Neither the Mammoth nor Rhinoceros ever entered these dark holes for their own comfort. They cherished a violent dislike for any enclosure suggesting prison walls and therefore, kept in the open country for which—with their weather-proof garments—they were well adapted. But in this particular instance, they made a point of peering into every opening they saw, in order to determine by eye or nostril, what manner of creature was contained therein.

As a rule, the grottoes or shallow caves were occupied by human beings all huddled together, trying to keep warm. The sudden appearance of a mammoth and rhinoceros at the entrances of their dwellings, struck terror in the hearts of the wretched inmates. But the two great beasts were peaceably inclined. Invariably they withdrew as gracefully as possible, after assuring themselves that the one they sought was not among those present. Day after day, week after week, they tramped about through the snow, carefully examining all caves which smelled of smoke—a sign of human occupancy—but none of them harbored their friend, the Ape Boy.

Spring came at last; and still no sign of him. The pair began to feel anxious. They travelled and searched over wide areas of country and meanwhile the slowly rising temperature warned them to begin preparing for a journey to some more congenial climate. “We must soon be departing for the cool country,” said the Mammoth one morning. “It appears as though we would have to leave again without him.”

“We can at least search the valley as we go,” Wulli suggested. “If we fail to find him, we can return and search again before the cool weather sets in.”

So the two cronies proceeded leisurely up the Vézère, examining every nook and cranny as they went. The Cave-men had by this time, abandoned their winter quarters for the rock-shelters and open country. The two animals passed several groups of them but without catching a glimpse of the particular one they sought.

At last the great Rock of Moustier rose before them. They were plodding along its base when the Mammoth came to a sudden halt and glanced above him.

“Here is his old home,” he said. “He may be there now. We can climb up and see.”

The Rhinoceros offered no objections; so the pair ascended to the middle terrace,—not that they expected to find Pic there; but they could take comfort at least in gazing once more upon a spot fraught with so many pleasant associations. Imagine their surprise when as their heads rose to a level with the rock-platform, the first thing they saw was the Ape Boy himself, squatting on the ledge fronting the grotto. He was doing just as he had been doing when the two animals first called upon him—cracking rocks. The ledge was thickly strewn with chips, freshly-broken flakes and lumps of flint. Hairi and Wulli were so overcome by this unexpected sight, they could only stand and stare.

At that moment, Pic glanced up from his work and saw the two heads peeking over the edge of the terrace. His look of sudden surprise changed as quickly to a broad grin which displayed nearly every tooth in his head.

“Where did you two come from?” he asked as the pair clambered up to where he sat. “I have not seen you for a very long time.”