A drum.
At the first sound of the weird music, the reindeer pricked up their ears. Then the larger reindeer that had lost their antlers started off to make-believe higher lands. There they made believe paw the snow until they found the moss. As the music of the storm grew louder, the herd followed to the higher lands. And with many an angry threat they drove the old stags away.
Then the drumming and humming became fainter, and at last the sounds died away. But still the faint clicking of the rattles marked each step of the men in the dance.
Another signal from Bighorn marked the change to a new scene. Trails were marked upon the ground and sticks placed for hills and streams.
While the reindeer pretended to feed, a group of Cave-men appeared. Bighorn, who was still the leader, sent Little-bear to watch where the trail crossed the hills. Chipper was sent to lie in wait at the spot where the trail crossed the river. And Bighorn, himself, took his stand at the point where the trails crossed.
When the men took their places, others crept back of the herd. Only the light music of the rattles sounded as the reindeer moved about.
As the men came nearer the reindeer herd, the sentinels showed signs of fear. The clicking of the rattles was quicker. The herd became thoroughly alarmed and the women shook the rattles and made a loud din.
Then the reindeer started on their old trails and came near the spots where the men were hid. The clicking of the rattles marked the time for the running, and the beating of the drum showed when javelins were hurled. Soon the shouts of the men and the rattles and drums made a loud noise.
All the Cave-men enjoyed the dance. They danced it without a mistake. And so they felt sure that the god of the reindeer would give them success in the chase.