It was free gold, six or seven ounces of it, almost pure, and for the most part in small nuggets, that once were contained in a bag which had long since rotted away.

Doubtless, after the mine was closed, some Aztec, who knew its secret, had made a practice of working there for his own benefit, till one day, as he was coming out, the rock fell upon him and crushed him, leaving his spirit to haunt the place for ever.

“There is no doubt about this mine being rich,” whispered the señor; “but all the same I think that we had better get out of it. I hear odd noises and rumblings which frighten me. Come, Ignatio,” and he turned to lead the way towards the opening.

Two paces farther I saw him strike his ankle against a piece of rock that stood up some six or eight inches from the floor-bed of the tunnel, and the pain of the blow was so sharp that, forgetting where he was, he called out loudly. The next instant there was a curious sound above me as of something being torn, and, lo! I lay upon my face on the rock, and upon me rested a huge mass of stone.

I say that it rested upon me, but this is not altogether true, for, had it been so, that stone would have killed me at once, as a beetle is killed beneath the foot of a man, instead of taking more than two-and-twenty years to do it. The greater part of its weight was borne by the piece of rock against which the señor had struck his leg, a point of the fallen boulder only pressing into my back and grinding me against the ground. Now we were in darkness, for the señor had been knocked down also, and his candle extinguished, and, in the midst of my tortures, it came into my mind that he must be dead.

Presently, however, I heard his voice, saying, “Ignatio; do you live, Ignatio?”

Now I thought for a moment. Even in my pain I remembered that more of the roof would surely give ere long, and that if my friend stayed here he must die with me. Nothing could save me, I was doomed to a slow death beneath the stone; and yet if I told him this I knew that he would not go. Therefore I answered as strongly as I could:

“Fly, señor, I am safe, and do but stay to light a candle. I will follow you.”

“You are lying to me,” he answered; “your voice comes from the level of the floor.” And as he spoke I heard the scratching sound of a match.

So soon as he had found his candle and lit it, he knelt down and looked at me. Then he examined the roof above, and, following his glance with difficulty, I saw that next to the hole whence the boulder had fallen, hung a huge block of stone, that, surrounded by great cracks from which water dropped, trembled like a leaf whenever he moved or spoke.