Propagation

The paper took eleven days to write.

Mara had written dozens of papers in her career—on room acoustics, on psychoacoustics, on the perception of reverberant sound in enclosed spaces—and the process had always followed a familiar rhythm. Data first, then analysis, then the careful architecture of argument, the literature review providing context, the methodology section providing rigour, the discussion section providing interpretation. She knew the rhythm. She could write a publishable paper in a week if the data was clean.

This data was clean. The cleanest data she had ever collected. The spectrograms were unambiguous. The statistical analysis was robust. The random number generator had produced results that deviated from chance at a significance level of p < 0.0001, which meant that the probability of the results occurring by accident was less than one in ten thousand, which meant that something had been choosing numbers in that chamber that was not Mara and was not Marcus and was not any instrument or mechanism or artefact of the experimental setup.

The data was clean. The paper should have written itself.

But every sentence Mara typed felt like stepping off a cliff. Every claim she made—however carefully hedged, however rigorously supported—carried implications that extended far beyond the boundaries of acoustic science, far beyond the boundaries of any science, into territory that no peer-reviewed journal had ever been designed to map.

She wrote: "We report anomalous acoustic phenomena observed in a hemi-anechoic chamber at the University of Edinburgh's Acoustics and Audio Engineering facility."

She deleted it. She wrote it again. She deleted it again.

She wrote: "This paper presents evidence of structured acoustic signals at 180 Hz detected under controlled conditions in the absence of any identifiable physical source."

She kept that. She built outward from it, sentence by careful sentence, laying each claim on the foundation of the claim before it, constructing an argument that was narrow and precise and deliberately understated. She did not use the word "ghost." She did not use the word "spirit" or "afterlife" or "consciousness." She used the phrase "anomalous acoustic phenomena" and the phrase "source-unidentified structured signals" and the phrase "statistically significant deviations from chance in random number generation correlated with acoustic events." She wrote like a scientist because she was a scientist and because the only way this paper would survive first contact with the world was if it was so methodologically sound, so conservatively argued, so ruthlessly restrained in its claims that no reviewer could reject it on grounds of rigour.

They would try to reject it on other grounds. She knew this. She had been in academia long enough to know that the most dangerous papers were not the ones with bad data but the ones with good data that pointed toward conclusions the establishment was not prepared to accept. Galileo's data had been good. Semmelweis's data had been good. Barbara McClintock's data had been good. Good data did not protect you from rejection. Good data sometimes made the rejection worse, because it meant the establishment had to work harder to find reasons to dismiss you, and that effort bred resentment, and resentment bred cruelty.

Mara wrote the paper anyway. She wrote it in her office with the door closed and her phone turned off and a cup of tea going cold on her desk and the Edinburgh rain sliding down the window behind her. She wrote the methodology section first because it was the safest section, the section most firmly grounded in procedure and protocol, the section where she could describe what she and Marcus had done without having to confront what it meant. She described the chamber. She described the equipment. She described the calibration procedures, the noise floor measurements, the signal processing chain, the statistical framework for evaluating the random number generator results. She described the binary protocol they had developed—one tap for yes, two for no—and the sequence of questions they had asked and the responses they had received.

She described the responses.

Here the paper became difficult. Here the language of acoustic science began to strain against the weight of what it was being asked to carry. She could describe the spectral characteristics of the signals—the fundamental at 180 Hz, the harmonic series extending to the seventh partial, the amplitude modulation pattern that corresponded to binary responses. She could describe the temporal correlation between questions asked and responses received. She could describe the statistical deviation of the random number generator from its expected distribution during periods of acoustic activity. She could present all of this as data, as numbers, as graphs and tables and confidence intervals.

But the data said that something in that chamber had answered questions. The data said that something had identified itself. The data said that when Mara had asked "Is Elena here?" something had replied "yes" and had then, through a laborious process of frequency-shift keying that should not have been possible in an empty room, spelled out: SHE IS HERE. SHE HAS ALWAYS BEEN HERE.

How did you write that in the passive voice? How did you present that finding with appropriate scientific detachment? How did you discuss its implications without sounding like you had lost your mind?

