Slipping through the Pigeon Roosts

How long does an empty stone flume take to kill a man if his boots slip? Forty paces above the churning waters of the central canal basin, the Great Aqueduct of Szent-László stretched toward the belfry like a spine of pale bone. Its broad limestone parapet offered an uninterrupted road, though the dry flume lip had crumbled to narrow, pitted margins where privateer mortar shrapnel had bitten into the stone above the brown froth swirling around enemy barges. I kept both hands tucked tight against the lambskin bundle under my jacket, feeling the hard hex of the emerald sun-prism against my ribs. Out west, the oceanic cloud bank was already gnawing at the afternoon sun, eating away the ninety minutes I had left to reach the high belfry before the optical satellites lost their mark.

The wind off the bay came in ragged bursts, throwing spray against the aqueduct’s northern arches. Each gust carried the sulfur reek of naval furnaces and the hollow boom of privateer mortars hammering the lower harbor locks. I paused beside a weathered stone gargoyle, crouched on the balls of my feet, and touched the mortar joints along the outer rim.

Water had seeped deep into the limestone over three centuries of winters. Where the stone showed white crusts of saltpeter, the lip crumbled under light thumb pressure; where the moss clung dark and greasy, the surface offered no purchase at all. I picked a path along the pale grey center line, stepping precisely where ancient water cutters had dressed the channel stone.

A sudden shriek split the wind above my head. Hetyke descended in a flurry of damp slate plumage, nearly smacking me with a wingtip before digging his talons into the gargoyle’s ear. A tuft of indigo goose down from Auntie Sarolta’s attic was still stuck across his hooked beak, giving him the rakish look of an intoxicated carnival masker.

"Keep your wings quiet," I hissed, leaning into the stone channel. "The canal is full of arbalests."

Hetyke clicked his tongue twice and drove his beak against the bronze stud of my coat collar. It was his customary demand for hazard compensation, clear and uncompromising. I fished three salted sunflower seeds from my pocket and pressed them into his open bill. He swallowed them without a pause, rustled his tail feathers, and fixed his golden eyes on the far archway where the aqueduct vanished into the shadow of the Bell Tower.

Down in the canal trench, an iron-plated rowing barge glided beneath the third span. Two privateer deck hands held long brass lanterns on poles, their sulfur flares throwing greasy yellow light across the dripping underside of the stonework. If they tilted those lamps forty degrees upward, they would catch my silhouette stamped clear against the pale western sky.

I unhitched the privateer grapple winch from my belt. Working by touch, I looped the braided cord twice around the throat of the carved water spout behind me, clicking the ratchet into friction lock. With ten paces of tension cord gripped in my left fist, I eased my center of gravity into the trough of the flume, sliding belly-down along the curved limestone floor until the sweeping lantern beam swept across the stone arch above me.

The light passed within a handspan of my boots. Below, a privateer officer shouted an order in the gutter dialect of the Outer Shoals, followed by the dull splash of ash dumped over the gunwale. The barge drifted past, its heavy oars thumping against the current.

I clicked the ratchet release, retrieved the cord with a wrist flick, and sprang back to my feet. The final fifty paces across the aqueduct went fast. My leather soles found the dry chisel grooves, carrying me into the yawning masonry arch where the water channel pierced the northern buttress of the Cathedral of Szent-László.

The transition from the wind-whipped skyline to the interior of the cathedral eaves felt like stepping into an old library. The roar of the siege muffled into a low, vibrating hum that pulsed through the floor stones. The air was warm, smelling of dry cedar timbers, centuries of dust, and the comforting, oily pungency of pigeon droppings.

Hundreds of soft coos greeted me from the gloom above. Deep in the rafters hung the nested rows of the city’s ancient courier lofts—stout wicker and oak boxes built during the Old Council when messengers traded dispatches across the seven hills.

Hetyke immediately took charge. He launched himself from my shoulder with an arrogant flap, banked hard over a beam, and slammed feet-first into a prime cedar nesting box, evading the protests of two plump, slate-colored pigeons. The displaced birds fluttered down to a lower joist, complaining in indignant burrs while Hetyke preened his ruffled chest and stared down at me with the smug authority of a landlord inspecting collected rent.

