The Courtesy Arch in the washhouse back kitchen didn’t need high-voltage spell-fire to establish an audio connection. In accordance with Hal Rook’s ancient bronze engraving, an audio consultation was classified as a low-mass sound transit. It needed scarcely forty shakes of tuned deep ringing hum to bridge the flat divide. Pella Rook stood before the arch, struck her small brass tuning fork against the heel of her boot. Then she touched the shaking tine to the unclosed gap in the right-hand rune-track. The bronze upright right away hummed with a pure, bell-like A-note. The quartz slate on the wall refreshed its display with a soft chime.
Through the shimmering oval threshold, which remained narrow and semi-clear to conserve energy, came the distinct, clear background ambiance of a gray Tuesday afternoon in northern England. The rhythmic, muffled thrum of a diesel engine idling in a wet parking lot, the dull metal clank of a mechanic dropping a socket wrench onto concrete, and the tinny, cheerful voice of a local radio presenter announcing traffic delays on the A6120 ring road. Then came the sound of rustling greaseproof paper, a deep, satisfied sigh, and the clearing of a man’s throat.
‘Bell and Cousin Pest Control, Harrowby branch, Imran speaking,’ a calm, measured voice came through the bronze arch, with the distinct crunch of a potato crisp. ‘If you’re calling about the wasp nest behind the cricket pavilion, I told the secretary twice already: I’m on my lunch break until one-thirty, and wasps don’t fly in November anyway. What’s the address?’
Pella stepped closer to the brass speaking horn mounted to the arch’s left support post. Her voice was tight with urgent care. ‘Imran, it’s Pella Rook. From Lowbank. We have a critical living emergency in Sister Merrow’s charity kitchen. The town test judges have given us six hours before they burn the building down.’
A brief pause sounded on the line. It was followed by the soft rustle of a paper lunch bag being folded closed. ‘Afternoon, Pella,’ Imran replied, his tone shifting instantly from off-duty mechanic to alert skilled tradesman. ‘Take a breath. Nobody’s burning anything while I’m on shift. Ada said you folks had your hands full with a leaky boiler. What sort of living emergency are we talking about? Rats? Pharaoh ants? Or did your river overflow into the food stores again?’
‘Beetles, Imran,’ Pella said, clutching the brass horn. ‘Thousands of them. They erupted into the sub-level flour storehouse an hour before dawn. The room contains twelve sacks of milled river wheat—our entire winter grain reserve. The floor is three inches deep in black beetles climbing the burlap sacks. The College Cleansing Office just showed up with smoking sulfur censers, offering to turn to steam the room with brimstone gas. It would turn our flour into battery acid. We refused them, but we have five hours left before they return with an enforcement warrant.’
Imran whistled softly—a low, melodic note of skilled test. ‘Brimstone. Good old turned straight into ash sulfur. That’s what the Victorian millers used to use in Leeds before they realized they were poisoning the flour and blowing up the warehouses. You did right to turn them away. Now, tell me about the insects. Don’t tell me what they look like in a storybook. Give me the biology. Size, color, leg count, wing-cases, and what are their jaws doing?’
Pella unhooked the long brass listening tube from the wall, stepped to the barred larder door. Then she slid the flared funnel through the watching slot. She held the copper chest muscle against the stone door post. ‘Listen to this, Imran. I’m holding the listening horn directly against the timber.’
Through the audio bridge, the wild, dry clicking of thousands of hard-shelled legs filled the speaker. tic-tic-tic, like hail rattling against dry tin sheets at a tempo of four strikes per second. In his van in Harrowby, Imran Bell listened in total, packed silence for thirty unbroken seconds.
‘Two hundred and forty clicks a minute,’ Imran said calmly, his pencil scratching audibly against a clipboard. ‘Steady tempo. High agitation. Pella, lift the horn slightly. Let me hear the wing flutter... Right. Hear that dry rustle? That’s not feeding behavior. When grain beetles or mealworms infest a flour bin, they don’t run around clicking like a typewriter. They burrow deep into the core where it’s dark and warm, and they chew quietly. Those insects aren’t feeding on your wheat. They’re running. What’s the heat in that larder?’
