He got no further. In front of them, where there had appeared to be solid ground, they suddenly saw a yawning pit. Desperately, they tried to veer aside, but they were too close. Their last long birdlike leap carried them over the edge. They fell, far down, into a deep chasm, splashing into a shallow pool of water.

A few clods of earth cascaded after them as the monster above dug its great splay feet into the ground and checked its rush in time to keep from falling after them. Then the top of the pit slowly darkened as a covering of some sort slid across it. They were in a prison as profoundly quiet and utterly black as a tomb.


orn," shouted Joyce. "Are you all right?"

"Yes," came a voice in the near darkness. "And you?"

"I'm still in one piece as far as I can feel." There was a splashing noise. He waded toward it and in a moment his outstretched hand touched the professor's shoulder.

"This is a fine mess," he observed shakily. "We got away from those tooth-lined jaws, all right, but I'm wondering if we're much better off than we would have been if we hadn't escaped."

"I'm wondering the same thing." Wichter's voice was strained. "Did you see the way the top of the pit closed above us? That means we're in a trap. And a most ingenious trap it is, too! The roof of it is camouflaged until it looks exactly like the rest of the trail floor. The water in here is just shallow enough to let large animals break their necks when they fall in and just deep enough to preserve small animals—like ourselves—alive. We're in the hands of some sort of reasoning, intelligent beings, Joyce!"

"In that case," said Joyce with a shudder, "we'd better do our best to get out of here!"