171 



be so useful for the exportation of the productions of the 

 Sierra,, or of Upper Peru. On the west, the western chain 

 of the Andes, as far as 37° of latitude ; and on the south the 

 Rio Colorado, called also Desaguadero de Mendoza (lat. 

 39° 56'), or, according to the most recent authorities, the 

 Rio Negro, separate Buenos Ayres from Chili and the Pata- 

 gonian coast: 



As Paraguay, the province Entre Rios, and Banda Oriental 

 or the Cisplatine Province * may possibly remain separated 

 from the state of Buenos Ayres, I have thought it right 

 to calculate separately the contents of these countries 

 in dispute. I have found in the limits of the ancient 

 viceroyalty, between the Sea and the Rio Uruguay, 8960 

 square marine leagues ; between the Uruguay and the Pa- 

 rana (Provincia entre Rios) 6848 square leagues - t and 

 between the Parana and the Rio Paraguay (the province 

 of Paraguay properly so called) 7424 square leagues. 

 These three parts on the east of the Rio Paraguay, from 

 New Coimbra as far as Corrientes, and on the east of 

 the Rio Parana, from Corrientes as far as Buenos Ayres, form 

 a space of 23,232 square leagues + , nearly half as large again 

 as France. I find consequently, for the three parts of which 

 the ancient viceroyalty of Buenos Ayres is composed, in- 

 cluding 18,300 square leagues of pampas, or savannahs : 



Northern district, or Upper Peru, 

 from Tequieri and Mamore, as 

 far as Pilcomayo, between 13 



and 21 degrees of south lat 37,020 sq. marine leagues 



* The extent of territory comprised between the sea, the 

 Rio de la Plata, the Uruguay, the Missions, and the Brazil- 

 ian captaincy of Bio Grande. (Auguste de Saint-Hilaire, 

 Apercu, d'un voyage dans Vinterieur du Bresil, 1823, p. 1.) 



+ Nearly 36,300 square leagues, 25 to a degree, and not 

 50,263 of these leagues, as the journals of Buenos Ayres 

 assert. 