"You're a disgrace to the guild," I murmured, leaning back against an upright pine pillar.

My knees finally allowed themselves a slight tremble. I unbuttoned my coat and pulled out the flask of spiced chicory brew Master Nyírbátori had given me. The tin was still warm against my palms. I took two long swallows, the sharp bite of roasted chicory and cinnamon chasing the damp chill out of my collar. From my inner pocket, I withdrew the heel of a dry walnut roll I had stashed that morning before the first mortar shell hit the bay.

I broke off a crust and tossed it up to Hetyke’s box. The falcon caught it mid-air, pinned the pastry under his talon, and tore into it with ferocious satisfaction, entirely unbothered by the artillery rumble rattling the leaded roof tiles.

While Hetyke ate, I approached the master dispatch cubby set into the central brick pier. The wood was grey and split with age, branded with the three-feather crest of the Gyöngyvár Messenger Guild. Most courier lockers along the rooftops had been cleared out decades ago when the aldermen cut the runners' stipends, but this station sat forty yards above the church floor, accessible only by the narrow water flume or a two-hundred-foot belfry ladder.

I slid my fingers into the recessed bottom shelf, searching the dead space behind the cedar dividers. My fingertips brushed against dry greasecloth.

Carefully, I worked the bundle free. Inside lay a roll of stiff, varnished vellum, its edges stitched with waxed harness thread to keep out damp. When I unrolled it across my knee, the faded iron-gall ink revealed a detailed cross-section of the entire Bell Tower structure.

"Look at this, feathers," I whispered.

Hetyke lowered his head, beak covered in walnut crumbs, and gave a skeptical chirp.

It was an architectural routing plan drawn by the guild elders during the Great Canal Flood. The main spiral staircases leading up to the spire platform were marked in red ink as sealed by heavy iron drop-gates—the very barricades Captain Botond’s sappers would expect anyone to use. But running straight through the center of the tower was a vertical channel labeled The Weight Well. It was the counterweight shaft for the cathedral’s lost astronomical clock, fitted with brass guide cables and iron inspection rungs every three spans, climbing straight through the bell-cradle and exiting behind the optical mirror housing.

The shaft gave me an unobstructed, interior route to the summit, completely bypassing any privateer pickets guarding the lower landings.

I folded the vellum and tucked it securely beside Master Nyírbátori's cipher disc. The emerald crystal remained snug in its oiled lambskin, cold and waiting.

I stepped quietly toward the tall oak louvers set into the south face of the belfry loft. Pushing two weathered slats aside with my thumb, I peered down into the plaza of the South Lock.

The view cleared the cobwebs from my head.

Seventy paces below, the circular cobblestone square was choked with privateer raiders. Blackened iron coats and barbed kettle helmets gleamed beneath the pale sky. In the center of the square, forty mercenaries were swinging a timber-framed battering ram capped with a jagged iron boar’s head, smashing it repeatedly against the reinforced oak doors of the South Lockhouse.

Behind the splintering doors, through the narrow arrow slits of the lockhouse parapet, I saw the polished copper breastplate of Lieutenant Hunor Dorozsmai. He and twelve canal watchmen were pinned inside, their crossbows firing in ragged volleys to keep the sappers off the lower hinges. A heap of burning pitch barrels had been rolled against the building's waterline; black oily smoke was already licking through the watchhouse floorboards.

If the lockhouse fell, the privateers would seize the winches for the Great Chain, opening the inner harbor to their entire fleet.

I looked up at the sky. The oceanic storm bank was dragging its belly across the western islands, its dark grey shadow crawling toward the sun. I had seventy minutes before the light failed, and the only vertical route to the spire was right behind me.

I could climb the shaft, set the prism, and fulfill my task while Hunor and his men were overrun below. Or I could find a way to make ninety pounds of privateer artillery crash on the wrong heads before I climbed.

I drew back from the louvers, closed my coat over the sun-prism, and set my hand on the brass speaking tube that snaked down through the floorboards.