As the sun rose above the horizon, Anak and Invar took their way up the valley. Each carried three flint-tipped throwing-spears, while a good supply of flint throwing-stones were in their skin pouches. Half a mile from camp, Anak turned to his companion. "I thank you for coming with me," he said, his hand on Invar's shoulder. "It is the deed of a brave man." Invar flushed and looked down. "The least that I can do is to go to Degar Astok with my friend," he said. "It is the deed of a brave man, yet I think we are not yet ripe to die." "We go against the cousins of Gumor, do we not?" asked the lad. "We do." "And is that not death?" "Mayhap, and yet, I have a plan. We may live." "How can we two expect to do what all the tribe of Ugar dare not try?" "The tribe of Ugar, or a dozen tribes of Ugar, could not conquer with Uglik leading them," replied Anak, "yet we two may do so. Hark now to my plan. Like Gumor, the gray ape, his cousins walk ever with their eyes cast down. While we have been hunting, I have been spying on them in their home. Never have I seen one look up, and it may be that they cannot. Above or on a level with us, they can easily kill us. If we stand on the rocks above them, they cannot see us and will be at our mercy. They can run as fast as we on level ground, but going uphill, we will leave them as Guno, the deer, leaves Kena. They are few in number; I have watched and seen but two hunters and three females. It is my plan to scale the cliffs and watch them below us. When the time is ripe, we will launch our throwing-spears. If we fail to make a kill, we will bound up the hill and escape to strike again." Invar looked with admiration at his leader. The habit of connected thought and reasoning was new in the world in those days. Such boldness of conception as was shown by Anak's plan was a thing for marvel. As the ramifications of the plan seeped into Invar's brain, his face glowed with enthusiasm. "Anak should be Father of the tribe of Ugar!" he cried. "That may yet come to pass," replied Anak enigmatically. "If I kill Uglik, however, it will be to avenge Una, not to win the chieftainship. Now keep silence, for here is the home of the cousins of Gumor." * * * * * Cautiously the two hunters passed the mouth of the ravine and climbed the slopes of the valley. Once on the level ground, they moved to the edge of the ravine and looked down into it. Nothing could be seen moving. Anak led the way a hundred yards farther up the ravine. "Below us is a cave where dwell two," he whispered. "Make ready your spear while I sound the challenge."