And so here began a discussion, and if each, including Carlos, had had his way, all four would have gone that route. But at last we came to a decision, and Robert and I won, I to go first.

I selected a stone of sufficient weight to hold me down, so that I should not scrape on the roof of that passage; and I let them set the loop of rope about me, under the arms. I waded into the pool. I felt the suck of the water on my legs when I neared that hole.

"Keep your nerve and trust us," said Norris.

"Let her go!" I cried, and took a breath and held it, and ducked my head.

The current caught me. I experienced but a momentary pang of fear; and then succeeded a pleasurable sense of excitement. The next moment my feet touched something more yielding than rock, and that was the signal to lift my head to the surface. I was in the cavern. I slipped out of the noose, and gave the signal to haul away, and the rope went out of my hand. I crawled out of the stream.

It seemed little more than a minute, and Robert was beside me. I heard him gasping for his first breath.

"Who'd have thought it would be so easy," he said.

We took in the rope and hurried out to our old camp in the brush. We knew well where to lay our hands on the rifles—Marat's and Robert's and mine. There were some hundreds of rounds of cartridges for the larger guns—Marat's and Norris's—and many more of the twenty-two calibre for our little rifles.

We tarried not at all, but got back through the cascade into the cavern again, and so up and out, on the way to that cliff-top.

We moved cautiously, as we neared those cedars, where hung the rope ladder, for it was probable there should be a peril there, in the shape of a black, guarding the ladder, and it was in reason that he should have some kind of weapon. Our plan of action had been determined before we left Norris. We would surprise the fellow, pounce on him and secure him with the rope.