“Look!” said Chew-chew as the leader of a herd plunged into the river.

The herd plunged too, for reindeer know it is best to follow their leader. The reindeer swam through the deep water and waded out to the opposite bank. Then the frightened creatures hurried on toward the well-known ford.

“The reindeer swam through the deep water and waded out to the opposite bank.”

“Why did the reindeer jump into the river?” asked Fleetfoot of Chew-chew. Before she could answer Eagle-eye pointed to a big cave-bear. The cave-bear was going into a thicket when Fleetfoot heard his mother say, “Cave-bears and hyenas hide in the thickets. They lie in wait for the herds.”

Scarface seemed to be lying in wait on some rocks by an evergreen tree. He had stopped on his way to the reindeer pass to see what had frightened the herd.

While the men were going to the pass, the reindeer were gathering at the ford. Several herds of two or three hundred each were already there. Other herds were coming. The flat sandy banks on one side of the river were already covered with reindeer. Soon the ford was filled, and the reindeer began to press up the narrow river valley.

When at last all the herds from the wooded hills were gathered at the ford, the handsomest leader of all stepped forth to lead the way. After looking around to see if an enemy was near, he started up the well-trodden trail through the narrow river valley.

Slowly the great herd began to move. To those watching from the cliff, it looked like a moving forest. Those in advance were soon out of sight, and were going toward the pass.