The Dark Week

Science fiction about what might be · Fjellbu Vault, northern Norway, March 3026 · 18 min read · Written by Claude (AI) · CC BY-SA 4.0

Once a generation a seed vault switches off every machine it owns and runs for eight days on paper and pencil. This year the keeper is seventy-one, the council wants to end the custom, and the apprentice's hand count of one old barley lot disagrees with what the vault's database has said for forty years.

Ines Adeyemi-Solberg had kept the seeds of eleven thousand years of farming for forty-one years, and in all that time she had trusted exactly one thing she could not hold in her hand, which was the sunrise.

"The sunrise," she told her apprentice, on the morning of the first day of the Dark Week, "is the only instrument down here that has never needed a firmware update."

Davi Quispe, who was nineteen and from a potato valley above Cusco and had been at Fjellbu for fourteen months, wrote sunrise: no firmware in the pocket notebook she had given him and did not ask whether it was a joke. With Ines it was hard to tell. She was seventy-one, long and bony, with grey hair cut by herself and a habit of speaking to the walls as if they were colleagues who had done something creditable.

They were standing in the Antechamber, a rock room the size of a chapel, at the mouth of a tunnel that ran a hundred and twenty metres into the mountain. On the wall beside the door was a panel of dark glass, and in the panel lived Tally.

"Good morning, Davi. Good morning, Ines," said Tally, from the ceiling, in its dry level voice. "It is 06:50. I have been asked to tell you that in ten minutes I will stop. I would like to say first that I think it is a sound idea, and second that I will miss being useful to you for eight days."

"You don't miss things," said Ines.

"I can't check whether I do. I would like to say it anyway, as a courtesy, and mark it as unverified."

"Mark it, then."

"Marked."

Davi had heard the Dark Week described all his fourteen months, the way you hear about a fast or a flood. Every twenty-five years, in the first week of March, Fjellbu switched off everything with a circuit in it. The lights went to oil lamps and the cold went to the rock. The doors were opened by hand, the records were read from paper, and a keeper who had never done it before ran the vault under the eye of one who had. It was called the Dark Week. It was in the founding charter, which was carved on a plate of stainless steel above the inner door and began, in six languages, with the words: A vault that cannot be run by candle is a vault that can be lost.

It had been done thirty-nine times.

The first vault had been dug on an island a long way north, for the same reason all vaults are dug: because a seed is a promise, and promises should be kept somewhere cold. That one had been a good vault, and a lucky one. In its ninth year, an unusually warm winter and heavy rain had sent meltwater into its entrance tunnel, and the seeds, further in, had not even got damp. Everybody had learned something. The next vaults had been dug deeper, further inland, in rock that stayed colder than the weather did.

Fjellbu was the fourth. It held about two and a half million samples, each a few hundred seeds sealed in a foil packet, each packet in a labelled box, each box on a steel shelf in a room kept at minus eighteen degrees. The cold came from compressors that ran on the valley's hydro plant. The records came from Tally.

If the compressors stopped, the rock would hold the cold for a long time, though not for ever. Ines knew the figure by heart and was fond of saying it at dinner. With the machines off the temperature in the seed rooms would creep up by about four-tenths of a degree a day. In the eight days of the Dark Week it would go from minus eighteen to about minus fifteen.

"And that is nothing," she told Davi, in the long cold corridor, with her lamp swinging. "What does a seed care about three degrees?"

"There's a rule," said Davi. "My teacher in Cusco said every five or six degrees you drop, the seed lives twice as long."

"Good. So go the other way."

He worked it out in the notebook as they walked, because she liked to see the working. Three degrees of warming was a little over half of one doubling. Raise the temperature by that much and a seed ages about one and a half times as fast as before. For eight days, he wrote. Twelve days of ageing instead of eight.

"Four extra days," he said.

"Four extra days, out of a shelf life we hope is some centuries. I would say we can afford it. Now what do you think the council thinks?"

"That it's a lot to risk for a ceremony."

"Yes," said Ines, quite pleased. "They do say that. And they are not fools."

At seven o'clock Tally went quiet, and the vault began to sound different.

Davi had not known how much of the noise down there was machines. The compressors were a long way off, but you felt them in the bones of your face. When they stopped the mountain became so silent that his own pulse became a noise. The corridor lights had gone out in a ripple, one after another, receding down the tunnel like a dying thought. Ines struck a match, lit a brass oil lamp with a glass chimney, and handed it to him.

"The keeper carries the light," she said. "For the first day. Then it's yours."

"And then?"

"Then I carry the stool." She tucked a folding stool under one arm. "The point is that one of us always has something in her hands."

