第61章 The Track North

They sailed out of the gate in four directions, and the parting was done in the navy's manner, which is to say almost nothing was said at all. The Skua turned west for the New Zealand stations with her boats lashed and her coxswains already scheming the weather; the Bear stood away northeast with Voss's scientists crowding her rail, and Ingrid Voss herself stayed at the stern until the barrier was gone below the horizon, watching the place where the dome had been as a woman watches a grave close. The Vanikoro rang off the circuit with a formality that fooled nobody and a warmth that fooled everybody, and her captain's last signal, made in plain language instead of the registry's grammar, read simply: we will keep humming. Then there were two ships in all that empty water — the Kairyu on the track north, and the Meridian astern of her with her big ore-finding sonar warmed and working, sweeping the deep road behind them like a sheepdog that had found its true employment late in life. The learner's track came up onto Sano's chart within a day, and it was unlike any track he had ever plotted from natural sound. Natural tracks wander. Whale roads breathe with feeding; current-lines bend; even military tracks, which are drawn with rulers, carry the small human hesitations of men who must eat and sleep and change watches. This track was ruled. It held a straight line for six hundred miles at a speed of nine knots exactly, then altered course by eleven degrees in a single smooth arc that no helmsman could have bettered, and where it crossed the great seamounts that rise like watchtowers along the deep road it slowed — never stopped, never lingered past an hour — but slowed, as a traveler slows at a door to listen before knocking. "It is checking the signposts," Sano said, and pinned the plot to the board. "Captain, I have run the numbers twice. At these depths nothing swims at nine knots for six hundred miles without feeding. Nothing steers to a tenth of a degree without a compass and a will. Whatever our pupil is, it is neither fish nor whale, and it is not drifting. It is going somewhere." Callahan heard it too, from the stern chair, wrapped in blankets in a sea that had turned warm and blue again above the line where the polar water gave up. He heard it the way the carrier now heard everything, without instruments and without mercy: a melody riding up through two miles of water into his bones, accurate as a metronome and dead as one. "It is getting better," he said, on the third evening, and his voice carried a weight that stopped the midwatch conversation cold. "Every day, truer. Not the deep's truth — it hasn't got that and doesn't know what it's missing — but our truth. Our notes, cleaner than our own choirs sing them. Fifty years I taught human beings this song, Captain, and no choir alive holds pitch like that thing does." He looked at his hands on the blanket, hands the color and temperature of ballast now, and said the rest to them rather than to her. "It learns faster than we ever taught." The teaching of the ports went forward as ordered, because the order had gone out before the pursuit began. Halloway ran the traffic like a quartermaster runs stores: teachers landed at Wellington, at Auckland, at Suva, at Guam, each carrying Ishikawa's photostated notation corrected nightly by radio; each carrying also the sentence Tanabe had insisted be spoken first at every lesson, in every language, before a single note was taught — the accompaniment is finished; the verse has not been written; when you sing the waiting chord, lean into it, do not close it. The fleets' hydrophone nets, pointed south whether their governments wished it or no, confirmed nightly that the true version was spreading, port by port, harbor by harbor, a lantern-line lit across half the Pacific. On the fifth night the false version stopped moving. Sano felt it before he proved it, the way sonarmen feel a change in the room before the trace confirms them, and he came to the chart room at 0210 with the plot under his arm and his face carefully arranged into the expression of a man reporting ordinary news. "Bearing one-seven-zero," he said. "Range twenty-nine miles. Doppler dead. It has been stationary for forty minutes, Captain, and here is the interesting thing." He laid the plot down. "Its track for the last five days, projected forward, passes directly through the point where it stopped. It was not resting and it was not hiding. It stopped astride our road, on the exact line we must steam to follow it, and it is sitting there in the dark, waiting for us to arrive." The chart room was very quiet. The pens scratched. Somewhere aft, faint through the hull, the true song leaned patiently into its unfinished measure, and everyone in the room heard both things at once — the promise beneath the keel, the counterfeit ahead of the bow — and understood that for the first time since 1944 the vigil was following something that knew it was being followed. "Options," Tanabe said. "Astern," said Sano. "Or around. We can put two hundred miles abeam of it by tomorrow night and let the Meridian listen while we go about our ports." "And it would learn precisely that," Ellison said, from her seat by the sonar repeater, where she sat with her eyes closed more often than open now. "That we sang to it across an anchorage for a week and then went around it in the night. It is asking to be met, Captain. Whatever else it is, it has been practicing alone in the dark for months, and the first time another singer comes near, it stops and waits on the road." She opened her eyes. "I have known lonely men to do exactly that. None of them were machines." Tanabe stood over the plot for a long moment. Then she pressed the general circuit, and her voice went through the ship at a quarter past two in the morning, waking no one who was not already awake, which in her navy meant everyone. "Officer of the watch, maintain course and speed. Steer one-seven-zero. We will pass over our pupil's position at dawn, and we will pass over it singing." She signed off, and looked around the chart room, and allowed herself the smallest dry note her voice ever carried. "It waited on the road for a thousand miles. The least courtesy we can offer is to keep the appointment. Helm — make revolutions for twelve knots. And someone wake the carrier gently. He will want to be on deck for this." But the appointment kept itself differently than any of them had drafted it. At 0540, with the eastern sky still black and the Kairyu nine miles from the stationary contact, the trace moved — not away, not deeper, but forward, up the bearing, toward them, gathering speed in long deliberate surges like something swimming out from shore to meet a boat it had seen coming over the light. By 0610 the range was closed to four miles. By 0625 Callahan was on deck in two blankets and the ship's oldest coat, standing at the port rail with his face lifted, listening, and what he said then the quarterdeck log recorded, because everyone heard it and there was no unhearing it. "It is not waiting anymore," he said. "It is coming up the road to meet us. Captain — all those months in the dark, practicing, correcting, taking after take—" He stopped, and the dawn came up gray on his face. "It isn't running from us. It never was. It is coming to ask its question in person."