Ruins of the Aqueduct of Rumiccolca

Until then I suggest as a possible working hypothesis that we have at Piquillacta the remains of a pre-Inca city; that its chiefs and people cultivated the Lucre Basin and its tributaries; that as a community they were a separate political entity from the people of Cuzco; that the ruler of the Cuzco people, perhaps an Inca, finally became sufficiently powerful to conquer the people of the Lucre Basin, and removed the tribes which had occupied Piquillacta to a distant part of his domain, a system of Page 141colonization well known in the history of the Incas; that, after the people who had built and lived in Piquillacta departed, no subsequent dwellers in this region cared to reoccupy the site, and its aqueduct fell into decay. It is easy to believe that at first such a site would have been considered unlucky. Its houses, unfamiliar and unfashionable in design, would have been considered not desirable. Their high walls might have been used for a reconstructed city had there been plenty of water available. In any case, the ruins of the Lucre Basin offer a most fascinating problem.

In the Oropesa Basin the most important ruins are those of Tipon, a pleasant, well-watered valley several hundred feet above the village of Quispicanchi. They include carefully constructed houses of characteristic Inca construction, containing many symmetrically arranged niches with stone lintels. The walls of most of the houses are of rough stones laid in clay. Tipon was probably the residence of the principal chief of the Oropesa Basin. It commands a pleasant view of the village and of the hills to the south, which to-day are covered with fields of wheat and barley. At Tipon there is a nicely constructed fountain of cut stone. Some of the terraces are extremely well built, with roughly squared blocks fitting tightly together. Access from one terrace to another was obtained by steps made each of a single bonder projecting from the face of the terrace. Few better constructed terrace walls are to be seen anywhere. The terraces are still cultivated by the people of Quispicanchi. No one lives Page 142at Tipon now, although little shepherd boys and goatherds frequent the neighborhood. It is more convenient for the agriculturists to live at the edge of their largest fields, which are in the valley bottom, than to climb five hundred feet into the narrow valley and occupy the old buildings. Motives of security no longer require a residence here rather than in the open plain.

While I was examining the ruins and digging up a few attractive potsherds bearing Inca designs, Dr. Giesecke, the President of the University of Cuzco, who had accompanied me, climbed the mountain above Tipon with Dr. Aguilar and reported the presence of a fortification near its summit. My stay at Oropesa was rendered most comfortable and happy by the generous hospitality of Dr. Aguilar, whose finca is between Quispicanchi and Oropesa and commands a charming view of the valley.

From the Oropesa Basin, one enters the Cuzco Basin through an opening in the sandstone cliffs of Angostura near the modern town of San Geronimo. On the slopes above the south bank of the Huatanay, just beyond Angostura, are the ruins of a score or more of gable-roofed houses of characteristic Inca construction. The ancient buildings have doors, windows, and niches in walls of small stones laid in clay, the lintels having been of wood, now decayed. When we asked the name of these ruins we were told that it was Saylla, although that is the name of a modern village three miles away, down the Huatanay, in the Oropesa Basin. Like Piquillacta, old Saylla has no water supply at present. It is not Page 143far from a stream called the Kkaira and could easily have been supplied with water by an azequia less than two miles in length brought along the 11,000 feet contour. It looks very much like the case of a village originally placed on the hills for the sake of comparative security and isolation and later abandoned through a desire to enjoy the advantages of living near the great highway in the bottom of the valley, after the Incas had established peace over the highlands. There may be another explanation.

It appears from Mr. Cook's studies that the deforestation of the Cuzco Basin by the hand of man, and modern methods of tillage on unterraced slopes, have caused an unusual amount of erosion to occur. Landslides are frequent in the rainy season.

Opposite Saylla is Mt. Picol, whose twin peaks are the most conspicuous feature on the north side of the basin. Waste material from its slopes is causing the rapid growth of a great gravel fan north of the village of San Geronimo. Professor Gregory noticed that the streams traversing the fan are even now engaged in burying ancient fields by “transporting gravel from the head of the fan to its lower margin,” and that the lower end of the Cuzco Basin, where the Huatanay, hemmed in between the Angostura Narrows, cannot carry away the sediment as fast as it is brought down by its tributaries, is being choked up. If old Saylla represents a fortress set here to defend Cuzco against old Oropesa, it might very naturally have been abandoned when the rule of the Incas finally spread far over the Andes. On the other hand, it seems more likely that the people who built Page 144Saylla were farmers and that when the lower Cuzco Basin was filled up by aggradation, due to increased erosion, they abandoned this site for one nearer the arable lands. One may imagine the dismay with which the agricultural residents of these ancient houses saw their beautiful fields at the bottom of the hill, covered in a few days, or even hours, by enormous quantities of coarse gravel brought down from the steep slopes of Picol after some driving rainstorm. It may have been some such catastrophe that led them to take up their residence elsewhere. As a matter of fact we do not know when it was abandoned. Further investigation might point to its having been deserted when the Spanish village of San Geronimo was founded. However, I believe students of agriculture will agree with me that deforestation, increased erosion, and aggrading gravel banks probably drove the folk out of Saylla.

The southern rim of the Cuzco Basin is broken by no very striking peaks, although Huanacaurai (13,427 ft.), the highest point, is connected in Inca tradition with some of the principal festivals and religious celebrations. The north side of the Huatanay Valley is much more irregular, ranging from Ttica Ttica pass (12,000 ft.) to Mt. Pachatucsa (15,915 ft.), whose five little peaks are frequently snow-clad. There is no permanent snow either here or elsewhere in the Huatanay Valley.

The people of the Cuzco Basin are very short of fuel. There is no native coal. What the railroad uses comes from Australia. Firewood is scarce. The ancient forests disappeared long ago. The only Page 145trees in sight are a few willows or poplars from Europe and one or two groves of eucalyptus, also from Australia. Cuzco has been thought of and written of as being above the tree line, but such is not the case. The absence of trees on the neighboring hills is due entirely to the hand of man, the long occupation, the necessities of early agriculturists, who cleared the forests before the days of intensive terrace agriculture, and the firewood requirements of a large population. The people of Cuzco do not dream of having enough fuel to make their houses warm and comfortable. Only with difficulty can they get enough for cooking purposes. They depend largely on fagots and straw which are brought into town on the backs of men and animals.

In the fields of stubble left from the wheat and barley harvest we saw many sheep feeding. They were thin and long-legged and many of the rams had four horns, apparently due to centuries of inbreeding and the failure to improve the original stock by the introduction of new and superior strains.