Our will, I have said. And this is in fact the fundamental idea we have gathered out of this subject of a physical agent. It is this which characterizes it, and it is this also which compromises it in the eyes of a good many folks. They might, perhaps, be resigned to a new agent, if it were the necessary and exclusive product of the hands forming the chain, if only it were true that certain positions or certain acts insured its manifestation. But this is not the case with it: the mental and the physical must combine in order to give it birth. Here are hands that tire themselves out in forming the chain, and yet obtain no movement: the will has not been mingled in the act. Here is a will that commands in vain: the hands have not been placed in a suitable position. We have thrown light upon both these sides of the phenomenon, for they are both essential. Another fact has been noted by us, and ought to enter into a description of the physical agent in question: this agent inheres in the persons and not in the table. Let the operators, when they are in rapport, pass to a new table and encircle it: they will be able immediately to exercise all their authority over it; their will will continue to dispose of the physical agent and to make use of it for rapping numbers mentally selected by persons present or for producing movements without contact. Such are the facts. The explanation of them will come later. It is, however, very natural to want to find this at once, and to make hypotheses which may be regarded as possible, if not true. I have taken the risk of doing this, and I do not repent of it. Was it not imperative to prove to our opponents that they have not even the pretext of "a scientific impossibility"? Hypotheses have their legitimate place and their utility, even if they are incorrect. If they are admissible in themselves, that is sufficient, for that defends the facts to which they are applied from the accusation of monstrosity. The critic has no longer the right to demand the previous question. Seeing that it was asked for on all sides, I have risked the following statement: