toward the tree trunk. Certainly no sound they made could have reached
the ear of the monster wallowing below the bank, but the wind carried to
its nostrils the message of their coming. They were not half way across
the valley when the rhinoceros floundered up to the level and charged
wildly along the course of the wafted scent. There was a flight for the
hillside, made none too soon, but yet in time for safety. Walking around
in circles, snorting viciously, the great beast lingered in the vicinity
for a time, then went back to its imprisoned calf, where it repeated the
performance of earlier in the day and finally retired again to its hidden
resting-place near by. It was dusk now and the shadows were deepening
about the valley.

The men, well up in the tree with the boys, were undetermined what to do.
They might steal along to the eastward and approach the calf from another
direction without disturbing the great brute by their scent. But it was
becoming darker every moment and the region was a dangerous one. In the
valley and away from the trees they were at a disadvantage and at night
there were fearful things abroad. Still, they decided to take the risk,
and the four, following the crest of the slight hill, moved along its
circle southeastward toward the river bank, each on the alert and each
with watchful eyes scanning the forest depths to the left or the valley
to the right. Suddenly One-Ear leaped back into the shadow, waved his
hand to check the advance of those behind him, then pointed silently
across the valley and toward the clump of trees.

Not a hundred yards from the pitfall the high grass was swaying gently;
some creature was passing along toward the pitfall and a thing of no
slight size. Every eye of the quartet was strained now to learn what
might be the interloper upon the scene. It was nearly dark, but the eyes
of the cave men, almost nocturnal in their adaptation as they were,