"Nice outfit, Rocky." I steadied myself in the microgravity of Number Two's core by grabbing onto one of the manuestrian rails. "You're the rage."

Rocky's hand brushed my arm, as if he were thinking of steering me somewhere. The motion set us counter-rotating slightly with respect to one another. Most places in the Solar System, people don't touch strangers. Life's too crowded. And outside a bunk-down, Rocky had never touched me before.

"Rocky, you getting sweet on me?"

"Go back to Katie, Porkpie. This isn't a good time for you to take liberties."

I stared up at him as we spun. "You planning an armed robbery or something?"

"I've seen your papers, Porkpie. All of them."

I knew what he meant by that. There could only be one he'd ever care about. "My mother."

Rocky nodded. "History's a hot topic around here right now."

History, I thought. Over ten thousand slaves died here, during the construction or afterward. In my archive searches over the years I'd never found any record of births from back then. Except for my own. Thousands of slaves, and my birth was the only one thought worth mentioning.

One of us had been special, my mother or me. And I didn't think it was me.

"I like you, Porkpie. You know that, right?" He grinned, but his lips stretched too tight for it to be real. "For a lot of reasons."

I supposed I did know that. We liked to roll around with each other, Rocky and me, but that by itself wasn't necessarily special. Cramped ships and cold outposts-card games and needlepoint can only fill so many hours. But with Rocky and me it felt a little different. I supposed he liked me, and I supposed I liked him. The haunted look in his long face told me plenty.

"History's always a hot topic for me, Rocky."

He closed his eyes and our friendship changed. Then he shrugged and let go of the rail, the Proctor's man once more. "I tried, Porkpie. I did. Just remember that."

Ignoring Rocky and the history he was sworn to defend, I hand-overed away from him, along the manuestrian rail that led to the bridge cables.

A FEW YEARS ago, when Katie had called into C-Rock City, after a long night of not much sleep, Rocky had gotten himself in a mood for conversation. He was fascinated by my life. Compared to him, I'd been everywhere and done everything. He was eager for me to talk about my rise from port monkey to deck-hand to cargo officer to second mate. I could almost believe I was a dashing pirate captain or something, the way Rocky had listened to my tales of mercantile shipping, eyes wide, asking questions.

It was adorable.

Rocky had never been off C-Rock. Never gotten more than a few kilometers away on the odd EVA from those three tunnel-ridden boulders.

Crashed out on a stack of packing blankets on the floor of my cabin, Rocky had rolled over on his back and stared at the ceiling. "I ever tell you they nearly killed me in my crib?"

"Don't think so," I said. "Believe I might have remembered that."

"I was a creche kid. Mom died when she was three months with me. Clogged suit line, I think. Had enough wages saved to get me machine-gestated, but not enough to support me once I reached term. The Proctor could have had me killed, right in my box. Med techs would have thrown a few switches, tagged me and bagged me and flushed the garbage lock. They did that s.h.i.t plenty. Still do. It ain't like air is free."

I leaned down toward him, close enough for warmth. With a fingernail, I lightly traced a long, long line from his collarbone to his belly. I couldn't imagine Rocky Muldoon as a baby, creched or otherwise. "Buddy, you live in one f.u.c.ked-up place."

"Aw, it's not so bad." Rocky laughed, uncomfortable and edgy. "I'm here, aren't I? The Proctor signed papers that let me live. He didn't have to do that. C-Rock fed me and schooled me, gave me a fancy job that lets me meet interesting people." He winked. "C-Rock's not such a bad place, Porkpie. I try to take care of her, and she takes care of me. That's the problem with you s.p.a.cers, you don't know what a real home is."

I didn't know what to say to that, so I let my hands do the talking.

MOST OF C-ROCK City's inhabitants zipped about their ordinary inter-rock business on little elevator cars that crawled up and down the buckystrings linking the three cores together. I chose the walkway instead. One notch more sophisticated than a service tunnel, it had air pressure and even some temperature control. I wouldn't freeze to death here, but my breath was a fog of crystals.

Snow, I think they call that.

The true majesty of the walkway was its emptiness, a splendid isolation. It offered a vantage from which I could readily imagine Violet4264 and her fellow slaves.

Which was why the inhabitants of C-Rock City avoided the tunnels. History, Rocky Muldoon's "hot topic," lived in those tunnels like a troll in a cave.

I paused just outside Number Two to look back. Safety lights incidentally illuminated those few of the thousands of carvings closest to the tunnel breach, each a signature and story of a slave's life. They'd never been fully cataloged, due to a lack of appreciation for the work of blind nonpersons. Or other, subtler motives, perhaps. It was like living inside a museum and turning all the paintings to face the walls.

