THE WINDOW WAS round and taller than the man. Even at that distance and though he was moving, they could see that he was not Urthona or Red Ore. It was impossible to tell without reference points how tall the young man was. His hair was brown and pulled tightly back as if it were tied in a pony tail. His features were handsome. He wore a suit of a cut which Kickaha had never seen before, but which Anana would tell him was of a style in fashion among the Lords a long time ago. The jacket glittered as if its threads were pulsing neon tubes. The shirt was ruffled and open at the neck.

Presently the man had passed them, but he reappeared a minute later at another window. Then they saw him racing by the windows. Finally, out of breath, he stopped and put his face to the corner window. After a while, he was out of sight.

"Did you recognize him?" Kickaha said.

"No, but that doesn't mean anything," Anana said. "There were many Lords, and even if I'd known him for a little while, I might have forgotten him after all those years."

"Not mean enough, heh?" Kickaha said. "Well then, if he isn't one of them, what's he doing in Urthona's palace? How'd he get there? And if he's interested in us, which he was from his actions, why didn't he change the controls to manual and stop the palace?"

She shrugged. "How would I know?"

"I didn't really expect you to. Maybe he doesn't know how to operate the controls. He may be trapped. I mean-he gated into the place and doesn't know how to get out."

"Or he's found the control room but is afraid to enter because he knows it'll be trapped."

McKay said, "Maybe he'll figure out a way to get in without getting caught."

"By then he won't be able to find us even if he wants to," she said.

"The palace'll be coming around again," Kick-aha said. "Maybe by then ..."

Anana shook her head. "I doubt the palace stays on the same orbit. It probably spirals around."

On the primary, the palace was only a few feet above the ground. Here, for some reason, if floated about a hundred feet from the surface. Anana speculated that Urthona might've set the automatic controls for this altitude because the palace would accompany the moon when it fell.

"He could go down with it and yet be distant enough so the palace wouldn't be disturbed by the impact."

"If that's so, then the impact must not be too terrible. If it were, the ground could easily buckle to a hundred feet or more. But what about a mountain falling over on it?"

"I don't know. But Urthona had a good reason for doing it. Unfortunately for us, it removes any chance for us to get to the palace while it's on the moon." They did not see the palace. Evidently, it did follow a spiral path.

The days and sometimes the nights that succeeded the appearance of the building were busy.

In addition to hunting, which took much time, they had to knock over and kill trees and skin the antelopes they slew. Branches were cut from the trees and shaped with axe and knife. The skins were scraped and dehaired, though not to Anana's satisfaction. She fashioned needles from wood and sewed the skins together. Then she cut away parts of these to make them the exact shape needed. After this, she sewed the triangular form onto the wooden structure.

The result was a three-cornered kite-shape. The rawhide strips used as substitutes for wires were tied onto the glider.

Anana had hoped to use a triangular trapeze bar for control. But their efforts to make one of three wooden pieces tied at the corners failed. It just wasn't structurally sound enough. It was likely to fall apart when subjected to stress of operation.

Instead, she settled for the parallel bar arrangement. The pilot would place his armpits over the bars and grasp the uprights. Control would be effected, she hoped, through shifting of the pilot's weight.

When the bars and uprights were installed, Anana frowned.

"I don't know if it'll stand up under the stress. Well, only one way to find out."

She got into position underneath the glider. Then, instead of running, as she would have had to do on the planet, she crouched down and leaped into the wind. She rose thirty-five feet, inclined the nose upwards a little to catch the wind, and glided for a short distance. She stalled the machine just before landing and settled down.

The others had bounded after her. She said, grinning, "The first antelope-hide glider in history has just made its first successful flight."

She continued making the short glides, stopping when she had gone two miles. They walked back then, and Kickaha, after receiving instructions again-for the twentieth time-tried his skill. McKay succeeded him without mishap, and they called it a day.

"Tomorrow we'll practice on the plain again," she said. "The day after, we'll go up a mountain a little ways and try our luck there. I want you two to get some practice in handling a glider in a fairly long glide. I don't expect you to become proficient. You just need to get the feel of handling it."

On the fifth day of practice, they tried some turns. Anana had warned them to pick up plenty of speed when they did, since the lower wing in a bank lost velocity. If it slowed down too much, the glider could stall. They followed her prescription faithfully and landed safely.

"It'd be nice if we could jump off a cliff and soar," she said. "That'd really give you practice. But there are no thermals. Still, you'd be able to glide higher. Maybe we should."

The men said that they'd like to give it a go. But they had to wait until a nearby mountain would form just the right shape needed. That is, a mountain with a slope on one side up which they could walk and more or less right-angles verticality on the other side. By the time that happened, she had built her parawing. This was not to be folded for opening when the jump was made. The hide was too stiff for that. It was braced with lightweight wood to form a rigid structure.

They climbed the mountain to the top. Anana, without any hesitation, grabbed the wing, holding it above her head but with its nose pointed down to

keep the wind from catching in it. She leaped off the four thousand foot high projection, released her hold, dropped, was caught in the harness, and was off. The two men retreated from the outthrust of earth just in time. With only a slight sound, the ledge gave way and fell.

They watched her descend, more swiftly than in the glider, pull the nose cords to dive faster, release them to allow the nose to lift, and then work the ropes so that she could bank somewhat.

When they saw her land, they turned and went back down the mountain.

The next day McKay jumped and the following day Kickaha went off the mountain. Both landed without accident.

Anana was pleased with their successful jumps. But she said, "The wing is too heavy to use over the primary. We have to find a lighter wood and something that'll be much lighter than the antelope hides for a wing-covering."

By then the covering was stinking badly. It was thrown away for the insects and the dogs to eat.

She did, however, make another wing, installing this time steering slots and antistall nose flaps. They took it up another mountain, the cliffside of which was only a thousand feet high. Anana jumped again and seemed to be doing well when a roc dived out of the sky and fastened its claw in the wing. It lifted then, flapping its wings, which had a breadth of fifty feet, heading for the mountain on which it roosted.

Anana threw her throwing axe upwards. Its point caught on the lower side of the bird's neck, then dropped. But the bird must have decided it had hold of a tough customer. It released the parawing, and she glided swiftly down. For a few minutes the bird followed her. If it had attacked her while she was on the ground, it could have had her in a defenseless situation. But it swooped over her, uttering a harsh cry, and then rose in search of less alien and dangerous prey.