After half an hour of going back and forth over the same ground and following a rocky ascent upward toward the summit of the cliff a dozen times, as though proving and re-proving the correctness of his deductions, Nu at last set forth across the Barren Cliffs and down onto the beach beside the Restless Sea.
Here he found the spoor more plainly marked in many places above high tide where Nat-ul's little sandals had left their legible record in the soft loam or upon the higher sand that the water had not reached. The way led southward, and southward hurried Nu, the son of Nu. Straight to the old dwellings led the trail. There Nu found evidence that Nat-ul had spent the night in a cave above the one in which he had slept. There was the bed of grasses and a trace of the delicate aroma that our blunted sense of smell could never have detected, but which was plain to Nu, and deliciously familiar.
A pang of regret seized him as he realized that his Nat-ul had been so close to him, and that he had unwittingly permitted her to remain alone and unprotected amidst the countless dangers of their savage world, and to go forth, none knew where, into other myriad dangers.
Returning to the foot of the cliff he once more came upon the girl's spoor. Again it led south along the beach. Swiftly he followed it until it stopped behind a little clump of bushes at the top of a rise in the ground. Before Nu realized that this was the southern limit of the trail he had seen the village beyond and the people engaged in what to him seemed a strange occupation. He knew that the same sight had brought Nat-ul to a halt a few hours before, and now he saw where she had lain upon her belly watching, just as he was watching. For a few minutes he lay watching the workers and seeking through the little cluster of skin and thatch shelters for some sign that Nat-ul was a prisoner there.
Nu had never seen a boat or guessed that such a thing might be. His people had been hunters from time immemorial. They had come down from the great plateaus far inland but a few generations since. Then, for the first time, had his forefathers seen the ocean. As yet they had not met with any need that required them to navigate its waters, nor had they come in contact with the Boat Builders who dwelt far south at the mouth of a great river that emptied into the Restless Sea.
Now, for the first time, Nu saw both the boats and the Boat Builders. For the first time he saw artificial shelters, and to Nu they seemed frail and uncomfortable things by comparison with his eternal caves. The Boat Builders had been several days in this new camp. What had driven them so far north of their ancestral home, who may guess? A tribal feud, perhaps; or the birth of a new force that was to drive them and their progeny across the face of the world in restless wanderings to the end of time—the primitive wanderlust from which so many of us suffer, and yet would not forego.
Nu saw that of all the workers one tall young giant labored most rapidly. His haste seemed almost verging upon frenzy. Nu wondered what he could be about upon the felled tree trunk that required so much exertion. Nu did not like work of that nature. It is true that he had never done any manual labor outside the needs of the chase, but intuitively he knew that he disliked it. He was a hunter, a warrior, and even then, in his primitive and untutored mind, there arose a species of contempt for the drudge. At last, tiring of watching, he turned his attention again to the spoor he had been following. Where had Nat-ul gone after lying here behind these bushes?
Nu crawled about until he saw evidences of the girl's quick leap to her feet and her rapid flight. Then it was he came upon the footprints of Tur. Now Nu's blood ran hot. It surged through his heart and pounded against his temples—Nat-ul, his Nat-ul, was in danger!
He saw where the girl had dodged past the man. He saw, distinctly in the sand, the marks of Tur's quickly turning footsteps as he wheeled in pursuit. He saw that the two had been running rapidly along the beach toward the north—the man following the girl, and then, to his surprise, he saw that the man had come to a sudden stop, had taken a few steps forward, stood for some time looking seaward and then turned and raced back toward the strange camp at breakneck speed.
And the girl's trail had continued toward the north for perhaps a hundred paces beyond the point at which the man had halted. Nu followed it easily—they were fresh signs since the last high tide, alone and uncrossed upon a wide stretch of smooth, white sand.