Wolff whirled the stone at the belt-end and loosed it at the gworl. The creature flipped its knife at him; Wolff dodged but spoiled his aim of the stone. It flew over the furry bumpy head; the thrown knife brushed him lightly on his shoulder. He jumped for his own knife on the floor of the cave, saw another dark shape drop into the cave from above, and a third come around the corner of the mouth.

Something hit his head. His vision blurred, his senses grew dim, his knees buckled.

When he awoke, a pain in the side of his head, he had a frightening sensation. He seemed to be upside down and floating above a vast polished black disc. A rope was tied around his neck, and his hands were tied behind his back. He was hanging with his feet up in the empty air, yet there was only a slight tension of rope around his neck.

Bending his head back, he could see that the rope led upward into a shaft in the disc and that at the far end of the shaft was a pale light.

He groaned and closed his eyes, but opened them again. The world seemed to spin. Suddenly he was reoriented. Now he knew that he was not suspended upside down against all the laws of gravity. He was hanging by a rope from the bottom underside of the planet. The green below him was the sky.

He thought, I should have strangled before now. But there is no gravity pulling me downward.

He kicked his feet, and the reaction drove him upward. The mouth of the shaft came closer. His head entered it, but something resisted him. His motion slowed, stopped, and, as if there were an invisible and compressed spring against his head, he began to move back down. Not until the rope tightened again did he stop his flight.

The gworl had done this to him. After knocking him out, they had let him down the shaft, or more probably, had carried him down. The shaft was narrow enough for a man to get down it with his back to one wall and his feet braced against the other. The descent would scrape the skin off a man, but the hairy hide of the gworl had looked tough enough to withstand descent and ascent without injury. Then a rope had been lowered, placed around his neck, and he had been dropped through the hole in the bottom of the world.

There was no way of getting himself back up. He would starve to death. His body would dangle in the winds of space until the rope rotted. He would not then fall, but would drift about in the shadow cast by the disc. The gworl he had knocked off the ledge had fallen, but their acceleration had kept them going.

Though despairing because of his situation, he could not help speculating about the gravitational configuration of the flat planet. The center must be at the very bottom; all attraction was upward through the mass of the planet. On this side, there was none.

What had the gworl done to Chryseis? Had they killed her as they had her friend?

He knew then that however they had dealt with her, they had purposely not hung her with him. They had planned that part of his agony would be that of

not knowing her fate. As long as he could live at the end of this rope, he would wonder what had happened to her. He would conjure a multitude of possibilities, all horrible.

For a long time he hung suspended at a slight degree from the perpendicular, since the wind held him steady. Here, where there was no gravity, he could not swing like a pendulum.

Although he remained in the shadow of the black disc, he could see the progress of the sun. The sun itself was invisible, hidden by the disc, but the light from it fell on the rim of the great curve and slowly marched along it. The green sky beneath the sun glowed brightly, while the unlit portions before and after became dark. Then a paler lighting along the edge of the disc came into his sight, and he knew that the moon was following the sun.

It must he midnight, he thought. If the gworl are taking her someplace, they could he some distance out on the sea. If they've been torturing her, she could he dead. If they've hurt her, I hope she's dead.

Abruptly, while he hung in the gloom beneath the bottom of the world, he felt the rope at his neck jerk. The noose tightened, although not enough to choke him, and he was being drawn upward toward the shaft. He craned his neck to see who was hauling him up, but he could not penetrate the darkness of the mouth of the shaft. Then his head broke through the web of gravity—like surface tension on water, he thought—and he was hoisted clear of the abyss. Great strong hands and arms came around him to hug him against a hard, warm, furry chest. An alcoholic breath blew into his face. A leathery mouth scraped his cheek as the creature hugged him closer and began inching up the shaft with Wolff in its arms. Fur scraped on rock as the thing pushed with its legs. There was a jerk as the legs came up suddenly and took a new hold, followed by another scrape and lunge upward.

"Ipsewas?" Wolff said.

The zebrilla replied, "Ipsewas. Don't talk now. I have to save my wind. This isn't easy."

Wolff obeyed, although he had a difficult time in not asking about Chryseis. When they reached the top of the shaft, Ipsewas removed the rope from his neck and tossed him onto the floor of the cave.

Now at last he dared to speak. "Where is Chryseis?"

Ipsewas landed on the cave floor softly, turned Wolff over, and began to untie the knots around his wrists. He was breathing heavily from the trip up the shaft, but he said, "The gworl took her with them to a big dugout and began to sail across the sea toward the mountain. She shouted at me, begged me to help her. Then a gworl hit her, knocked her unconscious, I suppose. I was sitting there, drunk as the Lord, half-unconscious myself with nut juice, having a good time with Autonoe—you know, the akowile with the big mouth.

"Before Chryseis was knocked out, she screamed something about you hanging from the Hole in the Bottom of the World. I didn't know what she was talking about, because it's been a long time since I was here. How long ago I hate to say. Matter of fact, I don't really know. Everything's pretty much of a haze anymore, you know."

"No, I don't," Wolff said. He rose and rubbed his wrists. "But I'm afraid that if I stay here much

longer, I might end up in an alcoholic fog, too."

"I was thinking about going after her," Ipsewas said. "But the gworl flashed those long knives at me and said they'd kill me. I watched them drag their boat out of the bushes, and about then I decided, what the hell, if they killed me, so what? I wasn't going to let them get away with threatening me or taking poor little Chryseis off to only the Lord knows what. Chryseis and I were friends in the old days, in the Troad, you know, although we haven't had too much to do with each other here for some time. I think it's been a long time. Anyway, I suddenly craved some real adventure, some genuine excitement—and I loathed those monstrous bumpy creatures.

"I ran after them, but by then they'd launched the boat, with Chryseis in it. I looked around for a histoikhthys, thinking I could ram their boat with it. Once I had them in the water, they'd be mine, knives or not. The way they acted in the boat showed me that they felt far from confident on the sea. I doubt they can even swim."

"I doubt it, too." Wolff said.

"But there wasn't a histoikhthys in reaching distance. And the wind was taking the boat away; it had a large lateen sail. I went back to Autonoe and took another drink. I might have forgotten about you, just as I was trying to forget about Chryseis. I was sure she was going to get hurt, and I couldn't bear to think about it, so I wanted to drink myself into oblivion. But Autonoe, bless her poor boozed-up brain, reminded me of what Chryseis had said about you."

"I took off fast, and looked around for awhile, because I couldn't remember just where the ledges were that led to the cave. I almost gave up and started drinking again. But something kept me going. Maybe I wanted to do just one good thing in this eternity of doing nothing, good or evil."