The tribes over whom they ruled are still to be found, though in diminished numbers, and debased by the cruel system of oppression under which they long groaned. The native inhabitants of the central region of the Andes are known as the Quichuas, and their chief characteristics are common to the greater number of the tribes along the whole extent of the range. Though the languages of the different tribes vary, they are probably derived from the same source. The head of the Quichua is an oblong longitudinal, somewhat compressed at the sides. He has a low and very slightly arched forehead; a prominent, long, aquiline nose, with large nostrils. The mouth is large, and the teeth very fine, while the lips are not thick; the chin is short, but not receding; cheek-bones not prominent, eyes horizontal and never large, eyebrows long, the hair jet-black--and, though thick, straight and coarse, yet soft. He has little or no beard. In stature they seldom reach five feet. The chest is long, broad, deep, and highly arched. The hands and feet are small. The colour is between olive, brown, and bronze,--somewhat like that of the mulatto. Though their chests are broad, and their shoulders square, their arms are weak--their chief strength existing in their backs and legs. Mild, generous, and submissive, they have existed when a fiercer race would have been exterminated; but, on several occasions, they have shown that they can be goaded into revolt. About the year 1770, under Tupac Amaru, they broke into rebellion, when, had they possessed better arms and more discipline, they might, with the courage they exhibited, have driven the Spaniards from the country. The rebellion was put down with the atrocious cruelties to which the Spaniards have invariably subjected this unhappy race. On the eastern slopes of the Andes are found savage tribes, wearing few or no clothes, painting their skins, and ornamenting themselves with the coloured feathers of birds. Towards the southern end of Chili, the fierce Araucanians inhabit the mountains. Beyond them are the large-limbed Patagonians, clothed in skins; and at the extreme end, the wretched Fuegans, living in nearly a state of nature, on seals and fish. The race supposed to have been the most civilised before the time of the Incas were the Aymaras, whose descendants still inhabit the shores of Lake Titicaca. Their language differs from the Quichua, though evidently a sister-tongue. This expanse of water, already mentioned, is about eighty miles long and forty broad. Numerous rivers flow into it; in some places it is very deep, but in others so shallow that there is only just room to force the balsas through the rushes. It abounds in fish of peculiar form, and in aquatic birds. Several islands rise above its surface. That of Titicaca, from which it takes its name, is most celebrated.