetherial environment; such, in the phraseology used in this book, will be the formula which will most easily cover those actually observed facts of veridical apparition on which we must now enter at considerable length. And after this preliminary explanation I shall ask leave to use for clearness in my argument such words as are simplest and shortest, however vague or disputable their connotation may be. I must needs, for instance, use the word "spirit," when I speak of that unknown fraction of a man's personality—not the supraliminal fraction—which we discern as operating before or after death in the metetherial environment. For this conception I can find no other term, but by the word spirit I wish to imply nothing more definite than this. Of the spirit's relation to space, or (which is a part of the same problem) to its own spatial manifestation in definite form, something has already been said, and there will be more to say hereafter. And similarly those terms, invader or invaded, from whose strangeness and barbarity our immediate discussion began, will depend for their meaning upon conceptions which the evidence itself must gradually supply.
That evidence, as it now lies before us, is perplexingly various both in content and quality. For some of the canons needed in its analysis I have already referred the reader to extracts from Edmund Gurney's writings. Certain points must still be mentioned here before the narrative begins.
It must be remembered, in the first place, that all these veridical or coincidental cases stand out together as a single group from a background of hallucinations which involve no coincidence, which have no claim to veridicality. If purely subjective hallucinations of the senses affected insane or disordered brains alone,—as was pretty generally the assumption, even in scientific circles, when our inquiry began,—our task would have been much easier than it is. But while there can be no question as to the sound and healthy condition of the great majority of our percipients, Edmund Gurney's "Census of Hallucinations" of 1884, confirmed and extended by the wider inquiry of 1889-1892, showed a frequency, previously unsuspected, of scattered hallucinations among sane and healthy persons, the experience being often unique in a lifetime, and in no apparent connection with any other circumstance whatever.[109]
Since casual hallucinations of the sane, then, are thus frequent, we can hardly venture to assume that they are all veridical. And the existence of all these perhaps merely subjective hallucinations greatly complicates our investigation of veridical hallucinations. It prevents the mere existence of the hallucinations, however strangely interposed in ordinary life, from having any evidential value, and throws us upon evidence afforded by external coincidence;—on the mere fact, to put such a coincidence in its simplest form, that I see a phantom of my friend Smith at the moment when Smith is unexpectedly dying at a distance. A coincidence of this general type, if it occurs, need not be difficult to substantiate, and we have in fact substantiated it with more or less completeness in several hundred cases.
The primâ facie conclusion will obviously be that there is a causal connection between the death and the apparition. To overcome this presumption it would be necessary either to impugn the accuracy of the informant's testimony, or to show that chance alone might have brought about the observed coincidences.