I have always thought that there was nothing of a supernatural order in these phenomena. My conclusions have not changed; but let us understand the meaning of this expression. I do not mean to say that these phenomena are always in accordance with nature’s laws such as we understand them to-day. I am certain that we are in the presence of an unknown force; its manifestations do not seem to obey the same laws, as those governing other forces more familiar to us; but I have no doubt they obey some law, and perhaps the study of these phenomena will lead us to the conception of laws more comprehensive than those already known. Some future Newton will discover a more complete formula than ours. My position, therefore, seems to me to be well defined. I have held myself aloof from those who denied upon bias, and also from those who asserted too rashly. I have remained within the margin of science. I have endeavoured to bring to bear upon my experiments methods of scientific observation. I wish to go in neither for occultism, nor for spiritism, nor for anything mysterious or supernatural. Many who know me imperfectly may think that I have given reins to my imagination, that I am an adept in theosophy, neo-martinism, or spiritism. Such is not the case. I seek, and I have found-very little; others have been more fortunate than I. Some day perhaps I shall have the same good luck. But I shall not touch upon what others have done, save as an accessory; I shall only speak of what I myself have seen and what I myself think. My book is the statement of a witness—it has no other signification. One word in conclusion. A great number of my experiments have been made with people who wish to preserve their incognito. I have never been wanting in discretion when this was asked of me, and have never disclosed the names of those who placed their confidence in me, permitting me to experiment with them whilst desirous of remaining unknown. I have sometimes found very remarkable mediums among these anonymous experimenters. Some of my sittings with them have been truly admirable on account of the clear, distinct nature of the phenomena obtained. I beg these trusting friends to accept my heartfelt thanks.