During the few days we spent in the Real district, I find in my notebook mention of three fires which we saw.

We spent the next day in resting, and in visiting the mine-works near at hand.

The day after, an Englishman who had lived many years at the Real offered to take us out for a day's ride; and the Company's Administrador lent us two of his own horses, for the poor beasts from Pachuca could hardly have gone so far.

The first place we visited was Penas Cargadas, the "loaded rocks." Riding through a thick wood of oaks and pines, we came suddenly in view of several sugar-loaf peaks, some three hundred feet high, tapering almost to a point at the top, and each one crowned with a mass of rocks which seem to have been balanced in unstable equilibrium on its point,--looking as though the first puff of wind would bring them down.

The pillars were of porphyritic conglomerate, which had been disintegrated and worn away by wind and rain; while the great masses resting on them, probably of solid porphyry, had been less affected by these influences.