As to the chief source of Solutrean influence, the same author remarks that, since this culture is entirely wanting in central and southern Spain, in Italy, in Sicily, in Algeria, and in Phœnicia, we should certainly not look to the Mediterranean for its origin but rather to eastern Europe; for in the grottos of Hungary we find a great development of the true Solutrean, while so far the Aurignacian has not been found here, although we do find traces of the earlier transitional stages below the levels of the true laurel-leaf points. We must admit, therefore, that in all probability the Solutrean culture reached Europe from the east and that its source is as mysterious as that of the Aurignacian, which, as we have seen, was of southern and probably of Mediterranean origin. It is not impossible that the evolution of the laurel-leaf point took place in Hungary, for it was certainly not evolved in central or western Europe. At Předmost, in Moravia, we observe an advanced Aurignacian industry which had adopted a Solutrean fashion in its spear heads. Here the laurel-leaf implements are few, while the implements of bone are abundant; but in the Solutrean stations of Hungary there are no bone implements. As the Solutrean technique comes to perfection the laurel-leaf spear head, so characteristic of the full Solutrean industry, is created and is met with in Poland, in Hungary, in Bavaria, and then in France, where the industry extends southward to the west and east of the central plateau. In France it appears quite suddenly in the Grotte du Trilobite (Yonne), and also in Dordogne and Ardèche, where the Proto-Solutrean types show marked impoverishment, both in the variety and in the execution of most of the flint implements, the only exception being the flattened spear heads, _pointes à face plane_, which show a regular Solutrean retouch, beautiful but monotonous. Laurel-leaf points discovered at Crouzade, Gourdan, and Montfort denote the presence of the true Solutrean culture, but this culture does not approach the stations in the neighborhood of Brassempouy. Toward the north the grotto of Spy, in Belgium, affords examples of Proto-Solutrean types, which have also been traced in several British caverns, but it is not certain that true Solutrean implements are found in Britain. In Picard a Proto-Solutrean layer has been found, but no laurel-leaf points. In the type station of Solutré in southeastern France Breuil discovered two Solutrean layers, quite different from each other: one rich in bone implements and graving-tools, with small flint laurel leaves retouched on only one face; the other poor in bone implements but with large laurel-leaf spear heads.