From this section we may infer, that the rock-shelter was used by man at the points H H and F before the formation of the stratum No. 2, which is probably merely subaerial rain-wash, due to the disintegration of the adjacent rocks, and that the sepulchral cavity was a place of burial either before, or while No. 2 was accumulated. Can we further conclude that there is any necessary connection between the refuse-heap and the sepulchre in point of time? M. Dupont holds that the contents of all the caves in the cliff are palæolithic, and that the sepulchral cavity is therefore of that age.[159] It seems to me, however, that the evidence in favour of this view is not conclusive. The burial place may have belonged to one people, and the refuse-heaps in the neighbouring caves and _outside_ the slab in the rock-shelter of the Trou du Frontal to another. The form of the urn is remarkably like some of those which have been obtained from the neolithic pile-dwellings of Switzerland, and therefore may possibly imply that the interment is of that age. The human remains were mixed _pêle mêle_ with stones and yellow clay within the chamber. Two skulls, sufficiently perfect to allow of measurement, show that their possessors were broad-headed (brachy-cephalic), and of the same type as those of Sclaigneaux. They are considered by the late Dr. Pruner-Bey to belong to the “type Mongoloide,” and are believed by M. Dupont to prove that the palæolithic inhabitants of Belgium were a Mongoloid race. They seem, however, to be of the same general order as the broad-skulls from the neolithic caves and tombs of France, and from the round barrows of Great Britain, as well as those from the neolithic tombs of Borreby and Moën in Scandinavia. And they are looked upon by MM. de Quatrefages, Virchow, and Lagneaux,[160] as presenting the same type as that which is to be recognized in the present population of Belgium, in the neighbourhood, for example, of Antwerp. These affinities may be explained by the view advanced by Dr. Thurnam, that the broad-heads of the British, French, and Scandinavian tombs are cognate with the modern Fin; or by the higher generalisation of Prof. Huxley, that the Swiss “Dissentis” skull, the South German, the Sclavonian, and the Finnish, belong to one great race of fair-haired, broad-headed, Xanthochroi “who have extended across Europe from Britain to Sarmatia, and we know not how much further to the east and south.”[161]