I must confess that I was utterly downcast over my mishap, and if there had been any dry ground handy I would have thrown myself down upon it in abject despair. But there was only water around, and, disconsolate as I was, I felt I must either go forward or backward.

How I became turned about I do not know, but certain it is that, in essaying to return to the spot from whence I had come, I continued on down the stream. I did not notice the mistake I had made until fifty yards had been passed and I brought up against an overhanging rock with my shoulder. Putting up my hands, I was dismayed to discover that the passage-way was just high enough to clear my head.

Realizing that I must be walking into a trap, I endeavored to turn about, when I slipped and went down again. Before I could gain my footing I was swept around a bend and into a much broader stream. All was as dark as before, and I soon learned that the bottom of the new water-course was beyond my reach. Putting my hand up, I learned that the rocky ceiling was not over two feet above the surface of the water, and the distance between the two was gradually but surely growing less!


[CHAPTER XX.]

SEÑOR GUEREZ.

I was horrified over the discovery that I had made. Here I was, in absolute darkness, hemmed in by water and rocky walls, and drifting rapidly I knew not whither.

In my terror I cried aloud, but only echo answered me—a peculiar echo which made me shiver from head to foot.

On and on, and still on, was I dashed by the underground current, which seemed to grow more powerful as I advanced, until my head grazed repeatedly against the wall over me, and I felt like giving myself up for lost. Oh, how bitterly I regretted the curiosity which had led me to explore the cavern in which chance had so strangely placed me!