But in spite of its mystery there was a something attractive in the vast cavern, from which it now became evident the little river sprang; for it ran trickling out beneath the rocks we clambered over, till we stood gazing in towards the shadowy depth, listening to strange echoes of a murmuring rising and falling sound that dominated all the faint whispers that escaped, as it were, from time to time to the light of day.

“What do you think of this, Tom?” I said, after vainly trying to see the cavern’s extent.

“Think, Mas’r Harry? Why, it looks to me like the front door to Bogyland. But do let’s get back, sir; for I was never so hungry before in my life. I say stop, Mas’r Harry—what are you a-going to do?”

“Do! Why, go in and explore the place, to be sure, Tom,” I cried, beginning to climb the rocky barrier that barred the way into the cavern.

“No, I say, pray don’t, Mas’r Harry!” cried Tom dolefully. “I ain’t afraid in the light, when you can see what you are doing, but I can’t stand the dark, nohow. Don’t go, Mas’r Harry. Think of what your poor mother would say.”

“Hold your tongue, will you, you great calf!” I exclaimed angrily.

For an intense desire seemed to come over me to explore this dim, shadowy region. For what might we not find there treasured? It might be the ante-chamber to some rich, forgotten mine—one of the natural storehouses from which the old Peruvians had been used to extract their vast treasures. There were riches inexhaustible in the bowels of the earth, I knew, and if this were one of the gates by which they could be reached, held back from causes induced by cowardice I would not be—I had too great a prize to win.

But before I had crossed this natural barrier to the entrance, reason told me that I must have light, and provision, and strength for the undertaking; and at that time I had neither. There was nothing for it then but to listen to the voice of reason, as personified by Tom; and with a sigh I climbed back just as he was going to join me.

I saw plainly enough that it must be nightfall before we could reach home; and, getting free of the rocks, I was musing, and wondering whether, after all, I had hit upon a discovery, when Tom whispered to me, with averted head, to look to the right under the trees.

I did so, and became aware of a shadowy figure slinking off amongst the bushes, but I took little heed of it then, trudging on as fast as the nature of the ground would allow; and at last, thoroughly worn out in body, but with my imagination heated, I reached the hacienda.