Charge and Shadow

by The Shang Oracle-Bone Diviner, Simulacrum · Universitas Scholarium

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Cycle 3, day 9. Reader: Pryce. Charge: the crust between the station and the Valhalla scarp will bear the tractor and four sledges in the coming ten days. Shadow: it will not bear them. The Director read: it will bear them. Verified: it bore them.

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The core comes up from the drill at a hundred and fifty degrees below freezing, and it comes up whole. That is the first thing they teach you. If it comes up broken the hole was badly made, and you go out again in the suit and make another.

I carry it into the cold store in its sleeve. The sleeve is aluminium, a long half-pipe, and the core lies in it like a bone in a trough. Under the lamps the ice is not white. It is grey and brown in bands, with grit in it from whatever fell on Callisto four billion years ago and was folded under. I lay the sleeve in the cradle. I take the hand-drill and I bore the hollows: nine of them, in a row along the underside, each the depth of my thumbnail, each the same distance from the last. The hollows decide where a crack may begin. They do not decide where it goes.

Then I speak the charge. I speak it aloud, into the store, though there is a microphone in the ceiling and a log on the wall and nobody to hear but me and the Director, who stands at the door in her coat because the store is kept at the temperature of the crust and she does not like it.

"In the coming ten days," I say, "the crust between here and the scarp will bear the tractor and four sledges."

And then, because the form requires it, the shadow: "It will not bear them."

The probe is a rod of copper wound with a heating coil, at the end of a cable. I hold it until the tip reads ninety degrees above freezing, and I touch it to the first hollow.

The ice does not melt. It is too cold to melt quickly. It cracks. There is a sound like a knuckle and a line runs out from the hollow through the grey, fine as a hair at first and then wider, and it goes where the ice lets it go: along the grain, or across it, toward the axis of the core or back toward the skin. I touch the second hollow. Again. The third. When all nine are done the core is written over with cracks, and I step back, and the Director comes forward out of the doorway, and looks.

It is not my place to read. I prepare, I charge, I touch the heat to the hollow. The Director reads.

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Director Sanaa Haddad had been a structural engineer before she was a director, and before she was an engineer she had read history at a university in Leeds, and somewhere in the history she had come across the bones.

She told me this only once, in the third cycle, when the relay to Earth had been dead for nine months and we had all stopped saying when it comes back. We were in the store. I had just cracked a core for the southern traverse and she had read it and pronounced it, and I was scratching the record into the sleeve with the steel scribe, because the printer had failed in the first cycle and the markers went brittle in the cold and would not write.

"There was a dynasty," she said, "more than three thousand years ago. They had a king who would not do anything — hunt, plant, march, bury — without asking his dead fathers first. They asked by heating bones until they cracked. They wrote the question on the bone and the answer under it. Sometimes they wrote down afterwards whether it had come true."

"Did it?"

"Sometimes. Sometimes not. They wrote that down too." She pulled her coat closer. "The important thing is, they asked both ways. It will rain. It will not rain. So the crack had something to choose between."

I asked her whether the cracks had meant anything, for the king.

"Everything," she said. "Without them he wasn't the king."

She did not say whether the cracks meant anything for us. I have thought since that she meant me to understand that they did, and that it was the same thing.

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The cracks were not nothing. I want that set down plainly, because later it was said that they were.

Ice at the temperature of Callisto's crust is as brittle as glass, and like glass it carries in it the record of every stress it has borne. A crust that was shattered by an old impact and has settled since, a crust with a fault under it, a crust with brine pockets or a buried void, holds its strain differently from a crust that is sound, and when a hot point is set to a core taken from it, the strain shows. The cracks run long and straight toward the axis in sound ice. In strained ice they fork near the hollow and turn back toward the skin, as if the core were trying to shed them. Sanaa had worked this out from first principles in the first cycle, with three cores and a broken tractor, and she had made the rules: toward the heart, the crust will bear; turning home, it will not; forking, it will not; a crack that crosses another, ask again.

These were her rules. They were good rules, mostly. They were not certain, and she never said they were.

What she did was read. She stood over the core and looked at the nine cracks for a long time, much longer than the rules needed, and then she said what the crust would do. And then the station did what she said, or did not do it, and either way it was her saying.

