which were found on the banks of this river were inhabited by the Mayo Indians, who now form a branch of the linguistic stock of the Yaqui, or Hyaquin. Cebreros crossed the Mayo, proceeded in 1532 into the present Sonora, and although he had hardly twenty men reached the Rio Yaqui. He did not venture to go farther than to the north bank of that river, but returned to Sinaloa. The Indians there were in active revolt, and the Spaniards had great difficulty in maintaining themselves in the weak settlement of San Miguel Culiacan. They had found on their northern excursions fertile intervales inhabited by warlike tribes. Beyond these tribes lived a people who built their houses of clay. Still farther north another wonder-story invited them, which promised more than the most fertile intervale, more than the most civilized Indian settlements. The account of Indians in Sonora who lived in large houses of clay was true, for it referred to the southern Pimas. But the story that attracted the Spaniards to the north was the legend of the "Seven Cities."
