have access to it only at the spot that is most remote from their habits and most unknown to their propensities, for there is nothing in the world about which animals trouble less than figures. But is this not, perhaps because we do not see what goes on elsewhere? It so happens that the infinite mystery of numbers can sometimes be expressed by a very few simple movements which are natural to most animals; but there is nothing to tell us that, if we could teach the horse and the dog to attach to these same movements the expression of other mysteries, they would not draw upon them with equal facility. It has been successfully attempted to give them a more or less clear idea of the value of a few figures and perhaps of the course and nature of certain elementary operations; and this appears to have been enough to open up to them the most secret regions of mathematics in which every question is answered beforehand. It is not wholly illusive to suppose that, if we could impart to them, for instance, a similar notion of the future, together with a manner of conveying to us what they see there, they might also have access to strange visions of another class, which are jealously kept from us by the too-watchful guardians of our intelligence. There is an opportunity here for experiments which will doubtless prove exceedingly arduous, for the future is not so easily seen and above all not so easily interpreted and expressed as a number. It is possible, moreover, that, when we know how to set about it, we shall obtain most of the human mediumistic phenomena; rapping, the moving of objects, materialization even and Heaven knows what other surprises held in store for us by that astounding subliminal to whose fancy there appears to be no bounds. In any case, if we accept the divining of numbers, as we are almost forced to do, it is almost certain that the divining of other matters must follow. An unexpected breach is made in the wall behind which lie heaped the great secrets that seem to us, as our knowledge and our civilization increase, to become stronger and more inaccessible. True, it is a narrow breach; but it is the first that has been opened in that part of the hitherto uncrannied wall which is not turned towards mankind. What will issue through it? No one can foretell what we may hope. 37