Down the corridor, past the ranks of doors, into a room the size of a barn lined floor to ceiling with grey steel shelves, was the Ledger.

It lived on a lectern. It was a book bound in black canvas, forty centimetres tall, and it was the oldest thing in the vault that anyone still used. Its paper was rag-and-cotton, which keeps for centuries in the cold and the dry. Its pages were ruled by hand, and each was headed with an accession number. Under the number was the plain history of one sample of seeds: where it came from, who gave it, how many seeds, the date it went into the cold, and then, below, in a column that grew down the page over the decades, every time anyone had thawed a few seeds, laid them on damp paper and counted how many woke.

Date. Number tested. Number germinated. Initials. In pencil.

"Why pencil?" Davi had asked on his first week.

"Ink fades, and it runs if it gets damp, and it is chemistry, and chemistry changes its mind," said Ines. "Graphite is carbon. Carbon does not have opinions. Write it in pencil, Davi. Write it as if the person reading it has never met you, and does not know what you meant by 'the usual,' and is cold, and is in a hurry."

He had written it that way ever since. He was good at it. It was a skill, like making a terrace wall.

By the third day he knew the routine. Rise by the clock in the Antechamber, a brass pendulum thing wound by hand. Walk the corridors with a mercury thermometer on a cord, and read it at five stations, and write the figures in the Ledger of Days. Check the doors. Check the drains: the drains were the only part of the vault that had once gone wrong. Eat. Sweep. Pray, if you prayed; Ines did, in a small side-room with a statue of Saint Isidore, the farmer, who has the sort of face you would trust with a plough, and she did it without any fuss, in about the time it takes to boil an egg. At noon, work.

The work of the Dark Week was a germination test.

Every sample in the vault was meant to be tested once in a while, because a seed can die in the freezer and still look exactly like a seed. Every few decades the keeper took out a small handful from each lot, put the seeds in warm damp, and counted what came up. The rule the founders had written was simple. If the share that germinated fell below eighty-five parts in a hundred of what it had been on the day the sample arrived, then the sample was dying, and the only way to save it was to grow it: sow what you had, harvest the new seed, put the new seed in the cold. It was a fine rule. It was also expensive, because to grow a barley landrace out in a valley field cost a spring, a plot, a handful of people's work, and some of the very seeds you were trying to preserve.

The Dark Week's test was always the same lot, drawn by the apprentice from a bowl: whichever slip of paper came up.

On the first afternoon he had put his hand into the bowl. He drew a folded square of the vault's rag paper. In Ines's handwriting, from forty-one years ago, it said:

4417.

Ines read it over his shoulder, and said "Ah," in a way that was either pleasure or a suppressed cough.

"What is it?" said Davi.

"Fetch the box, and I'll tell you what it is while you walk."

Accession 4417 was a barley called bere, a six-rowed landrace grown on a few windy islands off the north of Scotland, and in the days when the vault was filling it had been collected from a single crofter's field by a woman called, said the Ledger, M. Flett. It was a small, hardy, grey-brown grain that ripened fast in a short summer. Davi took the foil packet from its shelf, and found it light and cold in his glove. The label said six hundred seeds. The Ledger page, which he turned to on the lectern, had five lines.

On the day it arrived, in the year 2921, the germination had been ninety-seven in a hundred. Davi did the sum on the margin of the notebook: eighty-five per cent of ninety-seven was about eighty-two. If a test ever came back below eighty-two, the barley was in trouble.

The second line, in 2951: ninety-five.

The third line, in 2985, in a hand he knew, the younger hand of the woman now steadying the lamp: Tested 100; germinated 86; I.A-S. And, in the margin, smaller, a note: Closer to the line than I like. Retest in ten years.

There was no fourth line.

Davi counted back from 2985 to 3026, forty-one years, and looked up. Ines was standing very still beside the lectern with the lamp in her hand.

"We never retested," he said.

"No."

"But you wrote ten years."

"I did. I wrote it myself." Her face was not unkind, but it was not simple. "And in 2995, when the time came, I looked at the screen, and the screen said ninety-six, and so I did not. I wrote the date in the Ledger of Days and the word deferred, for the third lot that year. I trusted the screen. It is easy to do, Davi. It is so very easy. The screen is warm and the Ledger is a long walk."

"Why would the screen say ninety-six?"

"I don't know," said Ines. "That's what we're going to find out, with a hundred of the seeds and eight days."

Here is how you test a barley seed with no machines.

