"Yes, I want to help you," said Maget. "If you'll keep me with you, I'll work for you and be straight. Give me a chance." "Good. Then shake hands on it," said Kenneth, and they clasped hands firmly. Espinosa appeared from the darkness. "The peons are mad with terror," he said morosely. "They cannot be held much longer. They will revolt." "Well, we must kill the creatures in the cavern: that will quiet them more than anything else," said Professor Gurlone. "Better close the stone shack," said Kenneth. But as he spoke, a vast shape, another giant frog, appeared in the entrance of the shaft. "Get some dynamite and fuses," ordered Professor Gurlone quietly. "Come on Kenneth, and you, Maget, if you care to risk your life. You need not do so unless you wish to." Bravely, the older man led the way towards the croaking monster. The ground shook at its approach. It was heading for the bodies of the dead frog and polywog, bent on a search for food. Evidently these vast creatures were forced to prey upon one another for sustenance. * * * * * The rifles spoke, and Maget and the professor, in their black suits, protected by the lead-cloth and helmets from the rays, advanced. They poured bullet after bullet into the frog. Kenneth came running to join them, and Espinosa stood by. Kenneth had dynamite bombs with fuses ready for lighting and throwing. He also brought more ammunition, and the three armed themselves to the teeth. It was well after midnight when they started into the mine. They knew they must act quickly or retreat, for the bellowing sounded nearer and nearer the surface of the earth. Each man carried big, powerful flashlights, and the three entered the mine shaft and walked across the seething slugs into the bowels of the earth. "Stay close together," ordered old Gurlone. The mine was easy to descend for the first hundred yards. It led in a gentle slope downward. The way, save for a few giant bats and moths, and the big maggots, was clear. The greenish haze, not so bright as that in the death shack, enveloped them, but they needed their flashes to see clearly. "Slowly, take it easy," counseled old Gurlone. The mine spread out now, and began a steeper descent. The air was poor, and it was hard to breathe through the mask. Maget, his heart thumping mightily, listened to the roaring within the depths of the mine. Now the ground seemed to drop away before them. Maget could hear the running of water, the underground river, and every now and then there came an immense splash, as if some great whale had thrown itself about in the water. A terrifically loud hissing filled their ears, and suddenly, before them, showed an utterly white snake with a head as big as a barrel. Its white eyes glared sightlessly, but its tongue stuck forth for several feet. Kenneth Gurlone coolly tossed a lighted bomb at the creature: the explosion shattered their ear-drums, but it also smashed the serpent.