del Monte mining region of Mexico has been an important silver
mining centre for centuries. Here the patio process was allegedly
perfected by Bartolomé de Medina in 1557. In 1824 the Real del Monte
Mining Company was set up in London to work the flooded and abandoned
mines of this region that were in 1849 returned to Mexican ownership by
the British. In 1906 the Mexicans sold the company to the Americans.
Included on this map are the locations of many of the mines and ore
processing mills and the present urban extent of the twin mining
settlements of Pachuca de Soto and Real del Monte.