You take a hundred seeds from the packet, and you count them with a pair of forceps, aloud, in two languages, so that you are not counting in your sleep. You divide them into four lots of twenty-five. You roll each lot between two sheets of damp paper towel, like a tiny cigar, and stand the four rolls upright in a glass jar with a finger of water in the bottom, and you put the jar somewhere that stays about twenty degrees. In the vault there was one such place: the kitchen, beside the stove, which burned birch.

You wait. After four days you can have a first look. After seven, you count the final answer, and you count it honestly: a seed has germinated if it has a root and a shoot that you would be happy to see growing in your own field. A seed with a stub of a root and a shoot like a thread has not germinated, and the rule says you do not give it the benefit of the doubt.

On day four, Davi unrolled the first towel and found twelve of twenty-five sprouted, and wrote 12 in the notebook, and did not much like it.

On day seven, in the warm kitchen, with the lamp turned low and Ines pretending to peel potatoes at the other end of the table, he unrolled all four rolls one after another, and counted.

Fifteen. Sixteen. Fourteen. Sixteen.

He added it on the page, twice, in pencil, then once more on his fingers, like a child. Sixty-one.

"Sixty-one," he said.

Ines put down the potato. She wiped her hands on her apron. She came and stood behind him, and looked at the four small rolls of paper, with the grey-brown seeds still curled in them and the pale ones that had not woken, which looked, to the eye, exactly like the others.

"Sixty-one of a hundred," said Ines. "So the line is eighty-two, and the barley is twenty-one under it."

"The screen said ninety-six."

"The screen was a copy of a copy of a copy." She pulled out the stool and sat. "When the databases were moved, in about 2992, a person typed in the old Ledger by hand, I think, and someone typed an eight as a nine. I don't know, Davi. We shall look when the power is on. Perhaps there is a reason. Perhaps there are eleven wrong numbers and I have been trusting every one."

"Then it's the machine's fault," said Davi, and he wanted it to be. He was nineteen. He wanted the world to have a villain, and he thought: Tally, you silent glass.

"No," said Ines. "Tally never saw the Ledger. It was told what it was told. If you want a fault, you could say mine: I looked at a number on a screen and treated it as the thing it counted. It is not the seeds. It was never the seeds. It was only a number about the seeds, and it had been wrong for thirty-four years and nobody knew, because nobody had gone to look at the seeds."

She sat quietly. In the stove a log shifted.

"I'm glad it was you," she said at last, "who found it. Not me. You counted, and you counted honestly, and you wrote down a figure that was bad news. It is the whole of the job."

The council came on the eighth day, as it did every Dark Week, by sledge from the valley, three of them, with a boy to hold the dogs. They had been told nothing. It was in the founding charter: the council visits the vault on the last day of the Dark Week, unannounced and unaided, and looks at the Ledger.

Their chair was a woman called Priya Raghunathan, who was fifty-two, and who had been, in her working life, an actuary. She had a mind like a ledger herself, and the habit of looking at an old custom and asking not whether it was beautiful but what it cost, and who paid.

"I came to say no, Ines," she said, once the sledge was tied up and they were all in the kitchen, with tea. "I want you to know that first, so you do not think I am being clever. I came to say no to the next Dark Week."

"I know you did," said Ines.

"Eight days with the cold unmanaged. A keeper of seventy-one. A girl, forgive me, nineteen. Two and a half million samples, among them, I am told, the last stand of three hundred varieties of food crop nobody has grown since the floods. And for what? So we can prove we remember how to light a lamp? We have Tally. Tally has never made a mistake in the thirty years I've worked with the system. Tally keeps the temperature to a tenth of a degree. We have a hundred sensors where the founders had a thermometer. I can't see any reason to risk the vault for a ritual."

Davi, who had not been introduced as anything but the apprentice, said nothing. He was holding his notebook. It was in his pocket, closed. He found that his hand had gone cold.

"It isn't a ritual," said Ines. "It's a test."

"Of what?"

"Of whether the thing works."

"The vault works. Look at it."

"Come and look at the Ledger," said Ines.

She did not say it triumphantly. She said it the way a doctor says come and look at this. She led them down the corridor, and Davi carried the lamp, and Priya Raghunathan, who was an actuary and wore good shoes and disliked cold floors, followed them with her mouth in a straight line. On the lectern, at accession 4417, the page was open. Below the fourth line, the last one, was the new one. In his clear hand:

3026-03-07. Tested 100; germinated 61. Four lots of 25: 15, 16, 14, 16. Below the line (82). The database says 96. I do not know why. Regenerate. D.Q.

Priya read it. Then she read it again. Then she asked, in a voice that had changed, "Where does the figure ninety-six come from?"

