Difficult! Ay, and for a thousand reasons. First of all because it is the fashion of to-day to look upon these facts as unworthy of science. I acknowledge taking a delicate pleasure in comparing the different opinions which many young Savants (I beg the printer not to forget a very big capital S) bring to bear upon their contemporaries. Here is a man surrounded by deferential spectators: solemnly he hands a paper-knife to a sleeping hysterical subject, and gravely invites him to murder such or such an individual who is supposed to be where there is really only an empty chair. When the patient springs forward to carry out the suggestion, and strikes the chair with the paper-knife, the lookers-on behold a scientific fact, according to classical science. On the other hand, here is another man who, not a whit less solemnly, makes longitudinal passes upon his subject, puts him to sleep, and then tries to exteriorise the said subject’s sensibility; but the onlookers in this case are not recognised as witnessing a scientific fact! I have never been able to see wherein lies the difference between these two experimenters, the one experimenting with an hysterical subject more or less untrustworthy, the other examining a phenomenon which, if it be true, may be observed without the necessity of trusting oneself solely to the honesty of the individual asleep. In fact there is a most intolerant clique among savants. Facts it seems are of no importance when pointed out by those who stand beyond the pale of official science. Unfortunately, psychical phenomena cannot be as easily and readily demonstrated as the X-rays or wireless telegraphy, incontestable facts which any one can prove to his entire satisfaction. Therefore young savants rejoice in making an onslaught on those who apply themselves to the study of these phenomena. It was the same thing in olden times when budding theologians made their _débuts_ in the arena of theology against notorious arch-heretics, Arians, Manicheans, or gnostics. _Nil novi sub sole._ * * * * *