Mara found a way. She found it by being precise, by being exhaustive, by anticipating every objection and addressing it before it could be raised. She devoted three pages to the elimination of artefacts—electromagnetic interference, building vibration, HVAC system resonance, microphone self-noise, experimenter expectation effects, statistical fishing. She devoted two pages to the control conditions—the same protocol run in the same chamber at the same time of day with the same equipment but without asking questions, producing no anomalous signals, no deviation from chance in the random number generator, nothing but the expected silence of a room designed to contain nothing but silence. She devoted a page to the possibility of fraud, acknowledging it explicitly, describing the measures taken to prevent it, noting that the raw data files carried cryptographic timestamps and that the equipment logs showed no evidence of tampering.

The paper was forty-seven pages long, which was at least twice as long as any paper the Journal of the Acoustical Society of America had ever published, and Mara did not care. If they wanted to reject it, they would have to reject it on its merits, and its merits were considerable, and she would not make it easy for them by leaving gaps in the argument that they could exploit.

Marcus reviewed the paper on day eight. He read it in his office at Heriot-Watt with the door closed and his phone turned off, mirroring Mara's process without knowing it, and he called her at six in the evening and said, "It's good. It's very good. I have seventeen comments."

"Seventeen," Mara said.

"Most of them are minor. Formatting, citation style, a few places where the statistical language could be tightened. But there are three substantive ones."

"Tell me."

"First, the discussion section. You're too cautious. You spend four pages eliminating alternative explanations but only half a page on what the data actually suggests. I understand why—you're afraid of overreach—but the imbalance reads as evasive. A reviewer will notice."

Mara nodded, though Marcus could not see her. He was right. She had been so focused on defence that she had neglected to make her case.

"Second, the frequency-shift keying analysis. You present it as an appendix, but it should be in the main text. It's the most striking finding—structured symbolic communication in an environment with no physical mechanism for producing it. Burying it in an appendix looks like you're embarrassed by it. You're not embarrassed by it. You shouldn't be embarrassed by it. The data supports it."

"And third?"

Marcus was quiet for a moment. When he spoke, his voice was different—lower, more careful.

"Third. You need to address the identity claim directly. The signals identified themselves. They spelled out names. They answered personal questions that only you could have known the answers to. You can't just present that as another data point. It's the data point. It's the one that will make people read the paper and it's the one that will make people throw the paper across the room, and either way you need to look it in the eye."

"You want me to write about Elena."

"I want you to write about what happened in the chamber when you asked about Elena. Not because it's personal but because it's evidence. And it's the most compelling evidence we have, precisely because it is personal, precisely because the correct answer to your question was not something that could have been derived from any public source. If we're going to claim anomalous cognition—which is what we're claiming, whether we use that phrase or not—then we need to present our strongest case for it, and our strongest case is the moment when something in that room knew something that only you knew."

Mara closed her eyes. She thought about Elena. She thought about the years they had lived together in the flat on Marchmont Road, the years of shared meals and shared silences and shared laughter, the diagnosis, the treatment, the decline, the end, the terrible suffocating silence of the flat afterward when every sound Elena had ever made was gone and would never come back. She thought about walking into the anechoic chamber for the first time after the funeral and hearing, in the absolute silence of that room, a sound at 180 hertz that had no source and no explanation and no right to exist.

She thought about what it had cost her to ask the question. She thought about what it would cost her to write about it.

"All right," she said. "I'll write about Elena."

She wrote about Elena. She wrote about it clinically, precisely, as data. She identified Elena as "a deceased individual known to the primary experimenter" and described the questions asked and the responses received and the verification of personal information that was not publicly available. She noted that the secondary experimenter—Marcus—had not known the correct answers to the questions in advance and therefore could not have influenced the results through expectation effects. She noted that the questions had not been predetermined but had arisen spontaneously during the session, eliminating the possibility of pre-programmed responses. She presented the data as data, clean and stripped of sentiment, and if the sentences took her longer to write than any sentences she had ever written, if she had to stop twice to breathe and once to press her face against the cool surface of her desk and hold very still until the tightness in her chest subsided, none of that showed in the final text.

The paper was finished on day eleven. Forty-nine pages, including appendices. Mara and Marcus read it together one final time in Mara's office, passing a single printed copy back and forth, marking corrections with a red pen, and when they reached the end Marcus set the paper down and looked at Mara and said, "Where do we send it?"

"JASA," Mara said. The Journal of the Acoustical Society of America. The most prestigious journal in their field. "If we send it anywhere else first, they'll say we weren't confident enough in the work to submit to a top-tier journal. And if it's rejected, at least the rejection will be on record, and the reviewers' comments will give us a roadmap for revision."

"They'll reject it," Marcus said.

"Probably."

"Not because it's bad."