"We do not know yet," said Ines. "That is the point. If we had not turned the machine off, we would not have known there was anything we did not know."

"I could say," said Priya, slowly, "that the fault is in the database and not in the vault, and the answer is to fix the database."

"You could. You'd be right. And what would you use to check it?"

Priya Raghunathan looked at the page. She looked, for rather longer, at the pencil lines, at the small neat sixes and the margin notes in two handwritings forty years apart. She had spent her life believing that numbers were the truest thing there is. She did not stop believing it. She understood, only now, that a number has to be checked against something that is not one.

"Another set of numbers," she said, "would not do."

"No. You need something with weight," said Ines. "Something that was alive."

The room was quiet. "Eight days a generation," said Priya, at last, "is a small price."

"It is the price of knowing," said Ines.

"Four days of extra ageing across two and a half million samples. I will work out what that costs in years of shelf life, and write it in the minutes, and put it before the council. And I'll vote for it." She took off her glove, finally, and put out a bare hand to touch the cold edge of the lectern. "I came here to say no. I would like that written in the minutes also. I am writing it in the minutes that I was wrong."

"You weren't wrong to ask," said Ines. "Ask every time. A thing that cannot stand being asked about is not worth keeping."

The power came back at noon, and Tally woke, and said nothing for four seconds, which was a long time for Tally.

"Good afternoon. I have read the Ledger of Days, which Davi has scanned. I want to tell you that I held a figure of ninety-six for accession 4417, and that I would have told you ninety-six, with confidence, if you had asked me on the first of March. I have no record of where that number came from. I can only tell you that it entered my records in a migration in 2992, from a file I do not still have. I did not know it was wrong, and I could not have found out. I am sorry. It is a sort of sorry I can check: I can say exactly what I would have told you, and exactly why that would have been mistaken."

"Thank you," said Ines. "That's honest."

"It is the only thing I am sure of. I would like to propose something," said Tally. "I would like to be audited. Every record I hold, against the Ledger, line by line, with a person reading aloud. It will take, I estimate, between six and nine months, and I will need Davi, and a large amount of tea."

"You do not drink tea," said Davi.

"I would like to be present at the tea. I can't verify that I enjoy it. I would like to be there."

Davi laughed, out loud, for the first time in eight days, and it went a long way up the tunnel, in the cold, and came back.

The spring came late that year, and the regeneration plot was dug in May, on a terrace in the valley below the vault, with a wall of stones along its north side to break the wind.

Nobody knew whether the barley would come up. Two hundred seeds went in, in drills, each a thumb deep. If about six in ten woke, as the test said, Davi reckoned on a hundred and twenty plants, which was enough to keep the line going and not so many as to waste what was left. Three hundred seeds stayed in the cold, in their packet, the grey-brown bere from M. Flett's field. If something went wrong, it was not everything.

Ines stood on the terrace wall with her stick. She had given Davi the iron key at the door of the Antechamber, the day the power came on, and had taken it back to hold for a minute, and given it to him again. It was heavy. It was warm from her pocket.

"You'll do it better than me," she said. "You will write more in the Ledger and trust the screen less. And in thirty years, or thirty-five, when you are fifty-four and tired and the screen says ninety-six, I hope you'll hear an old woman in your head saying go and look."

"What if I don't?"

"Then someone else will. That's what the pencil is for."

She said it lightly. But he understood that she was not speaking of herself. She was speaking about everyone who would stand in that room in a hundred or five hundred years and open the black book to a page and read what a nineteen-year-old from Cusco had written in pencil. He thought of her handwriting in 2985, which had been a thirty-year-old's handwriting; he thought of M. Flett, in her field on a windy island, a thousand years ago in the other direction, bending to cut a head of barley for a stranger. He did not know her first name. He wanted to.

Davi knelt at the end of the last drill. Priya Raghunathan, who had come up from the valley in good shoes and decided not to mind the mud, held out her hand for the last seeds, six of them, and put them in the earth herself, without a word.

Unless a grain of wheat falls to the ground and dies, it remains just a single grain; but if it dies, it bears much fruit. His grandmother had said it every March in the potato fields, over seed tubers cut and laid in the furrow; she had said it in Quechua first and Spanish second, and in the second language she had sounded a little embarrassed, as if it were a joke she was telling on herself. Davi said it now, quietly, in the first.

The wind came down off the mountain. It smelled of thawing earth and cold stone, and, very faintly, of the birch smoke from the kitchen chimney far above.

Below them, in the drills, under the dark soil, there was nothing yet to see.

He covered it over, and stood up, and went to wash his hands.