Imran Bell adjusted the straps of his check headlamp, stepped through the shimmering oval in Sister Merrow’s washroom, and right away checked the digital readout on his wristwatch. The timer on his wrist showed fourteen minutes and forty-two seconds leftover on his authorized transit window. Behind him, the brass arch hummed with its steady, low shaking. It cast a cool blue circle onto the scrubbed flat stone slabs.
The kitchen was pitch-black except for the single candle held by Pella Rook. The room smelled of cold boiled tea, dry wood shavings, and the sour tang of Merrow’s sourdough crust proofing in clay pot crocks under linen towels. But beneath those familiar domestic scents, Imran’s trained nose caught something far more alarming. The sharp, acrid stench of baked river silt, heated stonework. The distinct organic odor of distressed insect pheromones.
‘The crawlway is behind the flour bin,’ Pella whispered. That kept her voice low to avoid waking the town guards stationed out on Fish Street. She held the candle forward, lighting up the rough hole Eren had cut through the foundation stonework. ‘They’ve been clustering on the brickwork since midday. Eren tried scraping them away with a trowel, but they return within ten minutes.’
‘Scraping is useless when the stimulus is nonstop,’ Imran said mildly. He dropped to his knees on a burlap mat Eren had laid across the damp dirt. He slid his light metal equipment case forward, flicked the latch. Then he removed a lit up hand magnifier and a digital surface probe. ‘Insects don’t hold committee meetings, Pella. They follow heat gradients, moisture boundaries, and pheromone trails. If they’re gathering here, your cellar is offering them something the riverbed no longer provides.’
Imran crawled into the narrow opening on his elbows and knees. The stonework was low and jagged. Crushed pipe lime from Eren’s hammer blows sifted down onto the shoulders of his blue Harrowby Pest Control overalls. The air grew rapidly warmer as he moved inward. Five feet from the washroom wall, the chill of winter mud vanished fully, replaced by a dense, stifling heat that made his forehead sweat inside his plastic hard hat.
He reached the ceiling vault above the old gallery breach. He clicked on his headlamp. He set the beam to its lowest diffuse setting to avoid blinding the specimens. The brickwork above him was entirely alive. Thousands of black, armored lantern beetles—each the size of an English walnut, with rainbow-bright bronze wing-cases and segmented copper-colored antennae—clung to the mortar courses in dense, pulsating clusters.
Imran didn’t flinch. In Yorkshire he had crawled through Victorian crawlspaces choked with German cockroaches and rat burrows. Insects in themselves were neither frightening nor repulsive, merely indicators of load-bearing condition. What caught his skilled eye was their stance. They weren’t feeding. They weren’t fighting. They were packed shoulder to shoulder, their bodies flattened against the mortar joints. It trembled in slow, rhythmic pulses.
He unscrewed the brass protective sheath from his surface heat probe. Then he pressed the copper tip against the mortar between two foundation stones. The digital readout flickered, steadied, and climbed: 26°C, 30°C, 32.2°C. Ninety degrees Fahrenheit.
‘Ninety degrees,’ Imran muttered into the gloom, jotting the number in his spiral notebook with a waterproof grease pencil. ‘The river water outside is forty-one degrees. The ground frost is three inches deep. Yet this mortar is warm enough to proof yeast.’
He adjusted his lit up magnifier and focused on the underside of a large female beetle near the center of the cluster. His breath caught in his throat. Suspended between the creature’s rear claspers was an oval egg sac, semi-clear and pale amber, the size of a barley corn. As he watched, two other females shifted, revealing matching sacs glued to the warm lime joints.
He pulled a camel-hair brush from his breast pocket, dipped the bristles in sterile saline to make them supple. Then he gently nudged the edge of an egg cluster. The female beetle didn’t bite or scatter. She simply shifted her weight, buzzing her wing-cases with a dry, papery rattle, defending the brood with the sluggish determination of an animal exhausted by labor.
Pella’s voice drifted through the crawlway opening, muffled by the stonework. ‘Imran? What do you see? Eren thought they were demon-spawn drawn by the arch’s light.’
