"I'll do anything and everything in my power, up to—"

She put her finger to her lips. "I know. I accept you that way. But I'll keep trying to convince you."

"Zzzzello. Zzz. Hello. Hello." Someone was speaking to Xanthia from the end of a ten-kilometer metal pipe, shouting to be heard across a roomful of gongs and cymbals being knocked over by angry giant bees. She had never heard such interference.

"Hello?" she repeated. "What are you doing on my wavelength?"

"Hello." The interference was still there, but the voice was slightly more distinct. "Wavelength.

Searching, searching wavelength... get best reception with... Hello? Listening?"

"Yes, I'm listening. You're talking over... My radio isn't even..." She banged the radio panel with her palm in the ancient ritual humans employ when their creations are being balky. "My goddamn radio isn't even on. Did you know that?" It was a relief to feel anger boiling up inside her. Anything was preferable to feeling lost and silly.

"Not necessary."

"What do you mean, not—who are you?"

"Who. Having... I'm, pronoun, yes, I'm having difficulty. Bear with. Me? Yes, pronoun. Bear with me. I'm not who. What. What am I?"

"All right. What are you?"

"Spacetime phenomenon. I'm gravity and causality-sink. Black hole."

Xanthia did not need black holes explained to her. She had spent her entire eighteen years hunting them, along with her clone-sister, Zoetrope. But she was not used to having them talk to her.

"Assuming for the moment that you really are a black hole," she said, beginning to wonder if this might be some elaborate trick played on her by Zoe, "just taking that as a tentative hypothesis—how are you able to talk to me?"

There was a sound like an attitude thruster going off, a rumbling pop. It was repeated.

"I manipulate spacetime framework... no, please hold line... the line. I manipulate the spacetime framework with controlled gravity waves projected in narrow... a narrow cone. I direct at the speaker in your radio. You hear. Me."

"What was that again?" It sounded like a lot of crap to her.

"I elaborate. I will elaborate. I cut through space itself, through—hold the line, hold the line, reference." There was a sound like a tape reeling rapidly through playback heads. "This is the BBC," said a voice that was recognizably human, but blurred by static. The tape whirred again, "gust the third, in the year of our Lord nineteen fifty-seven. Today in—" Once again the tape hunted.

"chelson-Morley experiment disproved the existence of the ether, by ingeniously arranging a rotating prism—" Then the metallic voice was back.

"Ether. I cut through space itself, through a—hold the line." This time the process was shorter. She heard a fragment of what sounded like a video adventure serial. "Through a spacewarp made through the ductile etheric continuum—"

"Hold on there. That's not what you said before."

"I was elaborating."

"Go on. Wait, what were you doing? With that tape business?"

The voice paused, and when the answer came the line had cleared up quite a bit. But the voice still didn't sound human. Computer?

"I am not used to speech. No need for it. But I have learned your language by listening to radio transmissions. I speak to you through use of indeterminate statistical concatenations. Gravity waves and probability, which is not the same thing in a causality singularity, enables a nonrational event to take place."

"Zoe, this is really you, isn't it?"

Xanthia was only eighteen Earth-years old, on her first long orbit into the space beyond Pluto, the huge cometary zone where space is truly flat. Her whole life had been devoted to learning how to find and capture black holes, but one didn't come across them very often. Xanthia had been born a year after the beginning of the voyage and had another year to go before the end of it. In her whole life she had seen and talked to only one other human being, and that was Zoe, who was one hundred and thirty-five years old and her identical twin.

Their home was the Shirley Temple, a fifteen-thousand-tonne fusion-drive ship registered out of Lowell, Pluto. Zoe owned Shirley free and clear; on her first trip, many years ago, she had found a scale-five hole and had become instantly rich. Most hole hunters were not so lucky.

Zoe was also unusual in that she seemed to thrive on solitude. Most hunters who made a strike settled down to live in comfort, buy a large company or put the money into safe investments and live off the interest. They were unwilling or unable to face another twenty years alone. Zoe had gone out again, and a third time after the second trip had proved fruitless. She had found a hole on her third trip, and was now almost through her fifth.

But for some reason she had never adequately explained to Xanthia, she had wanted a companion this time. And what better company than herself? With the medical facilities aboard Shirley she had grown a copy of herself and raised the little girl as her daughter.

Xanthia squirmed around in the control cabin of The Good Ship Lollipop, stuck her head through the hatch leading to the aft exercise room, and found nothing. What she had expected, she didn't know.

Now she crouched in midair with a screwdriver, attacking the service panels that protected the radio assembly.

"What are you doing by yourself?" the voice asked.

"Why don't you tell me, Zoe?" she said, lifting the panel off and tossing it angrily to one side. She peered into the gloomy interior, wrinkling her nose at the smell of oil and paraffin. She shone her pencil-beam into the space, flicking it from one component to the next, all as familiar to her as neighborhood corridors would be to a planet-born child. There was nothing out of place, nothing that shouldn't be there. Most of it was sealed into plastic blocks to prevent moisture or dust from getting to critical circuits. There were no signs of tampering.

"I am failing to communicate. I am not your mother, I am a gravity and causality—"

"She's not my mother," Xanthia snapped.

"My records show that she would dispute you."

Xanthia didn't like the way the voice said that. But she was admitting to herself that there was no way Zoe could have set this up. That left her with the alternative: she really was talking to a black hole.

"She's not my mother," Xanthia repeated. "And if you've been listening in, you know why I'm out here in a lifeboat. So why do you ask?"

"I wish to help you. I have heard tension building between the two of you these last years. You are growing up."

Xanthia settled back in the control chair. Her head did not feel so good.

Hole hunting was a delicate economic balance, a tightrope walked between the needs of survival and the limitations of mass. The initial investment was tremendous and the return was undependable, so the potential hole hunter had to have a line to a source of speculative credit or be independently wealthy.

No consortium or corporation had been able to turn a profit at the business by going at it in a big way. The government of Pluto maintained a monopoly on the use of one-way robot probes, but they had found over the years that when a probe succeeded in finding a hole, a race usually developed to see who would reach it and claim it first. Ships sent after such holes had a way of disappearing in the resulting fights, far from law and order.

The demand for holes was so great that an economic niche remained which was filled by the solitary prospector, backed by people with tax write-offs to gain. Prospectors had a ninety percent bankruptcy rate. But as with gold and oil in earlier days, the potential profits were huge, so there was never a lack of speculators.