But Flaker had made a saw. It was only the rough edge of a flint flake. No doubt such rough edges had been made many times before. But Flaker learned to use the rough edge by pushing and pulling it back and forth. [Illustration: _A Cave-man's dagger of carved antler._] When Flaker sawed the prongs from the beam, some of the places were rough. So he rubbed them with the face of the flint until he made them smooth. When Flaker did this, the flake, which had been only a knife, became a file as well as a saw. Greybeard and Chipper tried the new daggers and found that they were sharp and strong. And the next time they went on the chase they took the new weapons along. Bighorn saw the new weapons, but he said little about them. For Bighorn knew better than to make fun of weapons Greybeard used. Nothing pleased Flaker more than to be able to help Greybeard. And so he cherished the new tool that he used in shaping reindeer horn. Sometimes he showed it to Greybeard, who was always kind to the boys. But even the wise old man had no idea of what a wonderful tool it was. The other Cave-men saw the tool, but they thought very little about it. They cared a great deal about the weapons they used in the chase. But few of the Cave-men ever thought of making anything they did not need right away. And so little was said about the new tool which was a knife with two blades, a saw, and a file, all in one. Nobody dreamed at that time that the little tool was the forerunner of a great change. #THINGS TO DO# _If you can strike off a large flint flake with three faces, see if you can make it into a knife-saw-file._ _Look at the picture, or at the real tool you have made, and find the plain face that can be used as a file._ _Find the two edges which can be used as knives. Find the edge which has a crest of teeth, and which can be used as a saw._ _Draw one of these pictures:_-- _The women chopping prongs from the beam of the antler._ _Flaker sawing the prongs off the antler._ XXIX THINGS TO THINK ABOUT Can you think why the females and the young males of the reindeer herd could drive the old stags away during the winter? Could they do it in the summer? Why can the reindeer walk easily in the snow or on slippery places? What is it that makes the clicking sound when reindeer walk or run? Why were the Cave-men careful to make no mistake in the dance? _The Reindeer Dance_ Fleetfoot did not hunt with the men, but he learned many things from them. In early winter, he heard them tell stories of dangerous encounters with ugly stags. When the old stags shed their antlers, he saw the men dance the reindeer dance. Fleetfoot mimicked the reindeer's movements and the grunting sounds they made. But he was not allowed to join with the men in dancing the reindeer dance. Only brave men were allowed to join in the dance. Only the bravest men were allowed to lead.