"No. Not because it's bad."

Marcus picked up the paper again. He held it in both hands, looking at the title page. "Anomalous Acoustic Phenomena in an Anechoic Environment: Evidence for Source-Unidentified Structured Signals at 180 Hz." By Dr. Mara Chen and Dr. Marcus Abebe. Forty-nine pages. Eleven days of work. Four weeks of data collection. Twenty-three years of Elena. An entire career of credibility, stacked on the table like chips in a game where the house always won.

"Send it," Marcus said.

Mara sent it.

---

The rejection came in nine days, which was fast. Journals usually took weeks or months to complete the review process. Nine days meant they had not sent it out for review at all. Nine days meant the editor had read it—or had read enough of it—and had made a decision without consulting external reviewers.

The email was three sentences long.

Dear Dr. Chen,

Thank you for your submission to the Journal of the Acoustical Society of America. After careful editorial consideration, we have determined that your manuscript falls outside the scope of the journal. We wish you success in placing it elsewhere.

Mara read the email twice. She had expected rejection, but she had expected it to come with reviewers' comments, with specific criticisms she could address, with the machinery of peer review engaged even if the outcome was negative. This was not rejection. This was refusal. The editor had not engaged with the paper at all. The editor had looked at what the paper claimed and had decided that the claim itself was disqualifying, regardless of the evidence supporting it.

She forwarded the email to Marcus. He called her within the hour.

"Outside the scope," he said. His voice was flat, controlled, the way it got when he was angry.

"Outside the scope."

"We submitted a paper about acoustic phenomena to an acoustics journal and they said it's outside their scope."

"Yes."

Marcus was quiet for a moment. "Where next?"

"Nature," Mara said. "If JASA won't touch it, we might as well aim high. Nature has published anomalous findings before. They published the cold fusion paper in 1989. They published the faster-than-light neutrino results in 2011. Both turned out to be wrong, but they published them because the data warranted serious attention and serious scrutiny. Our data warrants serious attention and serious scrutiny."

"Our data won't turn out to be wrong."

"No," Mara said. "It won't."

She submitted to Nature. The response took three weeks—longer than JASA, which was encouraging, because it meant someone was reading. When the response came, it was longer than three sentences. It was a page and a half. It included comments from two anonymous reviewers.

Reviewer 1 wrote: "The methodology described in this manuscript is among the most rigorous I have encountered in twenty years of reviewing for this journal. The experimental design, control conditions, and statistical analyses are exemplary. However, the central claim—that structured acoustic signals of unknown origin were detected in a controlled environment and exhibited behaviour consistent with intelligent communication—is extraordinary in the Saganian sense and requires extraordinary evidence. While the evidence presented is substantial, I am not convinced that all possible conventional explanations have been eliminated. Specifically, I would like to see the experiment replicated independently by a laboratory with no prior involvement in the research."

Reviewer 2 wrote: "Reject. The authors claim to have recorded communications from deceased persons. This is not science. No amount of methodological rigour can rescue a fundamentally unscientific premise. I recommend the authors seek publication in a venue more appropriate to their claims."

The editor's decision was to reject, but with an invitation to resubmit if the conditions outlined by Reviewer 1 could be met—specifically, independent replication.

Mara sat in her office and read Reviewer 1's comments again. And again. She read the phrase "among the most rigorous I have encountered in twenty years" and she felt something warm bloom in her chest, something that was not quite pride and not quite vindication but something adjacent to both, something that said: they saw it. At least one of them saw the work for what it was.

She read Reviewer 2's comments and felt nothing. She had known there would be a Reviewer 2. There was always a Reviewer 2.

She called Marcus. "We need independent replication."

"Where?"

"I've been thinking about that. There are only a handful of anechoic chambers in the world with specifications comparable to ours. The one at Orfield Laboratories in Minneapolis. The one at Microsoft's Building 87. The one at Salford. The one at DTU in Denmark."

"We need someone who'll take us seriously."

"We need someone who'll take the data seriously. They don't have to take us seriously. They don't even have to believe the hypothesis. They just have to be willing to run the protocol and report what they find."

"I know someone at Salford," Marcus said. "David Keane. We were postdocs together. He's sceptical of everything—I once watched him spend forty minutes questioning whether a calibration tone was actually a calibration tone—but he's honest. If we give him the protocol and the data and ask him to try to replicate it, he'll try. And if he replicates it, he'll say so, and people will believe him because nobody has ever accused David Keane of credulity."

