blossom on an alien tree, separate and apart from that stalk. Aside from their wings, in physical appearance they resembled man only as man in his highest form resembles the great apes. In spiritual, esthetic and intellectual development they were superior to man as man is superior to the gorilla. But when they reared their colossal city, man’s primal ancestors had not yet risen from the slime of the primordial seas.
These beings were mortal, as are all things built of flesh and blood. They lived, loved, and died, though the individual span of life was enormous. Then, after uncounted millions of years, the Change began. The vista shimmered and wavered, like a picture thrown on a wind-blown curtain. Over the city and the land the ages flowed as waves flow over a beach, and each wave brought alterations. Somewhere on the planet the magnetic centers were shifting; the great glaciers and ice-fields were withdrawing toward the new poles.
The littoral of the great river altered. Plains turned into swamps that stank with reptilian life. Where fertile meadows had rolled, forests reared up, growing into dank jungles. The changing ages wrought on the inhabitants of the city as well. They did not migrate to fresher lands. Reasons inexplicable to humanity held them to the ancient city and their doom. And as that once rich and mighty land sank deeper and deeper into the black mire of the sunless jungle, so into the chaos of squalling jungle life sank the people of the city. Terrific convulsions shook the earth; the nights were lurid with spouting volcanoes that fringed the dark horizons with red pillars.
After an earthquake that shook down the outer walls and highest towers of the city, and caused the river to run black for days with some lethal substance spewed up from the subterranean depths, a frightful chemical change became apparent in the waters the folk had drunk for millenniums uncountable.
Many died who drank of it; and in those who lived, the drinking wrought change, subtle, gradual and grisly. In adapting themselves to the changing conditions, they had sunk far below their original level. But the lethal waters altered them even more horribly, from generation to more bestial generation. They who had been winged gods became pinioned demons, with all that remained of their ancestors’ vast knowledge distorted and perverted and twisted into ghastly paths. As they had risen higher than mankind might dream, so they sank lower than man’s maddest nightmares reach. They died fast, by cannibalism, and horrible feuds fought out in the murk of the midnight jungle. And at last among the lichen-grown ruins of their city only a single shape lurked, a stunted abhorrent perversion of nature.
Then for the first time humans appeared: dark-skinned, hawk-faced men in copper and leather harness, bearing bows—the warriors of prehistoric Stygia. There were only fifty of them, and they were haggard and gaunt with starvation and prolonged effort, stained and scratched with jungle-wandering, with blood-crusted bandages that told of fierce fighting. In their minds was a tale of warfare and defeat, and flight before a stronger tribe which drove them ever southward, until they lost themselves in the green ocean of jungle and river.
Exhausted they lay down among the ruins where red blossoms that bloom but once in a century waved in the full moon, and sleep fell upon them. And as they slept, a hideous shape crept red-eyed from the shadows and performed weird and
