Pedro de Cieza de León,
The travels of Pedro de Cieza de Léon…
“ There is little maize in this country on account of the cold, but there is no want of other provision by which the people are sustained. There are some islands and rocks in the lake, where the Indians form garrisons in time of war, and are thus safe from their enemies. Concerning the water which flows from this lake, it is held for certain that it forms the source of the famous river of La Plata, because it becomes a powerful river in the valley of Xauxa, and further on it is joined by the rivers of Parcos, Vilcas, Abancay, Apurimac, and Yucay. ”
