as his own fault. He was a thief and
he would not let us stop him. I hope it's been a lesson to you,
Maget."

"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
thumpin