172 



Western district, or the country 

 between Pilcomayo, Paraguay, 

 the Rio de la Plata, the Rio 

 Negro, and the Cordillera of 

 the Andes (Tarija, Jujuy, Sal- 

 ta, Tucuman, Cordova, Santa* 

 Fe, Buenos Ayres, San Luis de 



la Punta and Mendoza) 66,518 sq. marine leagues 



Eastern district, that is, all on the 

 east of the Rio Paraguay and 

 the Parana 23,232 



126,770 



The government of Buenos Ayres might partly find a 

 compensation for the losses with which it is menaced on the 

 north-east, by clearing a territory of 5054 square leagues, 

 situated between the Rio Colorado and the Rio Negro. 

 The Patagonian plains as far as the Straits of Magellan, pre- 

 sent more than 31,206 square leagues, of which nearly two 

 thirds are in a much more temperate climate than is general- 

 ly supposed. 



In that part of the viceroy atty occupied by the Brazilians 

 on the east of the Uruguay, we must distinguish* between the 

 limits recognized before the occupation of the Province of the 

 Missions, on the north of the Rio Ibicuy, in 1801, and the 

 boundaries established by the treaty concluded in 1821, be - 

 tween the Cabildo de Montevideo and the Captain-generalship 

 of Rio Grande. The Province of the Missions is contained be- 

 tween the left bank of the Uruguay, the Ibicuy, the Toropi, 

 a tributary stream of the latter, the Sierra de Saint Xavier, 

 and the Rio Juy (a tributary stream of the Uruguay). Its 



* These statements are founded on the manuscript notes 

 which Mr. Auguste de Saint-Hilairc collected on the spot. 



