This special sensibility to the _motor_ element in an impulse recalls to us the special susceptibilities to different forms of hallucination or suggestion shown by different hypnotic subjects. Some can be made to see, some to hear, some to act out the conception proposed to them. Dr. Bérillon[178] has even shown that certain subjects who seem at first quite refractory to hypnotisation are nevertheless at once obedient, even in the waking state, to a motor suggestion. This was the case both with a very strong man, with weak men and women, and with at least one subject actually suffering from locomotor ataxy. Thus the loss of supraliminal motor control over certain muscular combinations may actually lead to _motor suggestibility_ as regards those combinations; just as the loss of supraliminal sensation in some anæsthetic patch may lead to a special subliminal sensitiveness in the very directions where the superficial sensibility has sunk away. On the other hand, a specially well-developed motor control may predispose in a similar way;--as for instance, the subject who can sing already is more easily made to sing by suggestion. We must, then, await further observations before we can pretend to say beforehand with which automatist the messages will take a sensory, and with which a motor form. Still less can we explain the special predisposition of each experimenter to one or more of the common kinds of motor automatism--as automatic speech, automatic writing, table movements, raps, and so forth. These forms of messages may themselves be variously combined; and the contents of a message of any one of these kinds may be purely dream-like and fantastic, or may be veridical in various ways. Let us enumerate the modes of subliminal motor message as nearly as we can in order of their increasing specialisation. 1. We may place first the massive motor impulses (like Mr. Garrison's) which mark a kind of transition between cœnesthetic affections and motor impulses proper. There was here no impulse to special movement of any limb; but an impulse to reach a certain place by ordinary methods. 2. Next, perhaps, in order of specialisation come the simple subliminal muscular impulses which give rise to table-tilting and similar phenomena. 3. Musical execution, subliminally initiated, might theoretically be placed next; although definite evidence of this is hard to obtain, since the threshold of consciousness with musical performers is notoriously apt to be shifting and indefinite. ("When in doubt, play with your fingers, and not with your head.") 4. Next we may place automatic drawing and painting. This curious group of messages has but seldom a telepathic content, and, as was suggested in Chapter III., is more akin to _genius_ and similar non-telepathic forms of subliminal faculty.[179] 5. Next comes automatic writing, on which much remains to be said in this chapter.