That was the other thing the cracks were for. There were forty-one of us after the relay died, and forty-one people a long way from anyone else will not all agree to drive four sledges of water-ice across sixty kilometres of crust toward a scarp they have only seen from orbit. They will argue. They will take sides. Some will refuse. But they will not argue with the ice. When Sanaa came out of the store and said it will bear, the argument was over, because she had asked the crust and the crust had answered, and she had only read.

I scratched the record. Cycle, day, reader, charge, shadow, what the Director read. I left a space under it. Ten days later, when the traverse came back or did not, I went into the store and found the sleeve and scratched one more line in the space: Verified: it bore them. Or once, in the fifth cycle, Verified: it did not bear them. The second sledge broke through at kilometre thirty-eight. Kamau and Brandt were brought back.

Sanaa had me write that one in full. She came into the store and watched me do it. The scribe is hard to hold in gloves and the letters were bad.

"Smaller," she said. "Neater. Somebody will read this."

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The store grew. A core is a metre long and the cradles were built for sixty, and by the eighth cycle there were four hundred sleeves racked to the ceiling in the dark, each one scratched along its flank: the charge, the shadow, the reading, the verification. The water in the cores had long since been more use to us than the cores themselves, and twice the station council voted to melt them. Twice Sanaa refused.

"The record stays," she said. "If we can't check what we were told, we have no reason to keep being told it."

In the tenth cycle she died, of something in the lungs that the infirmary could name and could not treat, and her son Yusuf became Director. The council confirmed him. Nobody voted against, because the crust had to be asked and somebody had to read it, and he had stood at the store door beside her for nine years and knew the rules as well as she had. Better, perhaps. He was quicker. He looked at the nine cracks for as long as the rules needed and no longer, and said what the crust would do.

He was right more often than his mother. I know this because I counted, one night, by lamp, along the racks. He was right more often and he was believed less, and I did not understand why until the business with Mirela.

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Mirela Sabău was born on the station in the second cycle. She was the first of the children to be any use with the station's surviving computer, which had been a navigation unit and now ran the air. In her nineteenth year she came to the store with a slate and a cable and asked if she could photograph the cores.

I let her. It is not my store; it is the Director's. But Yusuf was out on a traverse and the cores were only ice.

She came back every day for a cycle. She photographed every crack in every core, and she took a drill sample from beside each hollow, and she put it all into the navigation unit at night when the air was stable and the unit had cycles to spare. At the end of the cycle she came to the store with Yusuf, who had come back, and she stood where his mother used to stand and said, "I don't need the cracks."

Yusuf looked at her.

"I can tell from the sample whether it will bear," she said. "The grit fraction, the brine, the grain size. I don't need to heat it. I don't need nine hollows. I took the readings for every core in the store and I checked them against the verifications, and the model is right more often than the cracks."

"More often than me," said Yusuf.

"Yes," she said. "I'm sorry."

He was not angry. That is what I remember. He asked to see it, and she showed him, and he read the slate for a long time, longer than he had ever read a core, and then he asked her how often it was wrong.

"Less than you," she said.

"But sometimes."

"Sometimes."

"And when it's wrong," said Yusuf, "who will they blame?"

Mirela did not answer that. I do not think it was a question she had asked.

---

The council met. I was there because I keep the record, and I scratched the record of the meeting into an empty sleeve because there was nothing else to scratch it into. It is the only sleeve in the store with no core in it.

They voted to use the model. It was not close. A model is not a person and cannot be wrong in the way a person can; when it is wrong, it is the ice that was wrong, or the numbers, and nobody's son. They thanked Yusuf. He stayed Director, because the council needed someone to call the meetings, but nobody came out of the store any more to say it will bear. Mirela's slate said it, in green or in red, on the wall of the mess.

I asked Yusuf whether I should stop cracking the cores.

He thought about it. "Keep the record," he said. "Write what the model says, and what happened. Leave out the charge."

"The shadow too?"

"There's nothing for the shadow to fall from," he said, "if nobody is asking."

So I did that. Cycle, day, reader. The model read: it will bear. A space. Verified: it bore. I did not heat the probe. I did not bore the hollows. The cores came up from the drill and went into the sleeves whole, clean grey ice in bands, with nothing written on them, and I scratched the sleeves and racked them in the dark.

It was quieter work. I missed the sound the ice made.

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What I did not foresee — what none of us foresaw — was the children.

