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PROMONTORIA AND TIRTE VEINS. 159 
2nd. The southern district, tributary to Alamos. 
There is no district in the State to compare in importance 
with that of Alamos. The two great veins, if they are not 
the same vein, are the Promontoria and the Tirte. 
The Promontoria Mine belongs to the heirs of Almuda, and 
has produced many millions’ worth of silver. Before the late 
war, the owners were in treaty with an English company to 
sell the mine for 150,000 dollars. It was then full of water, 
and could not be thoroughly examined. Since then an 
American company, which bought the Tirte Mine, has, by 
driving a tunnel, completely drained the Promontoria, and I 
have since heard that the English company are again prepared 
to bid for it. The famous old mine, the Deus Padre, is also 
on the same vein, and is being reopened by an American 
company. The vein upon which these mines are situated is 
fourteen yards in thickness, and all metal, yielding an average 
of from sixty to eighty dollars to the ton. The ore is black 
sulphuret of silver. Eighteen leagues from Alamos is situated 
the famous mine of Don Miguel Urrea—the Palmarejo. 
This mine, by the Mexican process alone, can still produce 
30,000 dollars per month, whilst one thousand ‘ barreteros” 
can work at one time in the passages of its “labores.” <A 
mine bought for 150,000 dollars by the English company 
which is in treaty for the Promontoria, and situated at 
Uruachi, is yielding large quantities of silver, and quite 
equals the expectations of the owners. A new silver mine 
has recently been discovered near Soyopa, on the Rio Yaqui, 
the ores of which are abundant, and yield by the simplest 
Mexican process of amalgamation, without need of roasting, 
from 400 to 800 dollars per ton. 
Alamos also receives silver from Batopilas (in which district 
there are no less than six hundred distinct veins), Jesu Maria, 
