Thus we see that by the close of the period of Aurignac, about 11,000 /B.C./, we have three groups of long-headed men in Celtic lands, and that, though they overlap, they are tending to obtain for themselves definite areas of distribution. During the closing years of the Aurignacian period the climate had been getting milder and perhaps drier, and steppe conditions prevailed over much of France and still more further east. Herds of horses arrived and were hunted for food and the _saiga_, a kind of antelope, was found as far south as the Dordogne, if not beyond, during the succeeding Solutrean period. These Steppe conditions are more characteristic of the latter period,[42] when France was invaded by a new people, not given, as far as we know, to artistic efforts, but who were able to fashion very skilfully made weapons of flint to aid them in chasing the beasts of the steppe.[43] The fact that skulls of our third group the Combe Capelle, are more common during this period and have only been found during the later phases of the previous age, when, as we have seen, steppe conditions were already approaching, leads us to suspect that it is to this type of man that we must attribute the invasion of Celtic lands which took place at this time. The Cromagnon men seem to have retreated to the south-west and to have taken refuge in the fastnesses of the Pyrenees,[44] while the invading hunters dominated the southern part, at least, of the Celtic lands. But towards 9,500 /B.C./ the climate began again to deteriorate, and the steppe conditions passed gradually to those of tundra. The steppe animals retreated to the east, towards South Russia and Turkestan, and most of the men of Solutré, who hunted them for food, seem to have followed in their wake. It seems doubtful whether the Solutrean invasion reached Britain, though implements of this type are said to have been found here,[45] and Proto-Solutrean stations are reported as occurring in England.[46] It has been claimed recently that this type reached the south of Sweden,[47] but this view is not generally accepted in that country.[48] On the departure of the Solutrean invaders the remnant of the aborigines, who had fled to the mountains in the south-west, and there developed their art to a much greater pitch of perfection, now returned to France, and once again, as the men of La Madeleine, became the dominant race in Celtic lands. It seems possible that some of their comrades had fled north to Britain on the arrival of the men of Solutré, and had survived there throughout this period, for, though no industry has been found in the British Isles which can accurately be described as that of La Madeleine,[49] in the strict French meaning of that term, we do find traces of the culture of Aurignac, persisting perhaps until still later times.