"Yellow and red?" echoed Hull. "There are a few black men called Nigs in Ozarky, but I never heard of yellow or red men."

"I have seen yellow men," said Old Einar. "There are some towns of yellow men on the edge of the western ocean, in the region called Friscia. The red race, they say, is gone, wiped out by the plague called the Grey Death, to which they yielded more readily than the other races."

"I have heard of the Grey Death," said Hull. "When I was very young, there was an old, old man who used to say that his grand-father had lived in the days of the Death."

Old Einar smiled. "I doubt it, Hull. It was something over two and a half centuries ago. However," he resumed, "the great ancient nations were at war, and as I say, they fought with diseases. Whether some nation learned the secret of the Grey Death, or whether it grew up as a sort of cross between two or more other diseases, I do not know. Martin Sair says that diseases are living things, so it may be so. At any rate, the Grey Death leaped suddenly across the world, striking alike at all people. Everywhere it blasted the armies, the cities, the countryside, and of those it struck, six out of every ten died. There must have been chaos in the world; we have not a single book printed during that time, and only legend tells the story.

"But the war collapsed. Armies suddenly found themselves unopposed, and then were blasted before they could move. Ships in mid-ocean were stricken, and drifted unmanned to pile in wreckage, or to destroy others. In the cities the dead were piled in the streets, and after a while, were simply left where they fell, while those who survived fled away into the country. What remained of the armies became little better than roving robber bands, and by the third year of the plague there were few if any stable governments in the world."