CLAIRVOYANCE IN SPACE: INTENTIONAL. We have defined this as the capacity to see events or scenes removed from the seer in space and too far distant for ordinary observation. The instances of this are so numerous and so various that we shall find it desirable to attempt a somewhat more detailed classification of them. It does not much matter what particular arrangement we adopt, so long as it is comprehensive enough to include all our cases; perhaps a convenient one will be to group them under the broad divisions of intentional and unintentional clairvoyance in space, with an intermediate class that might be described as semi-intentional--a curious title, but I will explain it later. As before, I will begin by stating what is possible along this line for the fully-trained seer, and endeavouring to explain how his faculty works and under what limitations it acts. After that we shall find ourselves in a better position to try to understand the manifold examples of partial and untrained sight. Let us then in the first place discuss intentional clairvoyance. It will be obvious from what has previously been said as to the power of astral vision that any one possessing it in its fulness will be able to see by its means practically anything in this world that he wishes to see. The most secret places are open to his gaze, and intervening obstacles have no existence for him, because of the change in his point of view; so that if we grant him the power of moving about in the astral body he can without difficulty go anywhere and see anything within the limits of the planet. Indeed this is to a large extent possible to him even without the necessity of moving the astral body at all, as we shall presently see. Let us consider a little more closely the methods by which this super-physical sight may be used to observe events taking place at a distance. When, for example, a man here in England sees in minutest detail something which is happening at the same moment in India or America, how is it done? A very ingenious hypothesis has been offered to account for the phenomenon. It has been suggested that every object is perpetually throwing off radiations in all directions, similar in some respects to, though infinitely finer than, rays of light, and that clairvoyance is nothing but the power to see by means of these finer radiations. Distance would in that case be no bar to the sight, all intervening objects would be penetrable by these rays, and they would be able to cross one another to infinity in all directions without entanglement, precisely as the vibrations of ordinary light do.