Her strength of character was responsible for that, of course. It shone through her violet eyes like sun through stained glass, animating her aquiline features. One could hear it in her clear contralto, see it in the brisk pace with which her stocky body moved. No wonder the whole city loved her.

Now she got out of the sedan chair with infinite care, as if every motion hurt. She had to lean on the priest's arm for a moment. Her body seemed shrunken within the heavy, elaborately fringed robe of state, shot all through with golden thread. She held the royal crown?a massy silver circlet encrusted with river pearls and other stones that glowed softly, like moonlight?in her hands instead of wearing it. Her face was more gray than pink.

"My God, she's dying!" Ware blurted.

"Yes, and heaven help Helmand after she goes," Crouzet agreed. The one thing Sabium had not done was provide for a successor. Probably, Ware thought, she was too proud to admit to herself that her body had betrayed her.

She could still force it to obey her for a time, though, and she carried on with the ceremony as if nothing were wrong. Her voice rang through the square: "Shumukin, son of Galzu, ascend to join me!"

A small, lithe man climbed the steps and went on his knees in front of the queen. Sabium declared, "For the beauty of your new hymn to Illil, I reward you with half a diktat of refined gold and the title of ludlul." The rank was of the lesser nobility; Shumukin went down on his belly in gratitude. The trumpeters at the edge of the square struck up a new tune, presumably Shumukin's hymn. The crowd applauded. Shumukin rose, smiling shyly, and stepped to one side.

There was a visible pause while Sabium gathered herself. The priest spoke to her, too softly for the Terrans to hear. She waved him aside and called out, "M'gishen, son of Nadin, ascend and join me!"

This time the Helmandi was old and stout. He leaned on a stick going up the stairs. The priest held the cane as he clumsily got to his knees. Sabium said, "For sharing with all of Helmand what you have learned, I reward you with three diktats of refined gold and the rank of shaushludlul." That was a higher title than the one Shumukin had earned. M'gishen prostrated himself before the queen.

Sabium bent to bid him rise and could not hide a wince of pain. "Tell the people of what you found."

Shifting from foot to foot like a nervous schoolboy, M'gishen obeyed. His thin, reedy voice did not carry well. He had to start over two or three times before the calls of "Louder!" stopped coming from the back of the marketplace.

"Everybody knows what a taper is, of course," he said. "You take a wick and dip it in hot tallow. Well, if you dip it again and again and again, more and more tallow clings, y' see. When you light it then, it gives off a real glow like an oil lamp, not just a tiny little flame. Lasts as long as a lamp, too, maybe longer. Eh, well, that's what my new thing is." He reclaimed his stick and limped down the steps.

"Rewards await anyone who learns something new and useful and passes on his knowledge or who shows himself a worthy poet or sculptor or painter," Sabium said. "I set aside the first morning of every nineday to judge such things, and hope to see many of you then."

"Amazingly sophisticated attitude to find in such a primitive society," Crouzet remarked.

"I'm sorry, what was that?" David Ware had been watching the priest of Illil help Sabium back into the sedan chair. The process was slow and agonizing; he saw her bite down hard on her lower lip to distract herself from the other, greater torment. It was a relief when the silk draperies gave her back her privacy.

Crouzet repeated himself. "Oh, yes, absolutely," Ware agreed. "For this sort of culture it's better than a patent system; the bureaucracy to run anything like that won't exist here for hundreds of years. But the up-front reward encourages people to put ideas into the public domain instead of hanging on to them as family secrets."

"To say nothing of spurring invention." Crouzet's eyes followed the servitors bearing Sabium back to the palace. "What do you think the odds are of whoever comes after her keeping up what she's started?"

Ware laughed without humor. "What's the old saying? Two chances?slim and none."

"I'm afraid you're right. Sometimes the rule of noninterference is a shame." Survey Service personnel on worlds without spaceflight were observers only, doing nothing to meddle in local affairs.

When Ware did not reply at once, Crouzet turned to look at him. His colleague's face was a mask of furious concentration. Crouzet was no telepath, but he did not need to be to know what the other Terran was thinking. Alarm replaced the black man's usual amused detachment. "For God's sake, David! There's never justification for breaking the noninterference rule!"

"The hell there isn't," David Ware said.

Lucrezia Spini played the tape of Queen Sabium in the marketplace for the fourth time. "Yes, it might be a malignancy," the biologist said. "If I had to make a guess just from seeing this and from the speed of the illness's advance, I'd say it could well be. But making a real diagnosis on this kind of evidence is pure guesswork. There are so many ways to fall sick, and on a world like this we'll only learn a tiny fraction of them."

"What can you do to pin it down more closely?" Ware asked. A flier had brought him and Crouzet back to the Leeuwenhoek the night before. They had summoned the machine to a field several kilometers outside Helmand. It was silent; the local fear of demons who dwelt in darkness made the chance of being observed vanishingly small. The Leeuwenhoek itself had landed in the northern desert, safe from detection.

Spini rubbed her chin as she thought; had she been a man, she would have been the type to grow a beard for the sake of plucking at it. At last she said, "I suppose I could sneak a small infrared sensor onto the roof of the queen's bedchamber and do a body scan. If there are tumors, they'll show up warmer than the surrounding normal body areas."

"Would you?" Ware tried to hold the eagerness from his voice. He had kept quiet about his gut reaction back in the marketplace. If Sabium was suffering from some exotic local disease, she would die, and that was all there was to it. If, on the other hand, she had cancer… Time enough to worry about that when he knew.

"Why not? Either way, I'll learn something." When the anthropologist kept hovering over her, she laughed at him. "I don't have the answers yet, you know. I have to program the sensor, camouflage it, and send it out. Come back in three days and I may be able to give you something."

Ware had plenty to keep him busy while he waited but could not help fretting. What if Sabium died while they were investigating? She had seemed so feeble. Ware also noticed Julian Crouzet giving him suspicious looks every so often. He pretended not to.

When the appointed day came, he fairly pounced on Lucrezia Spini, barking, "Well?"

She put a hand on his arm. "Easy, David, easy. Anyone would think you were in love with her."

He blinked. That had not occurred to him. He was honest enough with himself to take a long look at the idea. After a few seconds he said, "You know, I might be, if she came from a civilization comparable to ours. As is, I admire her tremendously. She's kindly but firm enough to rule, she boosts this culture in ways it couldn't expect for centuries yet, she's three times as smart as any of the local kings?and she carries on like a trouper in spite of what she's got. Whatever it is, she deserves better."

"No need to preach. I'm convinced." Spini laughed, but Ware could tell his earnestness had impressed her. She fed a cassette into the monitor in front of her. "This will interest you."