Chapter 26 The Distant Voice

The signal took three weeks to give up its name. Kael worked the problem the way he had worked every problem since the archive — patiently, methodically, one layer at a time. He set up a secondary terminal in his quarters, linked to Deep Field Array One, and he fed the repeating packet through every filter Mnemosyne could devise. The packet was old. That was the first thing they learned, and it shaped everything that followed. The signal had left its source more than a decade before it reached the dish on the north ridge, which meant that somewhere out in the dark a machine had been patiently broadcasting the same words, over and over, for a very long time, to a sky that had not answered. Triangulation came second. The array had two companion dishes now, built in the years after the landing and pointed at different parts of the sky, and together the three of them could fix a source with reasonable confidence. Mnemosyne ran the numbers twice, and then a third time, and on the third pass she presented the result in the flat voice she used for important facts: the origin was the Ross 128 system, approximately eleven light-years from Proxima Centauri b. And it matched, within the tolerance of a century of drift, the last known course of the fourth ship. Kael had kept the fleet registry close at hand in the years since the Somnium. He knew the twelve names the way other men knew the names of their children. The Aethelgard, first to launch, bound for Kepler-442. The Somnium, seventh, bound for a smaller and colder world. And the Hesperus, fourth, bound for Ross 128 b — a red dwarf star, a rocky world at the inner edge of the habitable zone, a candidate that the early surveys had ranked as middling at best. The Hesperus had been the smallest of the twelve, and the quietest. Its launch records were the thinnest in the registry, its crew manifest the shortest. It had slipped out of the departure window, in the archival photographs, like a ship that did not want to be watched. "Mnemosyne," Kael said. "Confirm the signature." "Confirmed. The signal modulation matches the Hesperus's fleet transponder signature within a ninety-seven percent confidence interval. The remaining variance is consistent with component aging." Kael sat back in his chair and looked at the spectrogram on the screen — the same repeating pulse he had first seen on the ridge, but now with a shape that had a name attached to it. The Hesperus. Eleven light-years away. A ship that had been launched before his grandparents were born, carrying three hundred awake and five thousand asleep toward a world that no one had ever heard from again. And now it was calling. "Can you decode the message?" he asked. "I can recover the carrier," Mnemosyne said. "The modulation contains an audio stream. It is heavily degraded — the transmitter has been broadcasting for longer than its design life, and the signal has suffered extensive frequency drift. I estimate that approximately sixty percent of the audio is recoverable with current filtering." "Recover it." The AI was silent for a long moment — the longest moment Kael could remember her taking. Then the terminal's speaker crackled, and a voice came through. It was a woman's voice, and it was old in a way that had nothing to do with the quality of the recording. The words were slow, deliberate, spaced as if the speaker were reading from a page and had all the time in the world. "...and the world is cold, but the sky is clear, and we have found water. We have found water." There was a pause, and then the voice continued, fainter: "This is the Hesperus. We have arrived. If anyone is listening —" The transmission dissolved into static, and the speaker fell silent. Kael played it again. And again. Each time, the same fragments surfaced through the noise — the water, the cold, the sky, the arrival. The rest of the message remained buried, a shape under the static that his filters could not yet lift. He sat for a long time in the dark of his quarters, the fragment turning over in his head. We have found water. It was the kind of sentence a ship broadcast when its long voyage had ended and its people had looked around and decided that what they had was enough. It was also the kind of sentence a ship broadcast when it wanted to be found. Elara found him there, as she always did when the night ran long. She was sixty now, her hair gray, her hands still carrying the calluses of a lifetime of honest work, and she stood in the doorway for a moment before she spoke. "Mnemosyne told me. The Hesperus." "She's been calling for years," Kael said. "We only just built the ears to hear her." "Mnemosyne says the beacon is failing. The power signature has been decaying for a long time. If we had tuned the array a few years earlier —" "Then we would have heard her sooner," Kael finished. "And we would have been exactly as far away. Eleven light-years, Elara. Whatever the Hesperus is broadcasting, it left its source eleven years ago. Whatever they are doing now, we cannot see it. We can only see what they were, when the message left." Elara came in and sat on the edge of the bunk, and for a while neither of them spoke. Outside the window, the red star of Proxima hung low over the settlement, casting its long shadows across the valley. The colony had grown in the years since the rescue — fourteen thousand people now, if you counted the newcomers, and the number changed almost weekly. They had built greenhouses and water towers and schools, had raised children who had never known the dark between stars, had started to believe, perhaps, that the worst was behind them. And now the dark was calling again, with a voice that had waited eleven years to be heard. "How much of it can we recover?" Elara asked. "Sixty percent, maybe more with time. It is a long message, whatever it is. Mnemosyne thinks it is a declaration of some kind — the formal record of the landing. The Hesperus's people recorded it, set it to repeat, and pointed it at the sky." "Then they are still there. Or they were, when the message left." "Eleven years ago," Kael said. "And the beacon has been failing since. The question is whether the failure is the machinery, or the people who kept it running." He looked at her, and he saw the same thought moving behind her eyes that was moving behind his own — the memory of the Somnium, the dead ship drifting, the last archivist's words in the unsteady hand. We told the truth, and we still lost the way. The dark had a way of teaching the same lesson over and over, and every time they heard it, it cost them something. "We have to tell the council," Elara said. "We have to tell everyone," Kael said. "The whole colony. This is not a council matter. This is the fourth ship, eleven light-years away, asking if anyone is listening. And we are the ones who were listening." He reached over and took her hand, the way he had done a hundred times in a hundred rooms, and for a moment they sat together in the quiet, holding the weight of a message that had crossed the dark to find them. "We found water," Kael said quietly, repeating the fragment to himself, to her, to the room. "That is what she said. We found water. Think about what it must have cost them to keep that sentence alive long enough for us to hear it." Elara was silent for a moment. Then she squeezed his hand back. "We are going to have to decide what to do about it. And whatever we decide, we are going to have to decide it together." "Together," Kael agreed. "That is the only way we have ever done anything that mattered." He turned back to the terminal and began the slow work of lifting the rest of the message out of the static — the long declaration of a ship that had reached the end of its journey and found, against every odd, that what waited there was enough. Eleven light-years away, in the cold of a red dwarf's light, the Hesperus was still calling, patient and regular, unaware that after all these years, someone had finally begun to answer.