Again, our experience of the habits of rude and uncivilized peoples would naturally lead us to look to caves, as the places in which we should be likely to meet with the remains of the men who lived in Europe before the dawn of history. Such remains we do find that, placed side by side with others from the tombs and dwellings, enable us to discover some, at least, of the races who lived in Europe in long-forgotten times, and to ascertain roughly the sequence of events in the remote past, far away from the historical border. It may, indeed, seem a hopeless quest to recover what has been buried in oblivion so long, and it is successful merely through the careful comparison of the human skeletons in the caves and tombs of Britain, France, and Spain, with those of existing races, and of the implements and weapons with those which are now used among savage tribes. By this means we shall see that there are good grounds for extending the range of the Iberian people over a considerable area in Europe, and for the belief that the Eskimos once lived as far south as Auvergne. In discussing both these problems it will be impossible to shut our eyes to the continuity that exists between geology, archæology, biology, and history--sciences which at first sight appear isolated from each other. The bones of the domestic animals in the caves will necessarily lead to the further examination of the appearance and disappearance of breeds under the care of man. And this complicated question has an important bearing not merely on the ethnology, but also on the history, of some of the European peoples. It must be admitted, however, that this branch of the subject is, as yet, known merely in outline, and we can only hope to ascertain a few facts which may form a basis for future investigation.