"I am not inclined to conclude that man had no existence at all before the epoch of the great revolutions of the earth.... He might have inhabited certain districts of no great extent, whence, after these terrible events, he repeopled the world; perhaps, also, the spots where he abode were swallowed up, and his bones lie buried under the beds of the present seas." The confident appeals which have been made to Cuvier's authority against the high antiquity of man are, therefore, not justified by the facts. A second and more decisive step in advance was taken by the discovery of shaped flints and other implements belonging to primitive man, existing in diluvial beds. In 1826, M. Tournal, of Narbonne, a French archæologist and geologist, published an account of the discoveries which he had made in a cave in the department of Aude, in which he found bones of the bison and reindeer fashioned by the hand of man, accompanied by the remains of edible shell-fish, which must have been brought there by men who had made their residence in this cave. Three years afterwards, M. de Christol, of Montpellier, subsequently Professor in the University of Science of Grenoble, found human bones intimately mixed up with remains of the great bear, hyæna, rhinoceros, &c., in the caverns of Pondres and Souvignargues (Hérault). In the last of these caverns fragments of pottery formed a part of the relics. All these striking facts were put together and discussed by Marcel de Serres, Professor in the University of Science at Montpellier, in his 'Essai sur les Cavernes.' The two bone-caverns of Engis and Enghihoul (Belgium) have furnished proofs of the same kind. In 1833, Schmerling, a learned Belgian geologist, discovered in these caverns two human skulls, mixed with the teeth of the rhinoceros, elephant, bear, hyæna, &c. The human bones were rubbed and worn away like those of the animals. The bones of the latter presented, besides, traces of human workmanship. Lastly, as if no evidence should be wanting, flints chipped to form knives and arrow-heads were found in the same spot. In connection with his laborious investigations, Schmerling published a work which is now much esteemed, and proves that the Belgian geologist well merited the title of being the founder of the science of the antiquity of man. In this work Schmerling describes and represents a vast quantity of objects which had been discovered in the caverns of Belgium, and introduced to notice the human skull which has since become so famous under the name of the _Engis skull_. But at that time scientific men of all countries were opposed to this class of ideas, and thus the discoveries of the Belgian geologist attracted no more attention than those of his French brethren who had brought forward facts of a similar nature.