It sometimes happens, however, that the desire for communication is from the other side, and that an entity of the class we are considering has something which it specially desires to say to those whom it has left behind. Occasionally this message is an important one, such as, for example, an indication of the place where a missing will is concealed; but more often it seems to us quite trivial. Still, whatever it may be, if it is firmly impressed upon the mind of the dead person, it is undoubtedly desirable that he should be enabled to deliver it, as otherwise the anxiety to do so would perpetually draw his consciousness back into the earth-life, and prevent him from passing to higher spheres. In such a case a psychic who can understand him, or a medium through whom he can write or speak, is of real service to him. It should be observed that the reason why he cannot usually write or speak without a medium is that one state of matter can ordinarily act only upon the state next below it, and, as he has now no denser matter in his organism than that of which the Kamarupa is composed, he finds it impossible to set up vibrations in the physical substance of the air or to move the physical pencil without borrowing living matter of the intermediate order contained in the etheric double, by means of which an impulse can readily be transferred from the one plane to the other. Now he would be unable to borrow this material from an ordinary person, because such a man's principles would be too closely linked together to be separated by any means likely to be at his command, but the very essence of mediumship is the ready separability of the principles, so from a medium he can draw without difficulty the matter he needs for his manifestation, whatever it may be. When he cannot find a medium or does not understand how to use one he sometimes makes clumsy and blundering endeavours to communicate on his own account, and by the strength of his will he sets elemental forces blindly working, perhaps producing such apparently aimless manifestations as stone-throwing, bell-ringing, etc. It consequently frequently happens that a psychic or medium going to a house where such manifestations are taking place may be able to discover what the entity who produces them is attempting to say or do, and may thus put an end to the disturbance. This would not, however, invariably be the case, as these elemental forces are occasionally set in motion by entirely different causes.