In so far as those who are open to the less well-defined and more ambitious region are ignorant or unresponsive to what has been achieved in the material realm, it is no wonder that their asserted enlargement of scope is not credited. It does not seem likely that a new revelation has been vouchsafed to them, when they are so ignorant concerning the other and already recognised kind of Natural knowledge. They cannot indeed have attained information through the same channels, or in the same way. And it is this dislocation of knowledge, this difference of atmosphere, this barely reconcilable attitude of two diverse groups of people--though occasionally, by the device of water-tight compartments, the same individual has breathed both kinds of air and belonged to both groups--it is this bifurcation of method that has retarded mutual understanding. There are pugnacious members of either group who try to strengthen their own position by decrying the methods of the other; and were it not for the occurrence from time to time of a Wallace or a Crookes, _i.e._ of men who combine in their own persons something of both kinds of knowledge, attained not by different but by similar methods--all their theses being maintained and justified on scientific grounds, and after experimental inquiry--the chances for a reasonable and scientific outlook into a new region, and ultimately over the border-line into the domain of religion, would not be encouraging. The existence of such men, however, has given the world pause, has sometimes checked its facile abuse, and has brought it occasionally into a reflective, perhaps now even into a partially receptive, mood. We need not be in any hurry, though we can hardly help hoping for quick progress if the new knowledge can in any way alleviate the terrible amount of sorrow in the world at present; moreover, if a new volume is to be opened in man's study of the Universe, it is time that the early chapters were being perused. It may be asked, do I recommend all bereaved persons to devote the time and attention which I have done to getting communications and recording them? Most certainly I do not. I am a student of the subject, and a student often undertakes detailed labour of a special kind. I recommend people in general to learn and realise that their loved ones are still active and useful and interested and happy--more alive than ever in one sense--and to make up their minds to live a useful life till they rejoin them. What steps should be taken to gain this peaceful assurance must depend on the individual. Some may get it from the consolations of religion, some from the testimony of trusted people, while some may find it necessary to have first-hand experience of their own for a time. And if this experience can be attained privately, with no outside assistance, by quiet and meditation or by favour of occasional waking dreams, so much the better.