"The fire will keep the man-eating things away," he said. "I ran not long ago with things behind me, and I would have been eaten had I not come upon a ring of fire like the one we have made. I leaped it and the eaters could not reach me. But, for the fire I leaped there was no wood. It came out of a crack in the ground. Some day we will go there and I will show you that thing which is so strange." The woman listened, delighted, but, at last, there was a nodding of the head. She lay back upon the grass a sleepy being. Ab looked at her and thought deeply. Where was safety? As they were, one of them must be awake all the time to keep the fire replenished. Until he could enter the cave again he must be weaponless. Only the fire could protect the two. They had heat and food and nothing to fear for the moment, but they must fairly eat their way into a safety which would be permanent! He kept the fire alight far into the darkness, and then, piling the fuel high all along the line of defense, he aroused the sleeping woman and told her she must keep the flames bright while he slept in his turn. She was just the wife for such an emergency as this, and rose uncomplainingly to do her part of the guarding work. From the forest all about came snarling sounds or threatening growls, and eyes blazed in the somber depths beneath the trees. There were hungry things out there and they wanted to eat a man and woman, but fire they feared. The woman was not afraid. After hours had passed the man awoke and took the woman's place and she slept in his stead. Morning came and the sounds from the forest died away partly, but the man and woman knew of the fierce creatures still lurking there. They knew what was before them. They must delve and eat their way into the cave as soon as possible.