The Ynca was thus occupied for six or seven years, at the end of which time he thought it would be well to turn again to military exercises, and the extension of his dominions. He therefore ordered 20,000 armed men to be assembled, and with four experienced masters of the camp, to march towards Chincha-suyu, which is the northern division; under the command of the prince Ynca Rocca, his son. For the Yncas had not extended their sway in that direction beyond the limits reached by the first Ynca, Manco Ccapac. That boundary was at Rimac-tampu, seven leagues from the city. The northern division, being a rugged and thinly peopled country, the Yncas had not hitherto undertaken its conquest.

The prince and his army set out from Cuzco, reached the river Apurimac, and crossed it in great balsas which had been collected; and, the country being uninhabited, marched onwards to Curahnasi and Amancay, eighteen leagues from Cuzco. The few Indians of that neighbourhood were easily reduced. From the province of Amancay he advanced by the left hand of the high road from Cuzco to Rimac, and crossed the uninhabited region called Ccocha casa, which is twenty-two leagues wide. He then entered the province called Sura, which is populous, and rich in gold and in flocks. Here the Ynca was received peacefully, and obeyed as lord of the country. Thence he passed on to another province called Apucara, where he was also well received; and the reason that these provinces so readily submitted was that, being at enmity with each other, none of them was able singly to resist the Ynca.