We have thus brought the hypnotised subject up to the point of knowing supernormally, at any rate, the superficial sensations of his hypnotiser. From that starting-point,--or, at any rate, from some supernormal perception of narrow range,--his cognition widens and deepens. He may seem to discern some picture of the past, and may retrace the history of some object which he holds in his hand, or he may seem to wander in spirit over the habitable globe, and to bring back knowledge of present facts discernible by no other means. Perhaps he seems to behold the future, predicting oftenest the organic history of some person near him; but sometimes discerning, as it were pictorially, scattered events to which we can guess at no attainable due. For all this there is already more of positive evidence than is generally realised; nor (I must repeat) is there any _negative_ evidence which might lead us to doubt that further care in developing hypnotic subjects may not at any moment be rewarded in the same way. We have here, in fact, a successful branch of investigation which has of late years been practically dropped from mere inattention to what has been done already,--mere diversion of effort to the easier and more practical triumphs of suggestive therapeutics.[96] The next group of cases to which I pass relate chiefly to knowledge of present facts. I may first refer to some experiments in thought-transference with hypnotised persons[97] analogous to the experiments with persons in a normal condition recorded in my next chapter. Here the subject seems simply to become aware telepathically of the thoughts of his hypnotiser, the hypnotic condition perhaps facilitating the transfer of the impression. Next come the cases of what used to be called "travelling clairvoyance" in the hypnotic state. These are more like the partially retrocognitive cases in that they cannot be traced with certainty to the contemporary thoughts of any particular person. In travelling clairvoyance we seem to have a development of "invasive dreams,"--of those visions of the night in which the sleeper seems to visit distant scenes and to bring back intelligence otherwise unattainable. These distant hypnotic visions seem to develop out of thought-transference; thus the subject may discern an imaginary picture as it is conceived in the hypnotiser's mind. Thence he may pass on and discern a true contemporaneous scene,[98] unknown to any one present, and in some few cases there is an element of apparent prevision in the impression.[99] Our survey of that important, though inchoate, appeal to the subliminal self which passes under the name of hypnotism is now nearly as complete--in its brief sketchy form--as the present state of knowledge permits.