Chapter 12 The Swarm

Dawn of the third day found them inside the migration. Not chasing it, not fleeing it — inside it, wedged into a lane between two rising columns, close enough that the external lamps picked out the nearest climbers in detail Webb's camera plates preserved for the archive: bodies plated and smooth and segmented, some small as torpedoes, some longer than the Shinsengumi herself, all of them rising with the unhurried certainty of bubbles through oil. None turned aside for the submarine. None needed to. The lanes were wide and the visitors were, for the moment, beneath consideration — cargo riding an elevator that had not been built for it. Sato held them there on purpose. Every hour of observation was another page in the only intelligence document on Earth that mattered, and he drove his people to fill it: speeds by the chronometer, depths by the fathometer, spacing by the stadimeter, feeding (there was none), communication (constant, silent to the ear, deafening to Reyes). The young radio man had begun living half his waking life strapped into the chair with the phones, face bloodless, lips moving, taking dictation from a choir that never paused for breath. 'They organize by voice,' he reported on the second evening of it, hoarse. 'Pitch is rank. The low ones give way at crossings, the high ones hold the lane. It is traffic control, sir. Five million years of traffic control, and not once in all that time, as far as I can tell, has anybody asked them where they think they are going.' 'Then we will ask,' Sato said dryly, 'by keeping pace until they answer.' Callahan stood the mid-watch at the viewport night after night, logging columns as the fathometer sang. The ritual of it steadied the boat: Webb calling bearing and spacing in his quartermaster's bark, Sato reducing it to chalk marks on the plot, and Reyes — pale, indispensable Reyes — announcing the totals at the top of every hour in the flat tone of a man reading his own diagnosis. Eight thousand. Eight thousand six hundred. Nine thousand and rising, as the columns they had not yet met came up out of the dark astern and joined the climb. Somewhere past midnight of the fourth day the totals began to blur together, the chalk crowding the plot into a continent of ink. Callahan caught himself thinking of them no longer as creatures but as weather — a front, a system, a thing you sailed within and named and endured. It was Reyes who finally put the number to the whole of it, in the smallest voice they had ever heard him use. Eleven thousand. The number hung in the control room like a struck bell. Reyes stopped announcing after that, his voice finally gone, and nobody asked him to continue. The green mass on the sonar screen had merged into a single continent of light, and the Shinsengumi was climbing through it, nose up, arrays singing, one small bright seed rising through the body of something vast and patient and awake. "Deck plate forty-seven is singing," Webb reported from the ballast station. "Not cracking. Singing. I dislike the verb, but it is the honest one." "Hull pressure?" "Within tolerance. Barely. The engineers who built her would faint if they saw this gauge." Sato held them at fifteen degrees of ascent, neither greedy nor timid, and the old boat climbed. Callahan stood at the viewport with both hands flat against the frame and watched shapes slide past in the lamplight — long plated bodies, pale-eyed, dropping behind one by one but never all at once. A few kept pace for a while at the edge of vision, matching the submarine turn for turn, close enough that he could see the rhythm of their gills open and shut. They were not chasing, he understood then. They were escorting. Or auditing. With creatures that old, the two gestures might be identical. The whisper returned while they crossed eight hundred meters. It brought no words this time. It brought the trench instead — the black seam in the world's floor, the wound with its slow green pulse — and laid the image over his heartbeat until he could not tell which of the two was keeping time. He gripped the frame harder and recited the names of his crewmates one by one, silently, the way a man holds a rope in weather. At three hundred meters the pressure in his skull released all at once, like a hand letting go. The sonar screen thinned. One continent became an archipelago, the archipelago became scattered islands, and the islands sank away beneath a ceiling of ordinary blue water. The ocean above them was suddenly, absurdly empty — no contacts, no chorus, no presence pressing at the edges of the mind, only the plain gray-green nothing that sailors had crossed for ten thousand years without suspecting what it concealed. No one cheered. Reyes slid down the bulkhead to a sitting position, laughed once — a strange, cracked sound — and covered his mouth as if to take it back. Webb brewed the thick black coffee they officially reserved for reactor alarms and handed the mugs down the line without asking. Chen checked the signal log twice, then a third time, hunting for any sign that the frequency had followed them up. It had not. For now, the deep seemed content to watch them go. "Surface when ready," Sato said quietly. "Gentle ascent. Let her breathe." They broke the surface just before dawn, into rain and low cloud and a sea running soft and gray. Through the scope Callahan watched the light come up over the water — ordinary, colorless, the most beautiful thing he had ever seen — while behind him the control room sat in exhausted silence, carrying eleven thousand contacts in their memories and their lives besides. He made himself say it aloud, because logs were logs. "Maximum contact count during ascent: in excess of eleven thousand." He paused. "We are going to need a bigger word than swarm." "A bigger word," Webb agreed, and drank his coffee like a man toasting the living.