This intermediate area, in which the control is liable to vary, and be thrown on to one side or the other, also has an analogy in the _hypnoidal state_ of Boris Sidis--this being an intermediate state (so it is thought) which is convertible either into ordinary sleep, on the one hand, or into hypnotic sleep on the other. It all depends upon how this state is handled and controlled. It may be the same here; the medium may sink into internal reverie, or introspective trance; or she may be converted into a genuine "medium" by some influence exerted upon her from without. 20. On this theory, the deeper the trance the greater the control by the "spirit," and this corresponds very well with what has been said before. There are always a number of obstacles to clear communication, and the degree to which these are overcome would represent the degree of clearness of the communications. The process of transferring a mental picture to the medium may be attended with all kinds of difficulties of which we know nothing. Assuming, for the sake of argument, that there is a sort of etheric body, or double, and that this is in any way involved in the process, we might have the following "difficulties" to encounter: The difficulty in picturing the event clearly in the communicator's mind; difficulty in transferring it to the light; difficulty in getting this transferred to the medium's physical body; the difficulty of manipulating the latter. We know that we often have great difficulty in manipulating our own bodies properly; and, in paralysis and kindred affections, we are unable to do so at all. Yet we are thoroughly familiar with our own bodies, and know how they work. How much more difficult would it be if we were suddenly transplanted in _another_ person's body, and had to manipulate _that_? We should have to "learn the ropes," so to say; and all the little automatic tricks, and habits, and slips of speech, and what not, would be liable to slip out without our consent and before we knew it. We should "inherit," in fact, its whole psychological and physiological "setting." This being the case, we may readily see how difficult it would be for a discarnate spirit to manipulate another organism; and how likely it would be to allow certain tricks and habits of the medium herself to slip through, without being able to control them. As one communicator said, through Mrs. Chenoweth: "I do not like those 'don'ts'; they are hers, not mine." Here is a clear recognition of the difficulty involved in controlling the organism, and this is greatly accentuated when we remember that all such communications must be given when the _soi-disant_ communicator is in a constrained mental attitude--"gripping the light," "hanging on to the medium's body," while giving the communications. There is a double strain involved; and, as Dr. Hyslop said: "With what facility could I superintend the work of helping a drowning person and talk philosophy at