Running Through the Specimen Stacks

The iron stairs ended in an ocean of frozen steel shelving that smelled of bitter brine and sulfur. Overhead, the emergency strips had dimmed from white to an amber hum, leaving the narrow aisles between twenty-foot racks in cold shadow. Soledad kept her carbine held low across her chest, her thumb resting on the pneumatic selector while her boot heels clicked against the perforated floor plates.

"Keep five paces between shoulders," she told the two men ahead of her. "Step on the center bolts of the deck. The vibration carries down the lateral vents if you drag your heels."

Geraldo took two hurried strides, his hands clutching the ripped shearling collar of his coat against the freezing draft. "A charming piece of marching drill, Marshal. My boots are hand-stitched cordovan. If they crack against this permafrost gravel, the ministry will receive an itemized invoice for twenty-four hundred reales."

"Move your feet, Sotomayor," she said. "Or I will leave you behind to negotiate the bill with whatever tore through Drawer Eleven-B."

Dario did not look back. He gripped the heavy titanium de-icing lance with both hands, using the insulated shaft to test the floor ahead before committing his weight. His knitted balaclava was rimmed with white crystals around the mouth hole, but his eyes darted continuously along the stenciled bay markers above each bay.

"The air current is blowing toward the south riser," Dario said, his voice muffled behind the wool. "That means the extraction fans on the secondary manifold are still turning. If we follow the cold draw, we hit the refrigeration hub before the auxiliary coolant loop boils."

Soledad raised her left glove, catching the dry, chemical breeze on the bare slit of her wrist sensor. The tiny liquid-crystal readout on her gauntlet blinked: minus thirty-eight point six degrees.

The ambient reading had climbed three-tenths of a degree since the blast door dropped. It was a microscopic shift to bare skin, but inside the storage stacks, it was an eviction notice.

"How many cross-aisles between this landing and the hub?" she asked.

"Sixteen," Dario replied. "Each one holds eighty specimen bins. Mostly deep-core flora and extinct pleistocene raptors from the second excavation layer. None of them were flagged for mobile neural retention."

"The canid in Eleven-B was not flagged for mobile retention either," Soledad said. "Pick up your stride."

The corridor narrowed as they plunged between racks towering four tiers high. Behind heavy quartz plates, dark shapes rested in cloudy baths of liquid argon and silicate oil. Great feathered skulls with curved beaks hung suspended beside bundles of jointed limbs, their claws curled inward like dry fern fronds. On the third tier to their right, a drum-sized specimen jar had begun to weep yellow beads of condensation down its glass flank.

Geraldo squeezed past the jutting corner of a manifold rack, his fur parka scraping against a frosted copper valve with a high, screeching whine. "Mother of God. Look at that one. The skull has three eye sockets on the nasal ridge."

"Keep your eyes forward," Soledad commanded, shifting her grip on the carbine.

A sharp tremor rippled through her right palm. The radiation palsy struck without warning, a dull electrical spasm that locked her index finger against the trigger guard. She jammed her wrist hard against the heavy leather sling of the weapon, using the tension of the strap to hold the barrel level until the trembling subsided into an ache in her forearm.

Dario paused at the mouth of Aisle Seven, holding his acoustic wand against the steel stanchion. The brass tip chimed against the metal, sending a faint vibration into the framework. He listened for two heartbeats, his head cocked toward the darkness above.

"Nothing moving on the lower crossbars," he murmured. "The structural weld is solid."

Soledad stepped up behind him. She reached into her webbed utility harness and pulled out a palm-sized aluminum cylinder with a knurled collar and a frosted glass lens. She pressed the coupling pin on its base until a pale green diode winked to life beneath the casing.

"Take this," she said, pressing the cylinder into Dario's mittened hand.

Dario stared down at the device. "A tactical transponder."