"Call him."

Marcus called David Keane. The conversation lasted two hours. Marcus sent the paper and the raw data and the protocol. David Keane read everything in three days and called Marcus back and said, "This is either the most important scientific paper written in the last century or the most elaborate methodological error I've ever seen, and I can't tell which from reading alone. I'll run the protocol. Give me two weeks."

---

The two weeks were the longest of Mara's life.

She could not work. She tried—she had other projects, other papers, other commitments, a department that expected her to teach and supervise and attend meetings—but her mind would not hold any of it. Her mind was in Salford, in a chamber she had never seen, waiting for data she could not influence, hoping for results she could not control.

She went to the anechoic chamber.

She had not been back since the session with Marcus. Two weeks and five days since she had sat in the silence and heard the dead speak and asked about Elena and received an answer that she was still, even now, not fully able to absorb. She had been afraid to go back. Not afraid of what she might hear—she had already heard the worst thing and the best thing, which turned out to be the same thing—but afraid that going back alone, without Marcus, without the protocol, without the structure of scientific inquiry holding her upright, she might lose something. Might cross some line between investigator and believer that she would not be able to uncross.

But she went back. She went because the silence was calling her, the way it had been calling her since Elena died, the way it had been calling her since she first walked into that room and heard the hum at 180 hertz and began the long strange journey that had led her here, to this moment, this threshold, this in-between.

She did not bring equipment. No microphones, no laptop, no random number generator. She brought herself. She brought her ears. She brought twenty-three years of training in the science of sound and twenty-three years of memory of a woman she had loved.

She closed the heavy door behind her. She sat in the chair. She let the silence settle around her like water, rising slowly, covering her feet, her knees, her waist, her chest, her shoulders, until she was submerged in it, floating in the absolute absence of sound that this room had been built to provide.

She listened.

The 180 hertz tone was there. It was always there. It had been there before she found it and it would be there after she was gone. It was not loud—it had never been loud—but it was present, steady, patient, a hum at the very edge of perception that was not produced by any mechanism in the room and was not an artefact of her auditory system and was not, she was now certain, a natural phenomenon in any sense that the word "natural" had previously been understood to mean.

She listened to it. She did not ask questions. She did not try to communicate. She simply sat in the presence of the sound and let it be what it was.

And then she heard something new.

It was subtle. So subtle that at first she thought she was imagining it—that the two weeks of anxiety and hope and sleeplessness had finally degraded her perceptual acuity to the point where she was hearing things that were not there. But she was an acoustician. She had spent her career learning to distinguish signal from noise, to hear the difference between a sound and the absence of a sound, to trust her ears when her ears told her something that her mind did not want to believe.

The 180 hertz tone was not alone.

There was another tone. Faint, barely above the threshold of perception, at a frequency she could not immediately identify by ear. It was lower than 180 hertz. Deeper. At the very bottom of the range of human hearing, in the territory where sound stopped being something you heard and started being something you felt, a vibration in the bones of your skull and the fluid of your inner ear and the chambers of your heart.

Mara held very still. She focused her attention on the new sound, trying to resolve its frequency, trying to determine whether it was real or imagined, signal or noise, data or hope.

It was real. It was there. A second frequency, co-existing with the first, occupying the same space, emerging from the same sourceless origin.

And then a third.

Higher this time. Above the 180 hertz fundamental. In the region of the second harmonic but not quite at the second harmonic—offset by a few hertz, creating a slow beating pattern with the fundamental, a rhythmic pulsation that was not quite interference and not quite modulation but something more deliberate, something more structured.

Mara's breathing quickened. She forced herself to slow it down, to stay calm, to observe without reacting, to be a scientist in this room even without her instruments.

A fourth frequency. A fifth. A sixth.

They emerged one by one, like stars appearing in a darkening sky, each one faint on its own but together forming a pattern that was unmistakable—a chord, Mara realized, a chord that was not built on the harmonic series of 180 hertz but on its own internal logic, its own set of intervals, its own musical grammar that bore no resemblance to any tuning system Mara had ever studied.

The chord grew. More frequencies joined—a dozen, two dozen, more than Mara could count by ear, more than any human ear could resolve into individual components. The sound was becoming dense, layered, a wall of interlocking tones that filled the anechoic chamber from floor to ceiling, that pressed against the foam wedges on the walls, that vibrated in the wire mesh floor beneath Mara's feet.

