It was a cold winter's evening late in the Stone Age; the sun had gone down blazing over the plains of Thold; there were no clouds, only the chill blue sky and the imminence of stars; and the surface of the sleeping Earth began to harden against the cold of the night. Presently from their lairs arose, and shook themselves and went stealthily forth, those of Earth's children to whom it is the law to prowl abroad as soon as the dusk has fallen. And they went pattering softly over the plain, and their eyes shone in the dark, and crossed and recrossed one another in their courses. Suddenly there became manifest in the midst of the plain that fearful portent of the presence of Man—a little flickering fire. And the children of Earth who prowl abroad by night looked sideways at it and snarled and edged away; all but the wolves, who came a little nearer, for it was winter and the wolves were hungry, and they had come in thousands from the mountains, and they said in their hearts, "We are strong." Around the fire a little tribe was encamped. They, too, had come from the mountains, and from lands beyond them, but it was in the mountains that the wolves first winded them; they picked up bones at first that the tribe had dropped, but they were closer now and on all sides. It was Loz who had lit the fire. He had killed a small furry beast, hurling his stone axe at it, and had gathered a quantity of reddish-brown stones, and had laid them in a long row, and placed bits of the small beast all along it; then he lit a fire on each side, and the stones heated, and the bits began to cook. It was at this time that the tribe noticed that the wolves who had followed them so far were no longer content with the scraps of deserted encampments. A line of yellow eyes surrounded them, and when it moved it was to come nearer. So the men of the tribe hastily tore up brushwood, and felled a small tree with their flint axes, and heaped it all over the fire that Loz had made, 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.
 
It was not for many days that any other man tried to make for himself an iron sword by cooking the same kind of small furry beast that Loz had tried to cook. It was not for many years that any thought to lay the meat along stones as Loz had done; and when they did, being no longer on the plains of Thold, they used flints or chalk. It was not for many generations that another piece of iron ore was melted and the secret slowly guessed. Nevertheless one of Earth's many veils was torn aside by Loz to give us ultimately the steel sword and the plough, machinery and factories; let us not blame Loz if we think that he did wrong, for he did all in ignorance. The tribe moved on until it came to water, and there it settled down under a hill, and they built their huts there. Very soon they had to fight with another tribe, a tribe that was stronger than they; but the sword of Loz was terrible and his tribe slew their foes. You might make one blow at Loz, but then would come one thrust from that iron sword, and there was no way of surviving it. No one could fight with Loz. And he became ruler of the tribe in the place of Iz, who hitherto had ruled it with his sharp axe, as his father had before him.
 
Now Loz begat Lo, and in his old age gave his sword to him, and Lo ruled the tribe with it. And Lo called the name of the sword Death, because it was so swift and terrible.
 
And Iz begat Ird, who was of no account. And Ird hated Lo because he was of no account by reason of the iron sword of Lo.
 
One night Ird stole down to the hut of Lo, carrying his sharp axe, and he went very softly, but Lo's dog, Warner, heard him coming, and he growled softly by his master's door. When Ird came to the hut he heard Lo talking gently to his sword. And Lo was saying, "Lie still, Death. Rest, rest, old sword," and then, "What, again, Death? ............