A low
growl escaped him and his upper lip curved to expose his fighting
fangs. "Numa!" he muttered; but he did not stop. Numa might not be
at home--he would investigate. The entrance was so low that the
ape-man was compelled to drop to all fours before he could poke
his head within the aperture; but first he looked, listened, and
sniffed in each direction at his rear--he would not be taken by
surprise from that quarter.
His first glance within the cave revealed a narrow tunnel with
daylight at its farther end. The interior of the tunnel was not so
dark but that the ape-man could readily see that it was untenanted
at present. Advancing cautiously he crawled toward the opposite
end imbued with a full realization of what it would mean if Numa
should suddenly enter the tunnel in front of him; but Numa did not
appear and the ape-man emerged at length into the open and stood
erect, finding himself in a rocky cleft whose precipitous walls
rose almost sheer on every hand, the tunnel from the gorge passing
through the cliff and forming a passageway from the outer world
into a large pocket or gulch entirely enclosed by steep walls of
rock. Except for the small passageway from the gorge, there was no
other entrance to the gulch which was some hundred feet in length
and about fifty in width and appeared to have been worn from the
rocky cliff by the falling of water during long ages.
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