Vengeance had gone into the nullfield bowl that contained the black hole. In a fraction of a second the mass of rock was churned into a mixture of lava, hot gas, and plasma. It splashed.

Immediately, the hole began to devour it. The gravity gradient quickly collapsed the matter close to the hole and began to pull it down the bottomless pit, releasing energy as it was compressed. As matter was destroyed, more moved in, but was pushed away by the pressure of the reactions happening just outside the vent horizon. There was a huge explosion, and ninety percent of the mass of Vengeance was blown free of the combined gravity of Poseidon and the hole. What was left began to collapse again.

None of this made any difference to the hemisphere of the nullfield. It was proof against anything the human race had yet been able to produce. The impact of Vengeance had no effect on it.

But Lilo watched very closely to see how the electromagnetic field generators were withstanding the strain. The one wild card in Parameter's equation was the generators. They were already supporting the mass of the hole. What could not be known for sure was whether they would hold up under the sudden acceleration caused by the impact. If they failed, the hole would start to drift downward, quickly destroying the nullfield generator beneath it. With the field off, the hole would drift through Poseidon as if it were empty space, and they would have to try to recover it on the other side.

"I don't see any movement, do you?" Lilo asked.

"No. It seems to be holding."

There were more explosions, coming only a few seconds apart, until the molten remains of the rock had rid itself of enough mass to reach stability. Now it was a tightly packed white-hot star, brighter than the surface of the sun, and only about a meter in diameter.

"Let the astronomers wonder about that for a while," Lilo said, and turned on the radio. "Can you hear me down there? Vaffa, Vaffa, are you listening?"

There was no answer for a while, and Lilo kept repeating herself until a male voice came over the radio.

"Who is calling?"

"This is Lilo, returned from the dead. And Cathay is with me. We brought back your ship, along with a present. You felt it coming in a few minutes ago. Is anyone hurt?"

"I don't know," Vaffa said, impatiently.

Lilo understood that he really didn't care, either. She shivered. It was her first contact with Vaffa.

"Just what did you hope to accomplish, anyway? You must have known you couldn't kill us with whatever you did. The best you could hope for was to entomb a few of us—which you did—but our suits will protect us until we can dig out. Which we are doing." The voice was imperious, used to being obeyed, but there was a note of uncertainty.

"He's damn sure you're not that dumb," Cathay said, with satisfaction. "Sometimes it doesn't help your nerves to know a lot about someone."

"I hope so," Lilo whispered. Then, into the mike: "What we accomplished is to push Poseidon out of its orbit. That's done, and it's too late to do anything about it. It was spectacular, let me tell you. In a few minutes people all over the system will be wondering what's going on out here. Does that suggest anything to you?"

There was silence from the other end.

"Before you run off to consult with the Boss, there's some things he needs to know. The way we figure it is simple. Everyone's going to wonder what's going on out here, but they'll figure it's Invaders up to something. This is Jupiter, after all. They won't dare send anyone to investigate. You can see if Tweed agrees with that."

There was no reply, so Lilo went on.

"We would like to point out that we are in possession of a powerful radio. I'm sure Tweed's been worried about that for some time now, wondering where Cathay is and what he's going to do. He's probably ready to get out, quick, if something should start to break. Okay, that's fine. But it's bound to take him some time. What we want you to ask him is this: How much time is he willing to buy?"

"Explain that, please."

"I was going to. First, an answer from you. How long would it take you, not counting ninety-six minutes of lagtime, to get Tweed on the radio, talk to him and get his answer? Don't hesitate; tell me right now." Cathay had emphasized the importance of that. According to him, Vaffa was not very bright, and was not a good liar. He should not be given time to think. They would be helped by the fact that his impulse would be to ask Tweed for orders as soon as possible.

"Well, I..."

"Now! Tweed's life depends on this. Don't make us doubt what you're saying."

"I speak to him in code, through a laser that is relayed to Luna by a satellite, so the signal will not be traced. The lagtime will be ninety-seven minutes today, because of that. He carries a prompter; it has never taken me longer than three minutes to get to him."

"Very well. It's bargaining time. Cathay and I are interested in the fate of the people under your guard. We realize that you are capable, if ordered to do it, of killing them. Tweed might order you to do that, we decided." Lilo found it hard to believe, but admitted that Cathay knew more about Tweed and Vaffa than she did.

"We want you to tell the Boss that would be a very stupid thing to do.

"We're going to broadcast the facts about the Poseidon installation all over the system. If they catch him, they'll kill him.

"The important thing to him is when we do this broadcasting. Now listen carefully. If he does as we tell him, we will hold off for a period of one standard month. Obviously, it's not in our interest to publicize this place. We don't want it known what's going on out here because we're all illegals in one way or another, including you. If an Eight Worlds ship lands on Poseidon, we'll all be executed.

"What we have to do is work toward our common interests. We need time, and so does Tweed. But we also need assurances that the people down there will not be massacred." She took a deep breath.

"Here's the deal. Tweed is to issue orders to you, and all your clone brothers and sisters, to leave the station and congregate in the open one kilometer from the nearest entrance. Unarmed. Before you leave, you are to deactivate the barrier leading to your private quarters and allow Niobe and Vejay to enter and see for themselves that no one is still inside. After that—"

"I've just learned that Vejay is unaccounted for," the man said. "Apparently he is buried. Niobe is here."

"All right. After Niobe has entered your quarters and seen you depart from the station, she will tell us so. We will then land and take you prisoner. Tweed is to further order you, in the hearing of Niobe and anyone else she wants with her, that you are not to harm anyone, now or in the future.

"In return for this, you and your clones will be allowed to live, as long as you stick to your orders. Tweed will be given one month to get away from Luna, to do whatever he planned to do to get underground if he was discovered."

"How do we know you'll keep your word about not killing us?" Vaffa said. For the first time, he sounded worried, and Cathay slapped Lilo on the shoulder. Lilo grinned back at him.

"Obviously you can't be sure. You'll have to take my word for it. But your alternative is certain death, if an Eight Worlds ship is brought here in response to what we have to say, or if you harm the prisoners. Understand, we will broadcast if we have to. If Tweed won't accept our terms, it means all the people down there will be killed by you, anyway, so there's nothing for us to lose. This way you have a chance to live, too.

"Tweed's alternative is simple, too. He has exactly one hundred and fifteen minutes from right now to comply with our demands. If we don't hear from Niobe in that time, we start talking."