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 

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