and for a while the great heap hid the flame, and the wolves came trotting in and sat down again on their haunches much closer than before; and the fierce and valiant dogs that belonged to the tribe believed that their end was about to come while fighting, as they had long since prophesied it would. Then the flame caught the lofty stack of brushwood, and rushed out of it, and ran up the side of it, and stood up haughtily far over the top, and the wolves seeing this terrible ally of Man reveling there in his strength, and knowing nothing of this frequent treachery to his masters, went slowly away as though they had other purposes. And for the rest of that night the dogs of the encampment cried out to them and besought them to come back. But the tribe lay down all round the fire under thick furs and slept. And a great wind arose and blew into the roaring heart of the fire till it was red no longer, but all pallid with heat. With the dawn the tribe awoke. Loz might have known that after such a mighty conflagration nothing could remain of his small furry beast, but there was hunger in him and little reason as he searched among the ashes. What he found there amazed him beyond measure; there was no meat, there was not even his row of reddish-brown stones, but something longer than a man's leg and narrower than his hand, was lying there like a great flattened snake. When Loz looked at its thin edges and saw that it ran to a point, he picked up stones to chip it and make it sharp. It was the instinct of Loz to sharpen things. When he found that it could not be chipped his wonderment increased. It was many hours before he discovered that he could sharpen the edges by rubbing them with a stone; but at last the point was sharp, and all one side of it except near the end, where Loz held it in his hand. And Loz lifted it and brandished it, and the Stone Age was over. That afternoon in the little encampment, just as the tribe moved on, the Stone Age passed away, which, for perhaps thirty or forty thousand years, had slowly lifted Man from among the beasts and left him with his supremacy beyond all hope of reconquest.