ng cries of the apemen. They had
returned to the cavern only to be overcome by smoke fumes. While yet
the earth people stood there waiting and watching the red death creep
nearer, the path leading downward into the jungle became a mass of
moving shadows.

"The dinosaurs!" cried Nanette. "Oh, Aaron! We are lost!"

"Steady, girl," soothed the man. "If we stand still they might not see
us in the dark. The smoke will destroy our scent."

But as the minutes passed the herd of monsters increased. They crowded
along the path and spread out over the top of the plateau. Once again
the smell of their glistening bodies fouled the nostrils of the earth
people.

Slowly Carruthers guided Nanette back towards the ring of
rocks--perhaps the barrier would serve to keep the animals away. He
scrambled across one of the boulders and pulled the girl after him. As
he did so, a violent subterranean action shock the electron from one
end to the other.

* * * * *

Carruthers braced his feet against the ring of rocks to keep from
pitching headlong to the ground. Nanette clung to him wordlessly. All
around them the giant forces of nature raged sullenly. Twisting seams
appeared in the rocky floor of the plateau from which oozed gaseous
vapors.

"Courage," soothed Carruthers as he held the quivering body of the
frightened girl close to his own. "This can't last."

But the ground continued to lurch and heave on its axis. Vivid lights
crossed and criss-crossed the atomic heavens. The fissures in the
ground appeared now as black canals. The lower part of the circle of
boulders disappeared. Off to the right came despairing screams. White
bodies glowed for an instant against the background of flames.

"Zark!" shouted Carruthers, as he saw the leader of the tribe of Esau
and his followers making their way along the plateau top.

Zark must have heard the earth-man's voice, for he started forward at
a run. Simultaneously there appeared a herd of the greatest of all the
prehistoric monsters--the Brontosaurus. They balked enormously against
the flame-licked skies. Zark and his followers attempted to avoid
them. But fear of the scorching flames drove the monsters forward.
There followed a maddening moment of unutterable pain for the
remaining ones of the tribe of Esau, then the herd trampled them
underfoot and rumbled towards the half circle of rocks where the two
earth people were crouched.

The leader of the Bro