Let us next consider what types of communication from the dead our existing evidence of communications among the living suggests to us as analogically possible. It appears to me that there is an important parallelism running through each class of our experiments in automatism and each class of our spontaneous phenomena. Roughly speaking, we may say that our experiment and observation up to this point have comprised five different stages of phenomena, viz., (I.) hypnotic suggestion; (II.) telepathic experiments; (III.) spontaneous telepathy during life; (IV.) phantasms at death; (V.) phantasms after death. And we find, I think, that the same types of communication meet us at each stage; so that this recurrent similarity of types raises a presumption that the underlying mechanism of manifestation at each stage may be in some way similar. Again using a mere rough form of division, we shall find three main forms of manifestation at each stage: (1) hallucinations of the senses; (2) emotional and motor impulses; (3) definite intellectual messages. (I.) And first let us start from a class of experiments into which telepathy does not enter, but which exhibit in its simplest form the mechanism of the automatic transfer of messages from one stratum to another of the same personality. I speak, of course, of post-hypnotic suggestions. Here the agent is a living man, operating in an ordinary way, by direct speech. The unusual feature lies in the condition of the percipient, who is hypnotised at the time, and is thus undergoing a kind of dislocation of personality, or temporary upheaval of a habitually subjacent stratum of the self. This hypnotic personality, being for the time at the surface, receives the agent's verbal suggestion, of which the percipient's waking self is unaware. Then afterwards, when the waking self has resumed its usual upper position, the hypnotic self carries out at the stated time the given suggestion,--an act whose origin the upper stratum of consciousness does not know, but which is in effect a message communicated to the upper stratum from the now submerged or subconscious stratum on which the suggestion was originally impressed. And this message may take any one of the three leading forms mentioned above;--say a hallucinatory image of the hypnotiser or of some other person; or an impulse to perform some action; or a definite word or sentence to be written automatically by the waking self, which thus learns what order has been laid upon the hypnotic self while the waking consciousness was in abeyance.