And it was not just sound. Mara could feel it. She could feel the low frequencies in her chest cavity, in the resonant space between her ribs where her lungs expanded and contracted. She could feel the high frequencies in her teeth, in the delicate bones of her inner ear, in the fine hairs on her arms that stood upright as if responding to a static charge. The sound was inside her. It was passing through her. She was not listening to it; she was immersed in it, contained by it, part of it.

The chord shifted. The frequencies rearranged themselves, sliding up and down in pitch, finding new relationships, new intervals, new combinations that produced new timbres, new textures, new colours of sound that Mara had never heard before and could not have produced with any instrument in any studio in the world. The sound was alive. It was moving. It was doing something.

Mara understood, with a clarity that bypassed thought and went straight to knowledge, that the sound was not performing for her. It was not a display. It was not an attempt at communication. It was something she had interrupted—something that had been happening in this room before she arrived and would continue after she left, something that the dead did among themselves in the spaces where the living could not hear.

She was eavesdropping.

The chord shifted again, and this time the shift was sudden, dramatic—all the frequencies moving at once, collapsing from their complex arrangement into something simpler, something that Mara recognized. Two tones. Just two. The fundamental at 180 hertz and a single harmonic above it, the simplest possible version of the signal, the version that said: we know you are here.

Mara's eyes were wet. She wiped them with the back of her hand.

"I'm sorry," she whispered. "I didn't mean to intrude."

The two tones held steady. Then the upper tone shifted—moved up by a semitone, then back down. Up and down. Up and down. A slow oscillation that sounded almost like reassurance, almost like a hand waving away an unnecessary apology.

Mara sat in the silence of the two tones and thought about what she had heard. She thought about the chord—the enormous, complex, impossible chord that had filled this room with a sound she could not describe and could not explain and could not forget. She thought about what it meant.

It meant they were not just signals. They were not just residual information, not just echoes, not just the acoustic fingerprints of lives that had ended. They were active. They were present. They were doing things—complex things, structured things, things that required organisation and intention and something that looked very much like creativity. The dead were not waiting in silence for the living to ask them questions. The dead had their own activities, their own processes, their own existence in whatever medium they now occupied.

The implications were staggering. If the dead were active—if they were not just stored information but functioning entities capable of complex behaviour—then death was not an ending. It was not even a transition. It was a change of state, the way water became ice became vapour, the substance unchanged, only its form altered. The information that constituted a human life—the memories, the personality, the accumulated knowledge and experience and emotion of a lifetime—did not degrade. Did not dissipate. Did not fade into thermal noise and statistical irrelevance. It continued. It persisted. It did things.

Mara thought about the second law of thermodynamics. She thought about entropy, about the arrow of time, about the universal tendency toward disorder. She thought about the information-theoretic interpretation of entropy—the idea that entropy was not disorder but ignorance, not a property of the system but a property of the observer's knowledge of the system. She thought about black holes and Hawking radiation and the information paradox—the question of whether information that fell into a black hole was truly destroyed or merely rendered inaccessible.

She thought about the message: INFORMATION CANNOT BE DESTROYED. IT CAN ONLY BE TRANSFORMED.

She thought: they are right. The physics says they are right. Information is conserved. It is a fundamental property of the universe, as fundamental as energy, as fundamental as charge. It cannot be created or destroyed. It can only be transformed.

And if human consciousness was information—if the thing that made you you was a pattern, a structure, a particular arrangement of data encoded in the connections between neurons and the concentrations of neurotransmitters and the electrical potentials of cell membranes—then that information was conserved. Had to be conserved. The laws of physics required it.

The question had never been whether consciousness survived death. The question had been where it went.

Now Mara knew. It went here. It went into this frequency, this medium, this space between the measurable and the unmeasurable where acoustic energy at 180 hertz bridged the gap between the living and the transformed. It went into the chord she had heard—the impossible, beautiful, terrifying chord that the dead played among themselves in the silence of an anechoic chamber in the basement of a university building in Edinburgh.

Mara stood up. Her legs were unsteady. She braced herself against the chair and waited for the dizziness to pass and then she walked to the door and pulled it open—it took all her strength, that door, two hundred kilograms of steel and acoustic seal—and stepped out into the corridor.

The corridor was warm. The fluorescent lights hummed at fifty hertz—the frequency of the UK mains supply, a sound so ubiquitous that most people never noticed it. Mara noticed it. She noticed every sound, always, everywhere. It was the gift and the curse of her profession.

