Every thing in Peru being now reduced to good order, the president gave permission to all the citizens and other inhabitants of the country, who had hitherto served in his army, to retire to their homes, to look after the re-establishment of their private affairs, which had, suffered great injury from the unavoidable losses experienced during the rebellion, and their own necessary expences in the field. He likewise sent off several officers with detachments upon new discoveries, and appointed the licentiate Carvajal lieutenant-governor of Cuzco, taking up his own residence at Lima, which was the seat of government. About this time an hundred and fifty Spaniards arrived at the city of La Plata, having travelled all the way from the mouth of the Rio Plata under the command of Domingo de Yrala to that part of the country which had formerly been discovered by Diego de Royas, and were now come into Peru to solicit the president to appoint some one to act as governor of the country on the Rio Plata which they proposed to settle. He accordingly nominated Diego de Centeno to that new government, with authority to raise as many more men as he could procure, to enable him to complete the discovery and conquest of that country. When all their preparations were completed, and they were on the point of setting out on the march, Centeno died, and the president appointed another captain in his place. The Rio Plata, or River of Silver, derives its source from the high mountains continually covered with snow which lie between the cities of Lima and Cuzco[40]. From these mountains four principal rivers flow, which derive their names from the provinces through which they pass. The Apurimac, Vilcas, Abancay, and Jauja. This last derives its source from a lake in the province of Bombon[41], the most level and yet the highest plain in all Peru, where accordingly it snows or hails almost continually. This lake is quite crowded with small islands, which are covered with reeds, flags, and other aquatic plants, and the borders of the lake are inhabited by many Indians. [Footnote 40: Zarate is extremely erroneous in his account of the sources of the Rio Plata. All the streams which rise from the Peruvian mountains in the situation indicated, and for seven or eight degrees farther south, and which run to the eastwards, contribute towards the mighty Maranon or River of the Amazons.--E.] [Footnote 41: This is an egregious mistake; the Rio Jauja rises from the lake of Chinchay Cocha in the province of Tarma, and runs _south_ to join the Apurimac. The river Guanuco rises in the elevated plain of Bombon, and runs _north_ to form the Gualagua, which joins the Lauricocha or Tanguragua.--E.]