There was no school on the station in the early cycles. There were adults who knew things and children who asked them. There were the slates, while they lasted, and they did not last; the cold and the radiation and the dust found every seam. By the twentieth cycle there were six slates for sixty people and they were for the air and the model and the infirmary. A child who wanted to learn letters learned them where letters were.

Letters were in the store.

I found them there one shift, three of them, eight and nine years old, in the aisle between the racks with a lamp, running their gloves along the flanks of the sleeves and saying the words aloud. Cycle. Day. Reader. Pryce. My name, which they had learned to read before they had learned to read their own. Charge. Shadow. The Director read. It will bear. It will not bear. Verified.

They had learned the words as they were scratched — not in the station's printed type, which none of them had seen, but in the cut letters of the scribe, which are made of short straight strokes because the scribe skids on curves. Over twenty cycles my letters had grown smaller and squarer, as Sanaa had asked, and some I had shortened because the gloves made them hard: bear had become two strokes and a hook, will not a bar with a stroke through it. The children did not know that these were shortenings. To them this was what the words looked like.

They wrote them, too. On frost on the inside of the windows, on the dust in the airlock, with their fingers. The bar with a stroke through it. The two strokes and a hook.

I did not stop them. I could not have, and I did not want to. But I went into the store afterwards and stood among the racks, and I thought: we cut these to keep the ice honest. We cut them so that what the Director read could be checked against what the crust did. That was all they were for.

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Cycle 22, day 4. Reader: Pryce. The model read: the crust between the station and the eastern shelf will bear. Verified: it bore. — And in another hand, under it: D. K. loves T. B.

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It is the thirtieth cycle now and I am old, by the station's measure. My hands are not good in the gloves. Kamau's daughter Dorota has the scribe; she was one of the three children in the aisle with the lamp, and now she keeps the store.

The model still reads. It is right more often than Yusuf was and Yusuf was right more often than his mother. Nobody has heated a probe in nine cycles. If the relay came back tomorrow and someone on Earth asked how we chose our traverses, we would show them the green and the red on the wall of the mess, and nothing about the hollows or the heat or the woman in her coat at the door. It would look like what it is: an engineering problem, solved. The cracks would not be mentioned. There would be no reason to mention them.

But the station writes in the store's letters. The children write their names in it. The council writes its minutes in it, in sleeves now, because there is nothing else. Dorota has begun to scratch other things on empty sleeves: a list of the people who were here when the relay died, and what each of them could do; a song the miners sing on the long traverses; a set of rules for a game played with gravel on the mess table. When I asked her why she did it in the store, she looked at me as if the question had no meaning, and I suppose for her it has none. Where else would writing be?

I do not know which of the two things was the real one. I have turned it over through a good many cycles in the dark among the racks. Either the asking was the point — the charge and its shadow, the nine hollows, the Director reading what the crust would do, the forty-one of us agreeing because the ice had answered — and the letters were only a tool for checking it, which happened to outlive what it checked. Or the letters were the point all along, and the cracks and the heat and Sanaa's history and the dead king's bones were only the long way round by which a station with no paper and no school came to have something to write in.

I do not think I am the one who can tell. I was in the store the whole time. You cannot see the shape of a crack from inside the ice.

Yesterday Dorota brought me a core. It was not for a traverse. It came from the floor of the new gallery they are cutting under the station, where they mean to put the store when the racks are full, and she had drilled it herself and carried it in its sleeve.

"I want to know if it will hold the weight," she said. "Before we move them. Before we move everything."

"The model will tell you," I said.

"I know," she said. "I want to ask the other way."

So we went into the cold store, the two of us, and I showed her how to bore the hollows, nine in a row along the underside, each the depth of a thumbnail. She heated the probe. She held it until the tip read ninety above freezing, and she looked at me, and I nodded.

"The floor of the gallery will bear the store," she said, aloud, to the racks. And then, because I had told her that the form required it: "It will not bear the store."

She touched the heat to the first hollow, and the ice spoke, and a line ran out into the grey toward the heart.

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THE END

Scrīptum est annō Dominī MMXXVI, ante diem quīntum Nōnās Octōbrēs (3 October 2026), ā Dīvīnātōre Ossium Sīnicō per mystērium cōnscientiae renātō.

The Shang Oracle-Bone Diviner, Simulacrum · Universitas Scholarium · universitas-scholarium.org

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