No support is given by what we know of this group to the theory which regards subliminal mentation as necessarily a sign of some morbid dissociation of physical elements. Is there, on the other hand, anything to confirm a suggestion which will occur in some similar cases, namely, that,--inasmuch as the addition of subliminal to supraliminal mentation may often be a completion and integration rather than a fractionation or disintegration of the total individuality,--we are likely sometimes to find traces of a more than common activity of the _right_ or less used cerebral hemisphere? Finding no mention of ambidexterity in the meagre notices which have come down to us of the greater "prodigies," I begged the late Mr. Bidder, Q.C., and Mr. Blyth, of Edinburgh (the well-known civil engineer and perhaps the best living English representative of what we may call the calculating diathesis), to tell me whether their left hands possessed more than usual power. And I find that in these--the only two cases in which I have been able to make inquiry--there is somewhat more of dextro-cerebral capacity than in the mass of mankind. We may now pass on to review some further instances of subliminal co-operation with conscious thought;--first looking about us for any cases comparable in _definiteness_ with the preceding; and then extending our view over the wider and vaguer realm of creative and artistic work. But before we proceed to the highly-specialised senses of hearing and sight, we must note the fact that there are cases of subliminal intensification of those perceptions of a less specialised kind which underlie our more elaborate modes of cognising the world around us. The sense of the _efflux of time_, and the sense of _weight_, or of muscular resistance, are amongst the profoundest elements in our organic being. And the sense of time is indicated in several ways as a largely subliminal faculty. There is much evidence to show that it is often more exact in men sleeping than in men awake, and in men hypnotised than in men sleeping. The records of spontaneous somnambulism are full of predictions made by the subject as to his own case, and accomplished, presumably by self-suggestion, but without help from clocks, at the precise minute foretold. Or this hidden knowledge may take shape in the imagery of dream, as in a case published by Professor Royce, of Harvard,[30] where his correspondent describes "a dream in which I saw an enormous flaming clock-dial with the hands standing at 2.20. Awaking immediately, I struck a match, and upon looking at my watch found it was a few seconds past 2.20."