"So he organized around the idea of creating a, a—"

"A communicant, a human interface with the Hypotheticals. He was very serious about it. He recruited his group from among our community and then did his best to seal them away from us. They became much more secretive once the process was underway."

"You couldn't stop him?"

"We tried, of course. Dvali's project wasn't the first such attempt. In the past, the intervention of other Fourths was enough to quell the effort—abetted, when necessary, by Sulean Moi, whose authority among most Fourths is unquestionable. But Dr. Dvali was immune to moral suasion, and by the time Sulean Moi arrived, he and his group were in hiding. We've had very sporadic contact with them since—too little and too late to stop them."

"You mean there's a child?"

"Yes. His name, I'm told, is Isaac. He would be twelve years old by now."

"My father disappeared twelve years ago. You think he might have joined this group?"

"No—from your description of him and my knowledge of Dvali's recruiting, no, I'm sorry, he's not among them."

"Then maybe he knew something dangerous about them—maybe they abducted him."

"As Fourths we're inhibited against that kind of violence. What you're suggesting isn't impossible, but it's extremely unlikely. I've never heard even a rumor that Dvali was capable of such a thing. If anything like that happened to your father, it was more likely the work of Genomic Security. They were sniffing at Dvali's heels even then."

"Why would DGS kidnap my father?"

"Presumably to interrogate him. If he resisted—" Diane shrugged unhappily.

"Why would he resist?"

"I don't know. I never met your father. I can't answer that."

"They interrogated him and then, what, killed him?"

"I don't know."

Turk said, "They have what they call Executive Action Committees in DGS, Lise. They write their own legal ticket and they do what they want. I'm pretty sure that's who took Tomas Ginn. Tomas is a Fourth, and Fourths are notoriously hard to interrogate—they're not especially afraid of death and they have a high tolerance to pain. Getting any information out of a stubborn Fourth means putting him through a process that's usually, in the end, fatal."

"They killed Tomas?"

"I expect so. Or transported him to some secret prison to kill him a little more slowly."

Could Brian have known about this, learned about it at work? Lise had a brief but horrifying vision of the DGS staff at the consulate laughing at her, at her naive quest to uncover the truth about her father. She had been walking over an abyss on a skin of thin ice, nothing to protect her but her own ignorance.

But—no. As an institution, Genomic Security might be capable of that; Brian was not. Unhappy as she had been in her marriage, she knew Brian intimately. Brian was many things. But he was not a murderer.

* * * * *