_If you can find a piece of flint strike off a flake with a hammer-stone. Strike off a flake with an angular stone. Strike off a flake by using a hammer and punch._ _Sort out the flakes that are good for knives. Put handles on them. Sort out the flakes that are good for making into spearheads. See if you can strike off tiny flakes until the large flake looks like a spearhead._ _Find something which you can use as a flaker. When you have made one, see if you can use it._ _Make a collection of stones which you can chip or flake. Tell all you know about each of those stones._ _Think of Scarface as he was telling the story. Draw the picture._ VII THINGS TO THINK ABOUT What do our horses and cattle eat? Where do we get their food? What do wild cattle and horses eat? See if you can find out whether wild cattle or horses have ever lived in a place where the ground is covered with snow part of the year. Did you ever see cattle pawing the ground? Did you ever see horses pawing the ground? Did you ever see them paw the snow? See if you can find out something about the great herds of bison that used to live in this country. What has become of them? Can you think why bison live in herds? What officers does a herd of bison have? Can you think how the officers of a herd of bison are chosen? _The Return of the Bison_ Ever since the reindeer went away the Cave-men had been looking for the return of the bison. Each summer the herds came up the valley to feed on green grass and tender shoots. Each winter they went to the forests of the lowlands where they found shelter from the cold. The snow was now gone from the wooded hills and the days were warm again. The dingy brown coats of the hillsides were changing to the palest green. The buds were beginning to swell. Everything seemed to say that summer was coming. Each day the Cave-men watched for signs of the coming of the great herd. Each night they danced the bison dance and tried to make the bison come. One morning Straightshaft climbed the cliff and looked far up and down the valley. Looking north he could see the River of Stones with high cliffs on one or both banks. He could see dense forests of evergreen that grew on the low banks. He could see hills and valleys beyond the cliffs where many wild animals lived. Looking south, near at hand, was the Fork of the River where Little River joined the River of Stones. Here the cliffs were not very high; farther down, they became lower, and at last there were no cliffs. The edge of the lowland forest where the bison wintered could be seen far away. Grassy lowlands near the forests stretched farther than the eye could see. It was here that the bison and cattle found the best winter pastures. It was in the lowland forests that they found shelter from the cold.