The beat-beat-beat of chopper blades was as good as a police siren when it came to announcing their approach, so they set down a kilometer away from the medical center. Four soldiers on each chopper were equipped with slimline motorcycles, and they took off to secure all the vehicle exit points. The rest advanced through the yards and parking lots of houses, apartment buildings, and small businesses.

Since the entire population of Rwanda was trained as soldiers, they knew enough to stay indoors as they watched the dark-green-clad soldiers of the Hegemony jog cross-lots, from cover to cover. They might try to telephone the government to find out what was happening, but cellphones were getting a "we're making your service better, please have patience" message and landlines were hearing that "all circuits are busy."

Petra was pregnant enough now that she didn't jog along with the troops. And Bean was so distinctively large that he, too, remained in the choppers with the pilots. But Bean had trained these men and had no doubt of their ability. Besides, Suriyawong, still trying to rehabilitate himself even though Bean had assured him that he had his full trust, was eager to show that he could fulfill the mission perfectly without Bean's direct supervision.

So it was only fifteen minutes before Suriyawong texted them "fa," which either meant fait accompli or the fourth note of the musical scale, depending on what mood Bean was in. This time when he saw the message he sang it out, and the choppers rose into the air.

They came down in the parking lot of the medical complex. As befitted a rich country like Rwanda, it was state of the art; but the architecture was designed to make the place feel homelike to its patients. So it looked for all the world like a village, with every room that did not need a controlled environment open to whatever breezes blew.

Volescu was being held in the climate-controlled lab where he was arrested. He nodded gravely to Bean and Petra when they came inside. "How nice to see you again," he said.

"Was anything you told us true?" asked Petra. Her voice was calm, but she wasn't going to pretend that pleasantries were in order.

Volescu gave a little smile and shrug. "Doing what the boy wanted seemed to be a good idea at the time. He promised me ... this."

"A place to conduct illegal research?" asked Bean.

"Oddly enough," said Volescu, "in our new days of freedom now that the Hegemony is powerless, my research is not illegal here. So I don't have to be prepared to dispose of my subjects at a moment's notice."

Bean looked at Petra. "He still says 'dispose of instead of 'murder.' "

Volescu's smile grew sad. "How I wish I had all your brothers," he said. "But that's not why you're here. I already served my time and was legally released."

"We want our babies back," said Petra. "All eight of them. Unless there are more."

"There were never more than eight," said Volescu. "I was observed the whole time, as you arranged, and there is no way I could have faked the number. Nor could I have faked the destruction of the three discards."

"I've already thought of several," said Bean. "The most obvious being that the three you pretended to find had Anton's Key turned had already been taken away. What you destroyed were someone else's embryos. Or nothing at all."

"If you know so much, why do you need me?" asked Volescu.

"Eight names and addresses," said Bean. "The women who are bearing our babies."

"Even if I knew," said Volescu, "what purpose would be served by telling? None of them have Anton's Key. They aren't worth studying."

"There is no nondestructive test," said Petra. "So you don't know which of them had Anton's Key turned. You would have kept them all. You would have implanted them all."

"Again, since you know more than I do, by all means tell me when you find them. I'd love to know what Achilles did with the five survivors."

Bean walked up to his biological half-uncle. He towered over him.

"My," said Volescu. "What big teeth you have."

Bean took him by the shoulders. Volescu's arms seemed so small and fragile within the grasp of Bean's huge hands. Bean probed and pressed with his fingers. Volescu winced.

Bean's hands wandered idly along Volescu's shoulders until his right hand nested the back of the man's neck, and his thumb played with the point of Volescu's larynx. "Lie to me again," whispered Bean.

"You'd think," said Volescu, "that someone who used to be small would know better than to be a bully."

"We all used to be small," said Petra. "Let go of his neck, Bean."

"Let me crush his larynx just a little."

"He's too confident," said Petra. "He's very sure we'll never find them."

"So many babies," said Volescu genially. "So little time."

"He's counting on us not torturing him," said Bean.

"Or maybe he wants us to," said Petra. "Who knows how his brain works? The only difference between Volescu and Achilles is the size of their ambitions. Volescu's dreams are so very, very small."

Volescu's eyes were welling up with tears. "I still think of you as my only son," he said to Bean. "It grieves me that we don't communicate any better than this."

Bean's thumb massaged the skin of Volescu's throat in circles around the point of his larynx.

"It surprises me that you can always find a place to do your sick little brand of science," said Petra. "But this lab is closed now. The Rwandan government will have its scientists go over it to find out what you were doing."

"Always I do the work while others get the credit," said Volescu.

"Do you see how I nearly encircle his throat with just one hand?" said Bean.

"Let's take him back to Ribeirão Preto, Julian."

"That would be nice," said Volescu. "How are my sister and her husband doing? Or do you see them anymore, now that you've got to be so important?"

"He's talking about my family," said Bean, "as if he were not the monster who cloned my brother illegally and then murdered all but one of the clones."

"They've gone back to Greece," said Petra. "Please don't kill him, Bean. Please."

"Remind me why."

"Because we're good people," said Petra.

Volescu laughed. "You live by murder. How many people have you both killed? And if we add in all the Buggers you slaughtered out in space...."

"All right," said Petra. "Go ahead and kill him."

Bean tightened his fingers. Not that much, really. But Volescu made a strangled sound in his throat and in moments his eyes were bugging out.

At that moment Suriyawong entered the lab. "General Delphiki, sir," he said.

"Just a minute, Suri," said Petra. "He's killing somebody."

"Sir," said Suriyawong. "This is a war materials lab."

Bean relaxed his grip. "Still genetic research?"

"Several of the other scientists working here had misgivings about Volescu's work and the sources of his grants. They were collecting evidence. Not much to collect. But everything points to Volescu breeding a common-cold virus that would carry genetic alterations."

"That wouldn't affect adults," said Bean.

"I shouldn't have said war materials," said Suriyawong, "but I thought that would stop your little game of strangulation faster."

"What is it, then?" asked Bean.

"It's a project to alter the human genome," said Suriyawong.

"We know that's what he worked with," said Petra.

"But not with viruses as carriers," said Bean. "What were you doing here, Volescu?"

Volescu choked out some words. "Fulfilling the terms of my grants."

"Grants from whom?"

"The grant granters," said Volescu.

"Lock this place down," said Bean to Suriyawong. "I'll call the Hegemon to request a Rwandan perimeter guard."

"I think," said Petra, "that our brilliant scientist friend had some bizarre notion of remaking the human race."