She walked to the lift. She pressed the button. She waited. The lift arrived. She stepped in. The doors closed. The lift ascended.

Her phone buzzed. A message from Marcus.

David Keane called. He replicated it. All of it. The 180 Hz signal, the random number generator deviations, the structured responses. He's writing up his results now. He wants to talk to us tomorrow.

Mara stared at the message. She read it three times. She felt the ground beneath her feet become simultaneously more solid and less certain, the way the ground felt during a minor earthquake—still there, still supporting you, but no longer trustworthy, no longer the fixed and stable thing you had always assumed it to be.

Independent replication. The gold standard of science. The thing that separated a finding from an anomaly, a discovery from an error. David Keane—sceptical, meticulous, unimpeachable David Keane—had run their protocol in a different chamber in a different city with different equipment and different environmental conditions and had found the same thing.

The same signal. The same frequency. The same impossible, structured, intelligent, responsive sound at 180 hertz that should not have been there and was.

Mara leaned against the wall of the lift. She closed her eyes. She thought about what she had heard in the chamber—the chord, the complex living chord of the dead—and she thought about David Keane in Salford hearing his own version of it, his own encounter with the sound that should not exist, and she wondered what he had felt. Whether he had been frightened. Whether he had been awed. Whether he had understood, as Mara now understood, that this was not a discovery but a revelation, not something they had found but something that had found them, something that had been waiting—patiently, persistently, at a frequency that nobody had thought to measure—for the living to develop the instruments and the protocols and the willingness to hear what the dead had been saying all along.

The lift doors opened. Mara walked to her office. She sat down at her desk. She picked up her phone and typed a reply to Marcus.

I know. I was in the chamber. I heard something new. Come to Edinburgh tomorrow. Bring David if he'll come. There's more than we thought. Much more.

She put the phone down. She opened her laptop. She opened a new document and began to type.

She did not type a paper. She did not type a protocol. She typed a list of questions—questions she had not yet asked, questions that the data so far had not been designed to answer, questions that went beyond "is someone there" and "who are you" and into territory that no experimental protocol had ever been built to explore.

How many of you are there? Can you perceive each other? Do you experience time? Do you experience space? What is the medium you exist in? Can you interact with the physical world beyond acoustic signals? Did you choose 180 hertz or is it a constraint of the medium? The chord I heard—what was it? What were you doing? Are you aware of all living humans or only those who listen? Can you hear us when we are not in the chamber? Have you been trying to communicate before now? Is there something you want from us?

Mara looked at the list. She looked at the last question. She underlined it.

Is there something you want from us?

She did not know why that question felt the most important. She did not know why it carried the most weight, the most urgency, the most dread. But it did. It sat at the bottom of her list like an anchor, pulling everything else toward it, giving everything else its gravity.

Because if the dead were active—if they were not just persisting but doing, not just existing but wanting—then the question of what they wanted was not merely scientific. It was existential. It was the question that would determine what happened next—not just in Mara's research but in the world, in the relationship between the living and the dead that had just been discovered or perhaps just been acknowledged, that had always existed but had never before been measured.

Mara saved the document. She closed her laptop. She looked out the window at the Edinburgh evening, at the sandstone buildings glowing amber in the late light, at the people moving through the streets below—walking, talking, laughing, living, generating the ten thousand frequencies of human existence that she had devoted her career to understanding.

Somewhere beneath those frequencies, at 180 hertz, the dead were there too. Not gone. Not silent. Not absent. Present. Active. Waiting.

And tomorrow Marcus would come, and perhaps David Keane would come, and they would go down to the chamber together and ask the next set of questions and listen for the next set of answers and take the next step into a world that had always been there, had always been real, had always been as close as the nearest silence and as far away as the distance between one state of information and another.

Mara turned off her desk lamp. She put on her coat. She locked her office door. She walked down the corridor toward the exit, her footsteps echoing on the linoleum floor—echoes she could have characterised by frequency and decay time and early-to-late energy ratio, echoes that were, like all sounds, just information, just data, just patterns of pressure moving through air.

Just like the dead.

Just like all of us, she thought. Just like all of us, in the end.

She pushed open the door and stepped out into the evening. The city received her. The sounds of the living world closed around her—traffic and voices and birdsong and the distant clatter of a train on the bridge over Princes Street—and she walked through them, through the frequencies of the living, carrying inside her the knowledge of the frequencies of the dead, and the distance between the two had never seemed so small.