CHAPTER XXXI.. Visit to Pachuca and Real Del Monte.--Otumba and Tulanzingo.--the

Visit to Pachuca and Real del Monte.--Otumba and Tulanzingo.--The grand Canal of Huehuetoca.--The Silver Mines of Pachuca.--Hakal Silver Mines.--Real del Monte Mines.--The Anglo-Mexican Mining Fever.--My Equipment to descend a Mine.--The great Steam-pump.--Descending the great Shaft.--Galleries and Veins of Ore.--Among the Miners one thousand Feet under Ground.--The Barrel Process of refining Silver.--Another refining Establishment 352