Again, there is a strange case,[114] which comes to us on good authority, where we must suppose one man's subliminal impulse to have created a picture of himself, his wife, a carriage and a horse, persistent enough to have been watched for some seconds at least by three observers in one place, and by a fourth and independent observer at another point in the moving picture's career. The only alternative, if the narrative be accepted as substantially true, will be the hypothesis before alluded to of the flashing of an impending scene, as in crystal-vision, from some source external to any of the human minds concerned. I need hardly at this point repeat that in my view the wife and the horse will be as purely a part of the man's conception of his own aspect or environment as the coat on his back.
And here, for purposes of comparison, I must refer to one of the most bizarre cases in our collection.[115] Four credible persons, to some extent independently, see a carriage and pair, with two men on the box and an inside occupant, under circumstances which make it impossible that the carriage was real. Now this vision cannot have been precognitive; nothing of the kind occurred for years after it, nor well could occur; and I am forced to regard it as the externalisation of some dream, whether of an incarnate or of a discarnate mind. The parallel between this case and the one mentioned above tends therefore to show that the first, in spite of the paraphernalia of wife, horse, and dog-cart, may have been the outcome of a single waking dream;—of the phantasmogenetic dissociation of elements of one sole personality.
In the cases which I have just been discussing there has been a psychical excursion, with its possibilities of clairvoyance; but the excursive element has not brought home any assignable knowledge to the supraliminal personality. I go on now to cases where such knowledge has thus been garnered. But here there is need of some further pause, to consider a little in how many ways we can imagine that knowledge to be reached.
Firstly, the distant knowledge may, it would seem, be reached through hyperæsthesia,—an extended power of the ordinary senses. Secondly, it sometimes seems to come through crystal-gazing or its correlative shell-hearing,—artifices which seem to utilise the ordinary senses in a new way. And besides these two avenues to distant knowledge there is a third, the telepathic avenue, which, as we have already surmised, sometimes shades off into the purely telæsthetic; when no distant mind, but only the distant scene, seems to be attracting the excursive spirit. And in the fourth place we must remember that it is mainly in the form of dream or vision that the most striking instances of telæsthesia which I have as yet recorded have come. Can we in any way harmonise these various modes of perception? Can we discover any condition of the percipient which is common to all?
To a certain limited extent such co-ordination is possible. In each approach to telæsthesia in turn we find a tendency to something like a dream-excursion. Hyperæsthesia, in the first place, although it exists sometimes in persons wide awake, is characteristically an attribute of sleep-waking states.
We have seen in discussing hypnotic experiments that it is sometimes possible to extend the subject's perceptive faculty by gradual suggestion, so far as to transform a hyperæsthesia which can still be referred to the action of the sense-organs into a telæsthesia which cannot be so referred. It is observable that percipients in such cases sometimes describe their sensation as that of receiving an impression, or seeing a picture placed before them; sometimes as that of travelling and visiting the distant scene or person. Or the feeling may oscillate between these two sensations, just as the sense of time-relation in the picture shown may oscillate between past, present, and future.
To all these complex sensations the phenomena of crystal-gazing offer close analogies. I have already remarked on the curious fact that the simple artifice of gazing into a speculum should prove the avenue to phenomena of such various types. There may be very different origins even for pictures which in the crystal present very similar aspects; and certain sensations do also accompany these pictures; sensations not merely of gazing but sometimes (though rarely) of partial trance; and oftener of bilocation;—of psychical presence among the scenes which the crystal has indeed initiated, but no longer seems to limit or to contain.
The idea of psychical excursion thus suggested must, however, be somehow reconciled with the frequently symbolic character of these visions. The features of a crystal-vision seem often to be no mere transcription of material facts, but an abbreviated selection from such facts, or even a bold modification of such facts with a view of telling some story more quickly and clearly. We are familiar with the same kind of succession of symbolical scenes in dream, or in waking reverie. And of course if an intelligence outside the crystal-gazer's mind is endeavouring to impress him, this might well be the chosen way.
And moreover through all telæsthetic vision some element of similar character is wont to run—some indication that mind has been at work upon the picture—that the scene has not been presented, so to say, in crude objectivity, but that there has been some choice as to the details discerned; and some symbolism in the way in which they are presented.
Let us consider how these characteristics affect different theories of the mechanism of clairvoyance. Let us suppose first that there is some kind of transition from hyperæsthesia to telæsthesia, so that when peripheral sensation is no longer possible, central perception may be still operating across obstacles otherwise insurmountable.