Fleetfoot did this just in time to save Flaker's life. He struck at the Bison's head, then dodged in time to escape his horns. He dodged again and again until he was almost exhausted. The bison limped, but he seemed as strong and as furious as ever. Once again the bison charged, and again Fleetfoot dodged. Then a spear whizzed past Fleetfoot's head and a voice called, "Climb a tree." [Illustration: "_They looked so much like wolves that they got very close before the bison threatened._"] Fleetfoot never remembered running to the tree. He never remembered climbing it. But for many days he seemed to see himself in the tree and the bison just beneath. For many days he seemed to hear Greybeard's welcome voice. [Illustration: _A Cave-man's carving of a "hamstrung" animal._] Greybeard and Fleetfoot stayed in the trees until the bison started up the ravine. Then they climbed down from one of the trees and hurried to see what had happened to Flaker. #THINGS TO DO# _Tell something that you have learned from watching an animal._ _Mention as many things as you can that you think the Cave-men learned from animals._ _Straighten and bend your elbow or knee so as to find where the strong muscles are._ _Tell why the Cave-men tried to cut the strong muscles of the bison's knee. We say when we cut these large muscles that we have "hamstrung" the animal._ _Look at the picture of a Cave-man's carving of an animal which has been "hamstrung." Can you tell what animal it is?_ _Think of the two wolves coming up toward the bison. Model one of them in clay. See if the children can guess which one it is._ XXVI THINGS TO THINK ABOUT What do you think had happened to Flaker? If any of his bones were broken, do you think the Cave-men could set them? Do you think there were doctors when the Cave-men lived? Who would do the work which doctors do to-day? _What the Cave-men did for Flaker_ Fleetfoot ran ahead of Greybeard and found Flaker on the ground. Fleetfoot stooped and looked into his face. He called him by name. No answer came. Then Fleetfoot asked Greybeard if Flaker was dead. Greybeard shook his head as he bent down and laid his hands upon the boy. He examined his wounds, then said to Fleetfoot, "Let's carry him down to the cool spring." So Greybeard and Fleetfoot lifted Flaker and carried him gently down to the spring. There they bathed his face and the ugly wounds with fresh cool water. They bound his wounds with strips of the skins that the boys wore that day. When Greybeard tried to set the broken bones, Flaker began to moan. He opened his eyes for a moment; then he fell back in a swoon. Then Greybeard sent Fleetfoot to the cave for help. And Fleetfoot hurried and told Antler; and Antler, picking up some little things which she knew she would need, and telling the women to follow quickly with a large skin, went with Fleetfoot to the spot where Flaker lay.