The Mexicans crossed the rocks without difficulty, and soon found themselves before the dark and frowning entrance of the cavern. The chief gave his peons a signal to halt.
"It would not be prudent," he said, "to venture without precautions into this cavern. Prepare your arms, muchachos, and keep your eyes open; at the slightest suspicious sound, or the smallest object that appears, fire. Capataz, light the torches."
The latter obeyed without a word; the leader of the caravan assured himself at a glance that his orders had been properly carried out; then taking his pistols from his belt, he cocked them, took one in each hand, and said to Carnero--
"Take the lead," he said, with a mocking accent; "it is only just that you should do the honours of this place which you so unexpectedly discovered. Forward, you others, and be on your guard," he added, turning to the peons.
The eight men then went into the cavern at the heels of the capataz, who raised the torches above his head, doubtless in order to cast a greater light on surrounding objects.
This cavern, like most of those found in these regions, seemed to have been formed through some subterranean convulsion. The walls were lofty, dry, and covered at various spots with an enormous quantity of night birds, which, blinded and startled by the light of the torches, took to flight with hoarse cries, and flew heavily in circles round the Mexicans. The latter drove them back with some difficulty by waving their muskets. But the further they got into the interior of the cavern, the greater the number of these birds became, and seriously encumbered the visitors by flapping them with their long wings, and deafening them with their discordant cries.
They thus reached a rather large hall, into which several passages opened. Although the Mexicans were a considerable distance from the entrance, they found no difficulty in breathing, owing doubtless to imperceptible fissures in the rock, through which the air was received.
"Let us halt here for a moment," the leader said, taking a torch from the capataz; "this hall, if the cavern has several issues as I suppose, will afford us a certain refuge: let us examine the spot where we are."
While speaking he walked round the hall, and convinced himself, by certain still existing traces of man's handiwork, that at a former period the cave had been inhabited. The peons seated themselves idly on the blocks of granite scattered here and there, and with their guns between their legs carelessly followed their master's movements.