‘Eren is a carpenter, not an entomologist,’ Imran called back quietly, his voice level and cold and exact. ‘These are Harvester Lantern Beetles. Standard Lathmere wetland scavengers. But they’re exhibiting severe reproductive shifted weight. Look at the egg sacs.’
He gently scooped one loosened amber sac onto the tip of his brush, passed it into a clear plastic sample vial. Then he sealed the screw-top lid. He took two more vials, collecting two adult specimens with a deft sweep of his soft bristles, labeling each tube with the heat, height above cellar datum, and the exact timestamp.
Through his magnifier, he examined the development of the embryos inside the semi-clear casing. The segmentation was already advanced. The tiny eye-spots were distinct dark specks beneath the membrane.
He checked the moisture boundary along the mortar channel. In a standard winter riverbed, these beetles hibernated in cold silt at eight to ten degrees. Their body-energy rates dropped to near immobility until the spring freshet warmed the shallows. Here, the extreme heat lift had triggered their hormonal spring cascade prematurely. That forced them to burn their stored fats in an emergency egg-laying cycle.
‘If these eggs hatch in this heat without fresh water and wetland algae,’ Imran noted aloud, writing on his pad, ‘the first-instar larvae will desiccate within twenty-four hours. They’re laying into an outside trap.’
‘They’re laying eggs three weeks ahead of their living calendar,’ Imran said, backing out of the crawlway on his knees and dragging his tool case behind him. ‘Lantern beetles lay in late spring, when the mudflats reach sixty-five degrees. Right now, the riverbank is ice and slush. But down here, this foundation floor has been turned into an artificial incubator.’
He emerged back into the washroom, wiping brick dust from his cheek with the back of his canvas glove. Pella was watching him with wide, troubled eyes, her hands clasping her student slate against her chest. Sister Merrow stood by the kitchen door. She grabbed a heavy iron ladle as if prepared to club a stray beetle if it crossed the threshold.
‘So they came for the heat?’ Pella asked, her slate pencil poised.
‘They came because their natural deep burrows along the river wharf have become uninhabitable,’ Imran explained. It snapped his tool case shut. ‘When soil heats up rapidly from below, underground insects move upward toward cooler air. They reached your cellar floor, found a warm, sheltered pocket. Then they triggered their emergency laying cycle. They think it’s spring because the stone floor is ninety degrees.’
He pointed toward the floorboards that separated the washroom from the old gallery breach. ‘This heat isn’t natural, Pella. It’s not earth-heat slow leak. Earth-heat water carries sulfur and dissolved salts that leave white crusts. This heat is dry, radiant friction. Something massive and bare is running beneath your city, baking the clay beds dry.’
Sister Merrow crossed herself, her wooden rosary beads clicking against her apron. ‘The College. Master Sorell has been stoking the Hollow Crown’s fire-chambers since the new moon.’
‘He isn’t stoking fire,’ Imran said, glancing down at his wristwatch. The digital display blinked: one minute and twenty seconds leftover. ‘Fire produces smoke and draft. This is moving heat. High-speed liquid being forced through restricted baked-clay passages. The friction is heating the surrounding stone like a blacksmith’s forge.’
Pella wrote rapidly on her slate, her chalk grating against the stone. ‘Can we drive them out? The neighbors are scared. If the college court guards see them, they’ll declare this kitchen a demonic infestation and burn the timber to the ground.’
Imran stood up, lifting his light metal case. ‘If you drive them out into the winter cold, they die. And more importantly, you lose the only warning system you have.’
He stepped into the glowing oval of the brass arch. The runes along the curve pulsed with soft blue light, mirroring the seconds counting down on his wrist. ‘Don’t touch them with chemicals, Pella. Don’t let Eren touch them with a torch. I will prepare a living shifted weight plan during my morning tea break tomorrow. But leave them alone tonight.’
He looked down at the sample vial in his pocket, then back at Pella through the shimmering air. ‘They aren’t invaders. They’re refugees from the same pipe that’s trying to drown you. Treat them with respect.’
The arch chimed once, a clear, ringing tone that signaled the end of the shift. Imran stepped through the threshold, the blue glow collapsed into a thin silver thread. The washroom was plunged back into the quiet, candlelit darkness of Lowbank.