There is a mystery about the civilisation of the ancient Aymaras, which cannot now be solved. The origin and history of the extensive unfinished ruins at Tiahuanaco, near the southern shore of lake Titicaca, will for ever remain a secret; but there can be no doubt that a people who could form so magnificent a design, convey such huge blocks of stone from great distances, hew out the enormous monolithic doorways, and carve them with such minuteness of ornamental detail, must have been numerous, and civilised.[60] There are also remains of Aymara burial places in various parts of the Collao, especially on the peninsula of Sillustani, which consist of towers of hewn masonry.[61] We learn from Cieza de Leon that the Aymaras observed the movements of the sun and moon, and divided their year into ten months. He considered them to be a very intelligent people. He gives an account of their funeral ceremonies,[62] and a very interesting description of a harvest home among the Aymaras,[63] and states that they were often engaged in civil wars.[64] The Aymara language, which is still in common use on the banks of lake Titicaca, though identical with Quichua in grammatical construction, has a distinct vocabulary.[65] It is worthy of remark, however, that though the first few numerals in Aymara are indigenous, all the higher numbers are borrowed from the Quichua.[66] Next to the Quichuas, the Aymaras were by far the most important and civilised people in the Peruvian Andes; and though their climate and soil was against them, there is some ground for the opinion that their civilisation, such as it was, boasts of an origin more ancient than that of the Quichuas. But all such speculations are mere conjecture.

In the rich valleys and on the grassy mountain sides of the Central Peruvian Andes, to the westward of the Quichuas, dwelt three nations which were called by their future conquerors—the Chancas, Pocras, and Huancas.[67] They inhabited the districts now known as Abancay, Andahuaylas, Guamanga, and Xauxa. Little or nothing is known of their history anterior to their absorption into the empire of the Yncas, and if they had a distinct language, it must have been either very barbarous or very closely allied to Quichua, for no vestige of it has survived.[68] All the ruins which might have enabled us to form an idea of their skill in building, such as the temple of Huarivilca in the valley of Xauxa,[69] have entirely disappeared. It appears, however, that they were very fierce and warlike, that each village had a fortress, and that they made a desperate struggle for independence before they were finally subjugated by the Quichuas.[70]

North of Xauxa, the valleys and plateaux of the Cordillera were inhabited by the Conchucos, and by the Indians of Huamachuco, Caxamarca, Chachapoyas, and Bracamoras. This brings us to the frontier of Quito. The tribes of northern Peru are also said to have been warlike, and to have been incessantly engaged in feuds with each other.[71] They are described as intelligent industrious agriculturists, with some knowledge of the courses of the heavenly bodies, and the same customs of burying their dead and worshipping huacas in the form of stones or other natural objects, as prevailed among the masses of the Quichua people.[72]

We now come to the inhabitants of the numerous isolated fertile tracts on the Pacific coast, who were all known by the Yncas, as Yuncas or “dwellers in the warm valleys.”[73]

The Peruvian coast has been, geologically speaking, recently upheaved from the sea. It is a narrow strip of land, averaging a breadth of from ten to forty miles, confined on one side by the ocean, on the other by the magnificent Andes, which rise abruptly from the plains. The whole of this region consists of sandy desert, intersected by ranges of rocky hills, except where a stream flows down from the mountains to the sea, and forms an oasis of verdure and fertility. These pleasant valleys are in some parts of the coast of frequent occurrence, and are only separated by narrow strips of sand; while in others the trackless deserts extend for nearly a hundred miles without a break. It scarcely ever rains on the Peruvian coast, but a heavy dew, during part of the year, falls on the valleys.

The most ancient traces of the American race have been found on the Pacific coast, in the shape of middings or refuse heaps, similar to those in Denmark. These middings, which have been examined by Mr. Spruce at Chanduy and Amotape, consist of fragments of pottery, sea shells, and crystal quartz cutting instruments.[74] They are the remains of a very ancient people of what is called, in European archæology, the stone age; and they suggest the possible existence of man in South America, contemporaneously with the post-pleistocene fossil vicuña of Corocoro. Be this how it may, there can be no doubt that the coast valleys of Peru had been inhabited for many centuries by Indian communities, which had made gradual progress in the improvement of their condition. Every part of these valleys, which could be reached by irrigation, was very fertile. Where irrigation ceased the desert commenced. The irrigated parts contained fields of cotton, of yucas, of maize, of aji pepper, of sweet potatoes, and of gourds; which were shaded by fruit trees festooned with passion flowers,[75] and by groves of algoroba (Prosopis horrida), of a sort of willow, and of the beautiful suchi (Plumieria). The most important traces of ancient civilisation are met with in the most extensive valleys, where the population was denser than in the smaller and more isolated oases.

The ancient works of irrigation in these valleys, now in ruins, excite the admiration of civil engineers who come to Peru to draw up schemes for imitating them.[76] Every square foot of land was under cultivation, none was wasted even for the sites of villages and temples, which were always built on the verge of the desert, or on the rocky spurs of the maritime cordillera, overlooking the algoroba woods, the groves of fruit trees, and the rising crops.[77] The fields were carefully manured, as well as watered by means of irrigating channels. In the valley of the Chilca they raised crops of Indian corn by putting two sardine heads into each hole with the grain, and thus the fish served for manuring the crops as well as for food.[78] The guano on the islands off the coast was also utilised as manure.[79] The houses were built of huge adobes, or bricks baked in the sun, with flat roofs of reed, plastered with mud; and the people were clothed in cotton dresses, which were very skilfully woven.[80] Their pottery was quite equal to that of the Quichuas, but at the same time clearly original in design; the vessels being made to imitate shells, fruit, fish, and other objects, which were familiar to the natives of the coast.

The great ruins at Caxamarquilla, at Pachacamac,[81] and of the Gran Chimu near Truxillo,[82] still afford evidence of the civilisation of the Yunca Indians, and of the wealth and power of their chiefs. The people were warlike, and the tribe inhabiting the Chincha valley is even said to have made incursions far into the heart of the Andes.[83] In the valley of the Rimac there are mounds or artificial hills of immense size, which appear to have been intended to afford protection against their enemies to the feudal lords; and to serve as a place of retreat for their retainers. A collection of ruins is almost always found at their feet, which formed the village of the tribe. Cieza de Leon gives a detailed account of the manners and customs of these Yunca chiefs, and of their subjects.[84] Nearly every valley had its independent chief and separate tribe; although some of the more powerful chiefs, such as the Grand Chimu, the Chuqui-mancu of the Rimac, and the Lord of Chincha, had extended their dominion over several valleys. The language of the coast was quite distinct from Quichua.[85]

In many parts of the coast the aboriginal Indians have been exterminated by Spanish cruelty, in others they have disappeared through frequent crosses with negroes, in others they have entirely lost, with their native language, all traces of the distinctive character which once marked their ancestors. It is exceedingly important, therefore, to obtain authentic information concerning any of the coast tribes which have retained their language and national characteristics; and the memoranda collected by Mr. Spruce at Piura, on this subject, which will be found in the accompanying note, contain some particulars of great interest.[86]

It will be natural to inquire whether a race, which had for centuries inhabited the valleys on the Pacific coast, had habitually navigated the ocean which was always in sight; and we find that they occasionally did venture to sea for fish, and that they undertook coasting voyages. The crooked algorobas, the willows, and fruit trees, afforded no suitable timber for boat-building; but the Yuncas supplied the place of timber by going afloat on inflated sealskins.[87] In this way they passed to and fro from the shore to the Guano islands, and, according to Acosta, they even went on long voyages to the westward.[88]