“I want you to swear—”

“Then I ain’t a-going to swear, nor nothing of the kind; so you need not think it. If I ain’t worth trusting send me back; leastwise, you won’t do that, because I sha’n’t go. But, howsoever, I ain’t a-going to go swearing and taking oaths, and, there! be quiet! Look there, Mas’r Harry. Make him swear if you like. No, not that way, more off to the left. Turn your eye just past them three big trees by the lump of rock. That ain’t a deer this time, but some one on the look-out. Two on ’em, that there are!”

I glanced in the pointed-out direction, to see plainly that a couple of Indian heads were strained towards us, as if their owners were narrowly watching for our appearance; though I knew from the gloom beneath the arch where Tom was seated that we must be invisible to any one standing out there in the glow of the bright afternoon sunshine.

What did it mean? Were these emissaries of Garcia watching my every act; or were they descendants of the Peruvian priests possessed of the secret of the buried treasures.

I shrank back farther into the cavern to crouch down, Tom imitating my acts, and together we watched the watchers, who remained so motionless that at times I felt disposed to ask myself whether I had not been mistaken, and whether these were not a portion of one of the rocks.

“It’s no good, Mas’r Harry,” said Tom; “we must make a rush for it. They’ll stop there for a week, or till we go. ’Tain’t nothing new; there’s always some one after you; and if you’ve found anything I can’t see how you’re going to get it away. Let’s go now, before it gets evening, for they’ll never move till we do.”

“But the—”

“Well, they ain’t obliged to know that we’ve found that, Mas’r Harry,” said Tom smiling. “We don’t know it ourselves yet. What we’ve got to do is to play bold, shoot one or two of the birds as they dodge about farther in, then knock off a few of those pretty bits of white stone hanging from the roof, and they’ll think that we’ve come after curiosities.”

Tom’s advice was so sound that I led the way farther into the cave, where we made the place echo, as if about to fall upon our heads, as we had a couple of shots, each bringing down six of the guacharo birds. Then re-loading, we secured three handsome long stalactites, white and glittering, and thus burdened we took our departure, walking carelessly and laughing and examining our birds, Tom stopping coolly to light his pipe just as we were abreast of where we had seen the Indians.

It was bold if the watchers’ intentions were inimical, and we gave ourselves the credit of having thrown them off the scent, for we saw no more of them that evening; returning tired and excited to the hacienda to find my uncle quiet and cordial, for he seemed to be giving me the credit of trying to break myself off my inclination.