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66 region. The ten original ayllus were the old guard, round which the rest of the army was formed. The exercises were continuous, and the Inca's son, Vicaquirau, and nephew, Apu Mayta, the two greatest generals the American race has produced, were trained under the eye of the Inca Rocca. It was their prowess and military skill that, during the three following reigns, created the empire of the Incas.

In all respects Inca Rocca appears to have been the pioneer of empire. The last recorded appearance of the lady Siuyacu was when she urged her son to lose no time in suppressing the vicious and slothful habits of the people. He made severe laws with this object, which were rigorously enforced. He also erected schools called Yacha-huasi to train youths as accountants, and recorders of events. The walls of the Inca's schools still resist the efforts of time. The grand city of later Incas was commenced under the auspices of Rocca. The torrents of Huatanay and Rodadero, rushing down the ravines on either side of the Sacsahuaman hill, had hitherto periodically overflowed their banks, and there were ponds and swamps, one of them on the site of the present cathedral of Cuzco. The Inca Rocca confined the torrents within solid walls, drained the site of the future city, and led off conduits to irrigate the valley. Thus the surrounding country, by a system of terrace cultivation and irrigation, was enabled to support a much larger population.