When they came to the valley where Bolo had seen the mammoths they found nothing but trampled grass and the broken limbs of trees. They went very slowly and carefully after that. It was not long till a man, who had climbed into a very tall tree on a hilltop, called out excitedly that he could see something moving at the base of a cliff that hung high and steep above the river. One Eye climbed the tree himself, and looked long and closely where the man pointed.