"An auxiliary pulse beacon," Soledad corrected. "It links directly to the telemetry receiver on my gauntlet. The local repeater network is dead, but this unit uses low-frequency magnetic ground waves through the granite bedrock. Range is two hundred paces through dense steel."

"Why give it to me?" Dario asked, looking up at her face.

"Because you know the junction layout and I have the rifle," she said plainly. "If the lighting array fails completely, or if an overhead rail collapses between us, I need to know which aisle you are in. Press the side stud twice to transmit a locator chirp. Press it three times if you find a blocked bulkhead."

Dario slipped the beacon into the chest pocket of his canvas coveralls, pulling the heavy zipper shut over it. "And if you get separated from us?"

"Then keep running toward the refrigeration hub," she said. "The bypass key in my pocket will not help you if you stop to look for a corpse."

Geraldo cleared his throat with a dry, rattling cough. "A comforting sentiment, truly. Nothing stiffens the civilian spine like a marshal planning her own funeral before breakfast. Tell me, do either of you possess a flask of brandy, or does this tomb run entirely on bureaucratic fatalism?"

"Quiet," Soledad hissed.

She halted ten paces into the central intersection of Aisle Nine. The amber emergency strips along the ceiling flickered once, hummed on a lower frequency, and died.

Total darkness dropped over the stacks.

For three seconds, the only sound was the hoarse rattle of Geraldo's breathing and the distant, wet thrum of the ventilation shaft miles below. Then Dario clicked the switch on his headlamp. A hard cone of white halogen cut through the black, catching floating motes of frost that drifted like salt across the corridor. Soledad snapped the barrel light of her carbine on a heartbeat later, sweeping the beam along the upper catwalks.

The quartz viewport on Specimen Bin Forty-Two was empty.

Inside the iron cage, two broken mounting struts hung loose in the dark. The preservative fluid had drained into the floor trough, leaving a sticky, yellow grease that ran in ribbons across the grated deck.

Soledad stepped forward, her beam fixing on three distinct gouges torn into the galvanized iron stanchion. The scratches were fresh. The bare metal inside the cuts had not yet gathered frost.

"How heavy was the specimen in forty-two?" she whispered.

Dario stepped beside her, his breath plume cutting across her light beam. His eyes scanned the stamped brass inventory plate bolted to the frame. "A juvenile dire-caracara. Scythe-talons. Double-jointed tarsus. Weight forty kilograms."

"Can it fly?" Geraldo asked, his voice suddenly jumping an octave. "Please tell me the four-thousand-year-old butcher-bird cannot fly."

"The wings are vestigial running flaps," Dario whispered. "It hunts along the ground. On foot."

Soledad raised her carbine into the pocket of her shoulder. She tilted her head toward the ceiling, straining her ears past the mechanical drone of the distant fans.

From the darkness of Aisle Eight, twenty yards to their left, came a dry, rhythmic scratch: curved horn dragging across a corrugated steel beam. An answering scrape echoed from Aisle Ten, followed by the rapid, rhythmic tap of talons closing behind them.

Geraldo took a stumbling step backward into the shelving. "They have boxed the aisle."

Soledad lifted her gauntlet, watching the pulse receiver blink against her wrist. The three acoustic markers were not converging to strike. They moved with mechanical symmetry, fifty paces apart, matching every step the survivors took.

"They are not hunting," Dario whispered, staring into the dark cross-cut. "They are herding us toward the central processing gate."

The schematic on the stanchion showed two ways forward. The central aisle offered a straight run to the secondary hub, but it led directly into the killing pocket the pack was preparing. The only alternative was the narrow glycol drainage duct behind the riser, an unheated crawlway where they would have to abandon their heavy weapons and risk suffocating on ammonia vapors if a seal failed.

Soledad racked the charging lever of her carbine, seating a tungsten dart into the breech.

"We take the central line," she said, her voice steady in the freezing dark. "We keep the lance and the rifle. If we crawl into that drainage pipe, we die on our knees without a shot."