Chapter One — The Preamble

By the time the last warmth left the western stones, Sel had checked the telescope twice and still had no reason to distrust it.

The reference star sat against the hairline. They eased their hand off the adjustment screw and waited for the mounting to settle. Below their feet, someone dragged a chair across the floor. The star shivered, then returned to its place.

Sel entered the reading in the night ledger. Beside it, in the space left for the next observer, they wrote: Lower clamp catches. Lift before turning.

The clamp had taken a strip of skin from their thumb that afternoon. No sense letting it have another.

Across the room, the frequency analyser drew an almost level line on its recording drum. Sel moved the lamp closer. The next pulse was due before the last light went from the window, and they wanted to watch it happen rather than find it afterwards.

The room smelled of warm dust and instrument oil. A folded cloth beneath one leg kept the table steady; on the wall above it, seventeen narrow strips of paper curled away from their pins. Sel pressed the lowest flat. Each strip held a small rise in the ink line, easily overlooked among the tremors on either side.

They had spent most of the afternoon trying to explain those rises away.

The needle lifted.

Sel watched the ink point draw a fine shoulder, hold, then fall. Less than a second. The drum kept turning.

On time.

They put a pencil mark beside the trace and checked the clock. For a moment the pleasure was so clean that they forgot the cold coming through the window. They had written a time in a book, waited, and something without a known source had kept the appointment.

Then they measured the pulse.

It was narrower than the last one.

Sel bent until their shadow covered the paper, moved the lamp, and measured again. A small change, close to the limit of what the ink point could show. They wrote it down without underlining it.

From the stairwell came the scrape of a boot, followed by a muttered complaint. Sel reached for the box of spare parts and moved it out of the doorway.

“You could do that before I come up,” the younger scholar said.

“I keep meaning to.”

They entered sideways, carrying a packet beneath one arm and a covered bowl in both hands. One cuff was wet. Sel cleared a place on the cabinet, away from the records.

“Roof?”

“Kettle.” The scholar set down the bowl. “The roof is behaving. Reply from the coast.”

Sel took the packet too quickly and caught its cord beneath the injured thumb.

“Eat first.”

“How long has it been here?”

“Since the road carrier came. I was changing the paper downstairs.”

“Sorry. I meant—”

“I know what you meant.”

Sel loosened the cord carefully this time. The packet was thin. Months of waiting, and they could feel the table through it.

Outside, the carrier's cart was still visible on the lower road. Its lamp moved in and out of the ridge's shadow. The descent had a bad turn where runoff had eaten the outer edge; from this window the light always seemed to stop there. Sel watched until it moved again.

The scholar lifted the lid from the bowl.

“Still warm.”

Sel sat.

There was barley in the broth, swollen almost to bursting. They ate a spoonful while the scholar inspected the newest trace without touching the paper.

“Another?”

“Narrower.”

“By how much?”

Sel showed the measurement.

“That could be the pen.”

“Yes.”

“Have you cleaned it?”

“This afternoon.”

The scholar leaned closer, keeping their sleeve clear of the drum. “Still could be the pen.”

Sel had been about to say they knew. Instead they turned the notebook so the scholar could see the earlier widths. After a while, the scholar pulled the other stool over.

The tower had very few chairs that belonged to the rooms they occupied. This stool had come from the lower instrument room years ago, and whoever worked there now still wrote requests for its return. Sel had once carried it halfway down before someone borrowed it to reach a shutter upstairs.

They shifted their bowl to make space.

In the oldest records, the anomaly was barely a blemish. Astronomers had been noting irregularities in the background radiation for decades: sometimes a possible recurrence, sometimes nothing for long stretches of usable observation. Beside one early trace, an observer had written shielding? Another had recorded the weather in enough detail to reconstruct an entire wet week.

Sel knew those hands better than they knew some living colleagues. They had followed one observer through years of measurements, watching the figures grow cramped and large as the work became harder to see. The last sheet ended halfway through a night. Sel always looked for another page.

There had been good reasons to file each irregularity and go on. Machinery produced interference. Instruments aged. Chance produced shapes that looked as though they belonged together, especially if someone wanted them to.

Three papers now sat in Sel's cabinet, each an attempt to show why these marks might be different. Copies had gone out; no one had taken up the argument. Sel had made the third shorter, as though the first two had merely been too heavy to carry.

The packet on the table was an answer to something smaller.

They had asked a coastal observatory to set aside an instrument for simultaneous readings. One night, the same settings, clocks checked against the same reference. If a second station caught the pulse, they might at least begin to rule out this room.

Sel put down the spoon and opened the reply.

Two pages. Their proposed observing window had been copied correctly. So had the settings. Sel felt a brief, foolish gratitude at seeing the figures in another hand.

The reply declined the request.

The instrument was committed to other observations. More importantly, the examples Sel had supplied came from equipment whose response had changed over the years. Differences in sensitivity might account for part of the apparent development. The recent regularity deserved further recording, but the station could not yet distinguish a distant source from local interference.

Sel read the last paragraph again. Continued passive observation. A longer run of measurements under unchanged conditions might justify reconsideration.

“Well?” the scholar asked.

“They won't give us the night.”

“Did they say why?”

Sel passed over the letter.

The scholar read slowly, one finger resting beside the copied settings. Downstairs, something heavy shut, followed by two voices disagreeing about whose turn it was to empty the stove. The scholar smiled without looking up. Sel knew the argument. By morning both people would claim to have done it.

“This part,” the scholar said. “About the older equipment.”

“I know.”

“You used those readings in the comparison.”

“With allowances.”