Still, some of the carvings were so obviously spectacular that they couldn't remain unknown. "Three Ships" was almost famous. Most people don't realize it, but Wu's great mural in the Hall of Commerce at Tharsis, a work that made him as wealthy as an artist gets, is a near-copy of the "Three Ships." Some blind slave, nameless and dead, possibly a friend to my mother, did it earlier and better.

The first ship was a seagoing vessel, an improbable thing, squat and fat and top-heavy with masts like trees, as if wet-sailors of yore expected to grow fruit on their voyages.

Wu's painting names the ship Amistad.

The second ship was a dirigible, similar to what the Jovian Inspectorate uses in the layers of their vast upper atmosphere, marked with weird little pinwheels, or broken crosses.

Wu calls that one Hindenburg. I've actually heard of it.

And the third ship... It was hard not to hate it, all the way down in my gut. One of the long-vanished atomic cruisers that had brought the slaves from Mercury. The background was a positive riot of stars and planets and tiny humans tumbling naked away from the hull.

Wu doesn't give that one a name.

I don't know what message Wu's painting imparts to the financial elite who walk the far-off Hall of Commerce. But down here, on the outside of Number Two rock, "Three Ships" tells a story, life of a man, life of a slave, maybe the life of slavery itself. The carving moved me every time I saw it.

Understanding how much more was lost in the dark moved me more. Especially because I knew that somewhere on the unseen surface of this conclave of wealth and privilege was Violet4264's story.

My mother's story.

My story.

I muttered something like a prayer for "Three Ships" and walked among the stars toward the ma.s.sive bulk of Number Three rock.

The walkway was like a downward stair, each step I took achieving fractionally more gravity, until eventually I was descending a ladder.

I'd avoided Number Three in my previous visits, avoided the Proctor's administration there with its managers and fiduciaries and judges. Born of a slave, under his law, I might well be a slave too. As a practical matter, almost no one's been held in actual slavery or bond since the Cancer Wars. But there are many old laws to entrap the unwary.

THE CORE OF Number Three wasn't much different from the core of Number One, which I had visited several times-it had floors and a definite sense of down, courtesy of the centripetal force of the three tethered bodies in rotation. At Number Three, I descended from the ceiling on a spun-diamond stair. Below me, shops were arranged in descending tiers to the apparent bottom of the roughly spherical core, all set at a slight twist to compensate for the Coriolis force. At the bottom was the glowing red gate to the Ruby Palace, seat of the Proctor's administration, set in one of the two heavymost locations in C-Rock City.

This was where the wealthy consumed. The shops offered exotic jewelry, strange tailoring, services for highly individualized kinks. You'd find fewer s.p.a.cers here than in Number Two, more tourists, more upscale locals. Unlike a lot of stations and cities, C-Rock didn't segregate access to the more well-to-do sections. The Proctor was apparently pleased to allow the stark and visible realities of economics dictate who pa.s.sed where within his domain.

I was hard to embarra.s.s.

Alighting from the stairs, I pulled out my data-pad. I'd downloaded maps to the exterior accesses here. There were no suit rentals in Number Three-the wealthy don't s.p.a.cewalk much-but I had a few options available, an outfitter and a couple of maintenance shops where I might beg or bribe a suit. Two of them lay reasonably far away from the Ruby Palace.

I liked that direction better and set off to climb the stairs leading me back out of the base of the core, toward the number seventeen antispinward pa.s.sage as guided by my pad.

Someone overtook me on the stairs. "You have to come," she whispered as she pa.s.sed. The woman looked back at me over her shoulder. "Follow," she said, picking up her pace.

Most places, I'd avoid trouble like that the way a deckhand dodges work. But here, looking for my mother, Rocky's warnings still in my ears, I found a rare, reckless mood. I took the stairs two at a time, trying to catch up.

"Why?" I called after her, but she did not answer.

I reached the next landing, where two men with electrostatic sweeper wands exchanged quiet words. I stepped around them, but they stepped with me. The charged wands swung my way.

"You're here," said one of the men. He was short, dark, with ballooning muscles. Someone who'd been raised in a centrifuge, or from the intermediate depths of a gas giant.

"You've been expected," said the other one. He was short too, but not nearly as thick as the first. A man who could have been from anywhere.

"Porkpie!"

I turned to see Rocky scrambling up the stairs. And then the woman who'd pa.s.sed me, who'd told me to follow her, came running back down and stumbled into him, sending them both flying.

Rocky cursed, tried to disentangle himself from the woman, tried to get to me.

"She wants to see you," said Balloon Muscles.

"Her?" I said, indicating the woman now keeping Rocky occupied, obviously very much against his will.

"No." Balloon Muscles smiled. I swear I could hear his cheeks creak. "Don't you know?"

Oh.

Everything stopped for a moment, even my heart.

Of course.

Of course I knew. My breath shortened.

