against the rocks; there was a thud which sent a tremor through the whole craft, and then a moment of nasty grinding as the steel hull scraped the rock wall. I expected momentarily the inrush of waters that would seal our doom; but presently from below came the welcome word that all was well. In another fifty yards there was a second turn, this time toward the left! but it was more of a gentle curve, and we took it without trouble. After that it was plain sailing, though as far as I could know, there might be most anything ahead of us, and my nerves strained to the snapping-point every instant. After the second turn the channel ran comparatively straight for between one hundred and fifty and two hundred yards. The waters grew suddenly lighter, and my spirits rose accordingly. I shouted down to those below that I saw daylight ahead, and a great shout of thanksgiving reverberated through the ship. A moment later we emerged into sunlit water, and immediately I raised the periscope and looked about me upon the strangest landscape I had ever seen. We were in the middle of a broad and now sluggish river the banks of which were lined by giant, arboraceous ferns, raising their mighty fronds fifty, one hundred, two hundred feet into the quiet air. Close by us something rose to the surface of the river and dashed at the periscope. I had a vision of wide, distended jaws, and then all was blotted out. A shiver ran down into the tower as the thing closed upon the periscope. A moment later it was gone, and I could see again. Above the trees there soared into my vision a huge thing on batlike wings—a creature large as a large whale, but fashioned more after the order of a lizard. Then again something charged the periscope and blotted out the mirror. I will confess that I was almost gasping for breath as I gave the commands to emerge. Into what sort of strange land had fate guided us?