“They don't know whether the allowances are right.”

Sel took the letter back. Their thumb had left a faint grease mark below the final paragraph.

“No. They don't.”

They wanted another instrument precisely because theirs might be misleading them. To make that case convincingly, they needed the evidence the other instrument could supply. Sel laid the reply flat and smoothed its fold with a knuckle until they noticed what they were doing.

The scholar did not offer consolation. After a moment, they asked, “What did you hope they'd find?”

“The same thing.”

“And then?”

“A direction. Eventually. Or a reason to stop looking.”

“Would you?”

Sel looked at the seventeen strips on the wall.

“I'd like to think so.”

The scholar nodded, though Sel could not tell whether the answer had satisfied them.

In the notebook open between them, a word showed through the thin paper from an earlier page. Sel had written it years ago, harder than necessary.

Preamble.

The Orc bone-readers called the anomaly the Whisper. Sel knew no more of what they meant than the word itself. Their own term was no safer. It supposed a message where there might only be a recurrence, a speaker where there might be none.

They had kept it out of the observation request.

The scholar turned the page back.

“You still think that?”

“Sometimes.”

“What would it be saying?”

“I can't tell whether there's anything to say.”

The scholar studied the little ink shapes. “It's rather beautiful.”

Sel had not expected the word. They looked again at the rise and delicate return, repeated across the strips. Each was slightly different. Laid together, they had the balance of something drawn by a hand that knew when to lift.

“Yes,” Sel said.

For a while neither moved. The scholar's shoulder was close enough to warm Sel's sleeve, and Sel found they were glad of the company.

They passed the rest of the watch checking what they could. The scholar read times from the ledger while Sel calculated the intervals, then they exchanged tasks. At one point Sel transposed two figures. The scholar tapped the page, and Sel crossed them out without trying to make the correction neat.

Near midnight, the analyser registered another pulse.

Both looked at the clock. It had come within the predicted window.

The width was much the same as the previous one. The height had increased a little.

“Pen?” Sel asked.

The scholar frowned at the trace. “Perhaps. Write it down.”

Sel did, smiling despite themself.

The scholar yawned, tried to hide it, then gave up. Their watch downstairs was over; in the morning they would have to copy the seismic records before the next observer needed the desk.

“Go,” Sel said. “I'll bring the bowl.”

“Before breakfast?”

“Yes.”

“You said that last time.”

Sel picked it up, intending to follow them at least as far as the kitchen. At the door they remembered the new strip needed a time written on it before they forgot, and turned back.

The scholar waited on the landing.

“Leave it on the stair when you're done. I can take it down in the morning.”

Their steps faded. Sel stood with the bowl in one hand and the pencil in the other. Then they left the bowl on the stair and finished the entry.

The room felt colder without another person in it.

Sel shut the window to a hand's breadth and wedged it with the folded scrap kept on the sill. The tower's original builders had fitted the stones so closely that a knife would hardly enter the joints. No one knew what those builders had intended the tower for. Whatever it was, they had done it without this window, which a later generation had cut crookedly through the wall.

Sel had grown up with that draught. As a child they had stood on a box at a telescope while someone held the back of their coat. They remembered wanting the hand to let go, certain they could balance. They could no longer remember whose hand it had been.

They drew the stool closer to the table.

After allowing for the clock's small drift, the intervals still agreed. Sel marked the next expected time in the notebook and pencilled a narrow window on the unused paper feeding towards the drum's ink point. Even the earliest edge allowed several minutes to check the telescope readings.

At the eyepiece, the reference star held steady. Sel checked a second, then a third. Above the ridge, more stars had appeared as the last haze thinned. They lingered over a close pair that the glass just separated, turning the focus gently until the dark between them opened.

The analyser clicked.

Sel kept their eye to the telescope for another moment, unwilling to blur the pair by moving too soon.

Then they looked at the clock.

The next pulse was not due.

They crossed to the table. The ink point had already fallen. Behind it lay a fresh rise, sharp and complete; ahead of it, still on the unused paper, was the prediction window.

Sel checked the drum first. The feed had sometimes slipped in damp weather. Tonight the paper was taut and the timing marks evenly spaced. The voltage needle held steady. Nothing had struck the table.

They checked the clock against the stellar readings they had just made.

Close enough. Far too close to account for this.

Sel sat and subtracted the times again. They used a fresh part of the page, covering the earlier calculation with the coastal letter so their eye would not borrow its answer.

The interval was shorter.

One early pulse. Perhaps a separate disturbance that happened to resemble the others. Sel brought the lamp down and compared the traces until their eyes watered. The same fine shoulder. The same return.

They reached for the notebook and knocked the ruler to the floor.

The noise made them turn towards the stairs. No footsteps answered it.

Sel picked up the ruler. They could wake the scholar. They could put a second person beside the drum, someone who had not spent years waiting for it to change. First they wanted a time to give them.

Using the shorter interval, Sel calculated where the next pulse would fall if the new spacing held. They drew a second window on the paper, closer to the ink point than the first prediction would have placed it, and checked the arithmetic once more.

There. Still time to go downstairs.

They stood, took the notebook, then set it down again. The scholar would need the clock, not the notebook. Sel was halfway to the door when the analyser clicked.

They turned.

The ink point rose and fell.

The revised window had not reached it.

Sel went back to the table. This gap was shorter than the last. Shorter by more, this time.

Beyond the glass the stars were steady. On the stair, the empty bowl waited to be taken down in the morning.

They left the new trace drying beside the two useless predictions and opened the door.

This time, Sel called loudly enough to wake the tower.