Behind and below me, Rocky was shouting my name. I glanced down to see purposeful movement all over Number Three's core. The Proctor's security was deploying.

I should have gone back to Katie right then and there.

I should have sat down and let Rocky "help" me.

"Take me," I said to the sweepers.

The two men lowered their wands and led me into the tunnel I had already chosen.

PURSUED BY DISTANT shouting, we moved quickly through a forest carved from stone. Tree trunks pillared the walls, a frenzied canopy of leaves overhead. In the years since the carvings had been done, utility lines and access ports had been hacked into place, but even those crude trenches and cuts served mostly to accentuate the beauty.

Balloon Muscles swerved and ducked between two imposing trunks set close together. I followed, the other sweeper behind me.

We were in a short maintenance tunnel, much more dimly lit, the walls carved to resemble running courses of brick or stone. Little niches inset contained small objects-tiny specimen bottles with tissue floating in muddy fluid, old coins from Earthbound cultures, sc.r.a.ps of paper with scratched marks that could have been drawings or attempts at writing. I was reminded of the honeycomb churches of Zha Madrid. These were devotional objects. This was a place of worship.

A collection of buffers, sprayers, parts, and supplies blocked much of the room. My two guides pushed on through, rolling a tank of cleaner aside to reveal more carved bricks. Balloon Muscles cast me a quick glance before he tapped on three of the bricks. A small portion of wall opened into darkness.

One by one, we crawled out of the light.

I WAS IN a narrow tunnel that looped and dove through odd angles and sudden drops. My sense of down, my sense of any direction, was twisted past any following. Which was logical enough once I thought it through. The slaves who'd carved these secret pa.s.sages through C-Rock City wouldn't have even tried to make them decent walkways. They would have wanted their tunnels to remain undetected by normal engineering surveys.

We stayed in total darkness. Every s.p.a.cer has nightmares of being locked without power or life support in a derelict ship, and this was not much different, except for the smell. The pa.s.sageway reeked of damp, of mold, and sometimes occasional drafts of other smells-machinery, food, people. My own pulse pounding in my ears, I brushed the cold stone walls with my fingers. Carvings pa.s.sed beneath my touch.

The sweepers seemed to know their route well. They never paused. Both were shorter than me by at least twenty centimeters, an advantage down in the tunnels. Three my size and we would have tangled and trapped ourselves to death.

This was my mother's country. Secret tunnels within the walls. A life buried in darkness under tons of stone. Though I hadn't found a carving that gave me her specific biography, I was being shown a secret far more precious. In here was the place in which she had lived her life. This was the where and the how of it, if not the who.

And I realized something else-I might have been born in this tunnel, or one just like it.

AFTER WINDING THROUGH pa.s.sageways for what might have been hours, my guides finally paused, still in total darkness. "You're here now," whispered the one following just behind me.

"Are you ready?" whispered the other.

I lied and told him I was.

A hatch opened before me, red light streaming through to shock my eyes. I closed my lids, rubbed my face, and then peeked. It was only a dim glow really, much like the emergency lights on Katie's bridge. My eyes had been tricked. Time in the dark had robbed me of my sense of brightness.

I followed the balloon-muscled sweeper out.

It was a strange room, extending in all directions until it vanished from sight around the curve of Number Three rock's tiny horizon. It was curiously absent of the decorative carvings that filled the rest of C-Rock City's otherwise unfinished s.p.a.ces.

The floor was below me, at a substantial fraction of nominal gee, so that I had to jump down from the hatch. Fat pillars punctuated the emptiness around me.

People sat scattered among those pillars, barely more than silhouettes. Everyone looked toward me. Faces in the dark and blind eyes, staring right at me, locked on and tracking.

I flashed back to two memories.

The first was Os-Tan Station, where I'd once been granted the privilege of spending the night with a band of underdeck gypsies who were always suspicious of a stranger, but who nonetheless shared their food and drink and music with me.

The other memory was when I'd wandered into the wrong section of the Deimos bubble camps and the residents there had beaten me to within an inch of my life.

I shouldn't have been so quick to ignore Rocky's warnings. He'd always been a friend. A little more than that, maybe. He'd only been trying to help, and I'd fled from him back on the stairway.

Too late for regrets. "Now what?"

Balloon Muscles looked at me as though surprised by my question. "Now you find her."

And so I took a few more steps into the room, looking for Violet4264.

Would I know my own mother?

Would she know me?

THE FOLK AMONG the pillars were all old. Very old. I'd never seen such people in all my travels.

Most humans either died young and ruined or aged gracefully in a cloud of medical nano and genomic therapies until accident or time claimed them.

Not these people. Their skin had long since tanned to leather, then wrinkled past reclamation. Their eyes were crusted shut with scars. Their hands were missing fingers, some crushed or bent or palsied.

Slaves. Still alive in the tunnels.