Among the brothers of the Inca there was one named Tupac Ccapac, a principal man, to whom Tupac Inca had given many servants to work on his farms, and serve on his estates. It is to be understood that Tupac Inca made his brother visitor-general of the whole empire that had been conquered up to that time. Tupac Ccapac, in making the visitation, came to the place where his brother had given him those servants. Under colour of this grant, he took those and also many more, saying that all were his yana-cunas[109], which is the name they give to their servants. He persuaded them to rebel against his brother, saying that if they would help him he would show them great favours. He then marched to Cuzco, very rich and powerful, where he gave indications of his intentions.

[Note 109: Garcilasso de la Vega says that the meaning of Yanacona is "a man who is under the obligation to perform the duties of a servant." Balboa, p. 129, tells the same story of the origin of the Yanaconas as in the text. The amnesty was granted on the banks of the river Yana-yacu, and here they were called Yana-yacu-cuna, corrupted into Yana-cona. The Spaniards adopted the word for all Indians in domestic service, as distinguished from mitayos or forced labourers.]

He intended his schemes to be kept secret, but Tupac Inca was informed of them and came to Cuzco. He had been away at the ceremony of arming one of his sons named Ayar Manco. Having convinced himself that his information was correct, he killed Tupac Ccapac with all his councillors and supporters. Finding that many tribes had been left out of the visitation by him, for this attempt, Tupac Inca went in person from Cuzco, to investigate the matter and finish the visitation.

While doing this the Inca came to a place called Yana-yacu, which means "black water" because a stream of a very dark colour flows down that valley, and for that reason they call the river and valley Yana-yacu. Up to this point he had been inflicting very cruel punishment without pardoning any one who was found guilty either in word or deed. In this valley of Yana-yacu his sister and wife, Mama Ocllo, asked him not to continue such cruelties, which were more butchery and inhumanity than punishment, and not to kill any more but to pardon them, asking for them as her servants. In consequence of this intercession, the Inca ceased the slaughter, and said that he would grant a general pardon. As the pardon was proclaimed in Yana-yacu, he ordered that all the pardoned should be called Yana-yacus. They were known as not being allowed to enter in the number of servants of the House of the Sun, nor those of the visitation. So they remained under the Curacas. This affair being finished, the visitation made by Tupac Ccapac was considered to be of no effect. So the Inca returned to Cuzco with the intention of ordering another visitation to be made afresh.