The Chimu dominion extended probably from Tumbez, in the extreme north of the Peruvian coast, to Ancon, north of Lima. The Chimus also had a strong colony in the valley of Huarcu, now called Cañete. But the valleys of the Rimac, of Lurin, Chilca, and Mala, north of Cañete; and those of Chincha, Yca, and Nasca, south of Cañete; were not Chimu territory. The names of places in those valleys are all Quichua, as well as the names of their chiefs, as recorded by Garcilasso de la Vega and others. The inhabitants were, therefore, of Inca race, probably colonists from the Huanca nation. Their superstitions as told by Arriaga, and the curious mythological legends recorded by Avila as being believed by the people of Huarochiri and the neighboring coast, all point to an Inca origin. These Inca coast people are said to have had a famous oracle near the present site of Lima, called “Rimac,” or “He who speaks.” But more probably it was merely the name given to the noisy river Rimac, babbling over its stones. It is true that there was a temple on the coast with an oracle, the fame of which had been widely spread. The idol called Pachacamac, or “The world-creator,” was described by the first Spanish visitor, Miguel Estete, as being made of wood and very dirty. The town was then half in ruins, for the worship of this local deity was neglected after the conquest by the Incas. These coast people of Inca race were as industrious as their Chimu neighbors. In the Nasca valley there is a complete network of underground watercourses for irrigation. At Yca “they removed the sand from vast areas, until they reached the requisite moisture, then put in guano from the islands, and thus formed sunken gardens of extraordinary richness.”[1309] Similar methods were adopted in the valleys of Pisco and Chilca.