‘The floor is hot, Imran,’ Eren Tal’s deep voice boomed through the horn as the wheelwright stepped up beside Pella. ‘I laid my hand on the stone flags near the baseboard. It felt like forty-five degrees. The mortar in the lower joint is weeping hot rotten-egg moisture. We had a steam breach in the baked-clay channel behind the wall yesterday.’
‘There’s your diagnosis,’ Imran said. His tone carried the calm, easy certainty of twenty years of pest management. ‘You don’t have an infestation, Eren. You have an escape. Those beetles are shale-dwellers. They nest in the underground fissures beneath your city. When your steam pipe broke, the boiling water flooded their nesting chambers. The ground heat hit forty-five degrees, which cooks arthropod larvae in under ten minutes. They aren’t invading your kitchen to steal Sister Merrow’s sourdough. They’re a maternity ward fleeing a burning tenement. If you look closely at the adults, what are they carrying in their jaws?’
Pella gasped, looking through the slot with her hardened carbon-iron lamp. Through the narrow glass, she watched a large black beetle scramble over the rim of a spruce timber. Clutched securely between its heavy, curved pincer jaws was a pale, semi-clear, teardrop-shaped capsule no larger than a grain of rice—glowing with a faint, ghostly turquoise soft glow. ‘They’re carrying egg sacs!’ Pella cried through the horn. ‘Pale, glowing capsules! Almost every single beetle on the wall has one in its mouth!’
‘Exactly,’ Imran said, the click of his clipboard clasp snapping shut echoing through the bronze arch. ‘They’re carrying their brood out of the fire. If you spray them with chemicals, or try to crush them with shovels, you kill four thousand beneficial detritivores, destroy your own winter flour, and blind yourselves to the heat rising under your foundations. Those insects are your underground tracking data, Pella. They’re telling you exactly where the earth is cracking.’
‘Can you help us move them, Imran?’ Pella asked, her voice thick with hope. ‘Can you cross the bridge on your break? We have the Courtesy Arch cleared, and Tamsin Drew has checked our locked deposit balance.’
Imran checked his watch over the line. ‘I have twenty minutes left on my lunch hour, and fifteen minutes of lawful travel time. That gives me a twenty-minute working window on your side of the threshold. I’ll pack my non-chemical test kit: camel-hair brushes, sample boxes, and a bimetallic probe. Keep your larder door barred, keep that young lad away from the hearth, and tell Sister Merrow to find me six large unglazed clay pot flowerpots and two armfuls of damp river moss. I’ll see you at twelve-fifteen sharp.’
The audio connection clicked shut with a soft, melodic chime. That left the back kitchen quiet once more. Eren Tal looked at Pella, then at the barred larder door, a slow shake of his head expressing his deep wonder. ‘A maternity ward fleeing a house fire,’ the carpenter murmured. ‘The College called them demons from the deep pit, and your Yorkshire exterminator knew they were just mothers carrying babies. That was because he listened to the clicking through a brass pipe.’
‘That’s the difference between fear and craft, Eren,’ Pella said, wiping her measuring tongs clean. ‘Now let’s find those clay pot flowerpots before Imran clocks in.’
Imran’s voice crackled through the brass horn once more before the line cleared. ‘One more thing, Pella. When you set those clay pot pots, don’t use tap water or boiled water to wet the moss. Use cold river water from the tidal water gate. Underground beetles navigate by chemical gradients. They track the dissolved stone salts and river silt in the moisture. If you use well-water that has sat in an iron kettle, the dissolved metals will burn their sense hairs and they won’t touch the pots. Keep it raw, keep it cold, and keep it clean.’ Pella scribbled the instructions feverishly onto her slate, nodding at every word. ‘Cold river water from the low weir. Got it, Imran.’
Sister Merrow was already in motion before the echo died. She grabbed two wooden firkins, thrust them into Tavi’s hands. Then she pointed toward the rear back kitchen door. ‘Tavi, take the back gate stair down to the weir gate. Dip two firkins of fresh tidal water from the gravel bar. Don’t let it splash in the mud, and don’t stop to talk to the wharf boys. Eren, help me lift those six terracotta pots onto the wash bench. If we line them with fresh moss and soak the clay, the evaporation will drop the surface heat to twelve degrees within ten minutes. By the time that Yorkshire lad steps through the arch, we’ll have a five-star hotel waiting for four thousand beetles.’