THE DATING OF EARLY HUMAN REMAINS. 41 It is true that we are always liable to be mistaken in taking things at their face value. Within reasonable limits, it is right and proper to bear in mind how easily our opinion may be mistaken. Nevertheless there is a point at which an attitude of sound criticism tends to overbalance itself, and become that of inverted caution. In the dating of early human remains, we are all a little afraid of saying that the evidence points to a comparatively modern interment, in case our opinion should be mistaken. I think that our overwhelming fear should be entirely on the other side. The influence of this intellectual motive force of inverted caution is also found where problems of uncertain human implements are concerned. We are all more or less imbued with the idea that when we are presented with a chipped flint we must consider it to be a human implement unless we are able to follow out the exact process by which it has been made by natural—that is, non-human—agencies. In speaking in these various connections of our being "all" more or less swayed by the current intellectual force of the day, I do not by any means exclude myself. One feels the influence of such forces upon oneself, no less than one sees their influence upon others. My own papers upon the critical side of this eolithic question to some extent imply the point of view that is referred to above, because it is practically the only way in which the subject can be met at the present time. And of course, if we can explain how a disputed flint has become acci- dentally chipped, our scepticism becomes assured, but I question the soundness of the position which claims the necessity for so doing. In the case of a thing which admittedly presents great difficulties of exact determination, it appears to me to be the normal attitude of caution to assume it to be natural until it can be proved to be otherwise—not to assume it to be human unless it can be proved to be natural. I cannot enter further into the burning question of the eoliths at the present time, although its influence is far-reaching upon the problems of our present enquiry. For if a flint-working industry which is the product of a truly human intelligence extends back to the Oligocene or Eocene periods, this fact must profoundly modify our outlook upon the problems presented