. 168 



which crosses the Rio Ynambari, stretches on the south-east 

 towards the lofty Cordilleras * of Vilcaonota and Lampa> 

 and separates the Peruvian districts of Pancartambo and 

 Tinta from the district of Apolobamba, and the basin of the 

 lake of Titicaca (Chucuito) 5 sixthly, from the 16° of south 

 latitude, the western chain of the Andes, bordering the ba- 

 sin of the lake of Titicaca, towards the west, and dividing 

 by the parallel of 20° the tributary streams of the Desagua- 

 dero from the small Laguna of Paria, and those of the Rio 

 Pilcomayo from the torrents that throw themselves into the 

 South Sea. According to these limits, Peru on the north 

 (as far as the Javary), is 200 leagues in width, and as far as 

 the Rio de la Madeira and Mamore, 260 leagues in the di- 

 rection of the parallels of latitude ; while towards the south- 

 ern extremity of the country, its mean breadth is not more 

 than from 15 to 18 leagues. The partido of Tarapaca (in 

 the intendancy of Arequipa) reaches the desert of Atacama, 

 or the mouth of the Rio de Loa, which is placed by the ex- 

 pedition of Malaspina in 21° 26' south latitude, and forms 

 the line of demarkation between Peru and the viceroyalty 

 of Buenos Ayres. In detaching from Peru the four inten- 

 dencies of La Paz, Charcas or La Plata, Potosi, and Cocha- 

 baniba, there have been subjected to a government stationed 

 on the banks of La Plata, not only the provinces where the 

 waters flow towards the south-east, and the vast regions in 

 which arise the Ucayale and the Madeira (tributary streams 

 of the Amazon), but also the inland system of rivers, which, 

 on the summit of the Andes, and in a longitudinal valley, 

 terminated at its two extremities by the clusters of mountains 



* The Partidos of Paucartambo and Tinta, belong to the 

 intendancy of Cuzco. The district of Apolobamba and the 

 basin of the lake of Titicaca, pertain to the ancient viceroy- 

 alty of Buenos Ayres. 



