The annual produce of this mountain at present, is not more than five or 600,000 marcs of silver (each marc being two-thirds of a pound). The richest shafts or workings are in the north-side of the mountain, and are named, La Descubridora, Del Estaño, La Rica, and La Mendieta, their direction running south.
Other causes occasionally conspire to render the vicinity of these mines more populous than the mere riches they contain; as some hot medicinal baths are found here, called Don Diego, to which many people from the neighbouring towns resort; there is also a great concourse of peasants and merchants to the city, to supply it with provisions, &c., with which articles the district around it is totally unprovided.
The district of Tomina begins about eighteen leagues south-east of La Plata, and borders eastward on the Chiriguanos, a nation of independent Indians; it is twenty-four leagues in length from north to south, and seventy in circumference, containing a mountainous country, in the valleys of which there are some sugar plantations, and in its higher parts, it feeds large and small cattle and horses. The climate is in general hot, and in some of the valleys excessively so.
The rivers which water Tomina are small and unite into one stream, named El Dorado, and it is separated from Santa Cruz de la Sierra, by the Rio Grande, which joins the Mamore. There are some small lakes in this province, two of which are in a district, named Mayocaya.
In this province, the inhabitants who are mostly Indians, amount to 12,000, and the town of the same name, is fifty-five miles east of La Plata, in 19° 10' south latitude, and 65° 46' west longitude, but is inconsiderable; the vicinity of the warlike Indians, rendering the province an insecure place of abode.
The town of Porco or Talavera de la Puna, in 19° 40' south latitude, and 67° 56' west longitude, is the capital of the province of Porco, which commences on the west side of the town of Potosi, and extends twenty leagues.
The coldness of its situation, amid the high ridges of the Andes, occasions a scarcity of fruits and grain; but it abounds with fine cattle, and the mountain of Porco in this province is celebrated, as having been the place from whence the Incas of Peru drew the greater part of their silver, and was the first mine worked by the Spaniards after the conquest; the district still producing great quantities of that metal, particularly at Tomahave, and the mines of the Porco mountain, which are twenty-three leagues from Chuquisaca.
The inhabitants amount to 22,000.
Thirty leagues south of La Plata, lies the province of Chichas y Tarija; it is a very fertile territory, and produces wheat, maize, oil, wine and fruits; it also contains excellent pastures, abounds in cattle, and has several gold and silver mines. The river Tipuanis, which flows on its eastern side, carries much gold in its sand, which the natives employ themselves in collecting.
The greatest extent of this province is thirty-five leagues, and the eastern parts are only separated from the independent tribes, by the above mentioned river. Its chief town is San Bernardo de Tarija, which was founded by Don Francisco de Toledo, to repel the incursions of the warlike Indians, and to defend the high road to Tucuman, in 1591. It has four convents and a college, formerly belonging to the Jesuits; in one of its convents, a cross is adored, which it is pretended, was found by the conquerors of Peru in a cave in this country; and that it was made by one of the Apostles, who had preached the Gospel to the Peruvians.