A freezing drizzle fell across the rusted iron roofs of Slum Ward 9. That turned the coal dust in the gutters into black slurry. Inside the converted town pump house that served as Arthur Vance’s field clinic, the only warmth came from a potbellied cast-iron stove that rattled with every gust of wind off the northern canal chimney pipes.
Barnaby, Toby Mallow’s bristly young burrow-hog, lay curled beneath the stove skirt. His armored snout was tucked beneath his short forelegs. Meanwhile, his flanks rose and fell in slow, snuffing snores. Across the flat stone slabs, Grimm occupied the threshold of the rear storeroom. The black glass-boned hound rested his massive jaw across the steel toes of Arthur’s spare field boots, his golden amber eyes half-lidded but fixed on the entrance. He didn’t twitch when the rain lashed against the corrugated zinc shutters. Even so, one scarred ear swiveled backward whenever Arthur shifted a brass sample jar on the shelf.
“That’s seven work hounds in three days, Arthur,” Toby said from behind a scarred pine desk, dipping his steel nib into a well of purple dark oak-ink. His glasses were held together at the bridge by green copper wire. His fingers were stained with lamp soot. “Seven. Old Man Corvin said his beast was pulling a melted rock waste cart at noon, stopped to drink from the town drainage channel by Gate Four. Then he began convulsing before the whistle blew. The guild masters are blaming sewer rot, but sewer rot doesn’t drop a three-year-old draft mastiff in twenty minutes.”
“Sewer rot produces septic peritonitis and enteric hemorrhaging over seventy-two hours,” Arthur replied without looking up. He wiped the carbon steel of a number-four razor knife handle with an alcohol-soaked linen cloth. “It doesn’t induce total breathing arrest while an animal is standing in harness.”
A wild pounding hammered against the heavy oak clinic door.
Before Toby could drop his ledger, the latch rattled and the door swung open against the damp wind. Old Man Corvin, a stooped blast-fire stoker whose leather apron was scorched black from decades of molten melted rock waste, stumbled over the threshold. In his heavy, trembling arms he cradled an eighty-pound Sump-Mastiff.
The hound’s coarse brindled coat was soaked with ditch water. Its neck was thrown back in desperate opisthotonos, the ribs heaving in violent spasms as the chest muscle fought to drag air through an obstructed windpipe. From the animal’s black lips and nostrils bubbled a thick, thick, sticky froth. Not the pink foam of congestive lung fluid swelling, but a vivid, rainbow-bright cobalt-blue gel that smelled faintly of sweet petroleum and burnt almonds.
“Master Vance!” Corvin rasped, his voice cracking beneath tears and coal grit. “Burl... He collapsed five minutes out of the foundry yard! He can’t draw breath! He’s choking on his own spit!”
“On the zinc slab. Now,” Arthur commanded.
The cold and exact calm of twelve years in emergency beast-doctor trauma theaters took hold of Arthur’s nerves like cold water. He swept a row of glass culture dishes aside with one forearm and caught the dog as Corvin lowered him onto the drainage table.
“Toby, suction tube and suction bulb,” Arthur snapped. “Grimm, hold the outer edge.”
Grimm rose instantly, his black glass claws clicking once against the wet floor before he posted himself beside Corvin. The hound didn’t bark. He simply pressed his broad, solid shoulder against the old stoker’s knee, offering an unmoving physical brace that kept the panic-stricken man from collapsing into the tray.
Arthur clamped a brass mouth spreader tool between the mastiff’s jaws and threaded a wide-bore glass hollow tube down the oropharynx. Squeezing the rubber bulb, he tried to aspirate the airway.
The pushback was total.
The blue foam was not liquid. It was a semi-solid, jelly-like matrix that clung to the pharyngeal mucosa like man-made glue, stretching into tacky strings that gummed the intake eyelets of the suction tube. Arthur dropped the bulb, placed both palms over the dog’s lower chest wall. Then he delivered three sharp, rhythmic compressions to force a breath out.
The dog’s chest didn’t yield. The chest wall felt like seasoned oak timber over an over-inflated rubber tire. The lungs had lost all rule-following.
Beneath his fingers, the rapid flutter of the thigh pulse stuttered, skipped three beats. Then he flattened into a barely noticeable quiver. The mastiff’s pupils dilated into fixed disks. A final shudder rippled through the between-rib muscles, and the animal went limp.
The clock on the stonework wall ticked twice in the silence.
“He’s gone, Corvin,” Arthur said quietly. His hands remained steady on the dog’s ribs. He felt the last micro-currents of heat energy fade from the muscle tissue.
Old Corvin’s knees buckled. Grimm leaned his weight into the man’s shins. That kept him upright while a low, rough whimper escaped the stoker’s throat. “He was my brother’s pup... Pulled the melted rock waste barrows when my knees gave out... What did this to him, Master Vance? What kind of poison turns a dog’s breath to blue tar?”
“I’m going to find out,” Arthur said. He met the old man’s bloodshot eyes with unblinking focus. “No charge for the check, Corvin. Go to the front room and let Toby write down the exact drain channel where Burl drank. I need your permission to open the chest.”
Corvin wiped his sleeve across his face, looked at the still body on the slab, and nodded once before Toby gently guided him into the warm nook near the stove.
Arthur turned to the prep tray. He stripped his canvas work coat, rolled the sleeves of his linen shirt past his elbows, and tied on a heavy oilcloth apron. His fingers selected a ten-inch joint padding knife and a pair of broad-blade rib shears.
“A good beast deserves an accurate post-mortem,” Arthur murmured to the room.
He drew the joint padding knife along the ventral midline, slicing from the neck-vein notch of the manubrium straight down through the fat under the skin to the xiphoid process. The blade parted the muscle tissue with clean, dry care. There was remarkably little bleeding. The dark blood in the neck-vein trunks was dark, thickened, and deoxygenated to purple-black.
Arthur grasped the rib shears, placed the lower jaw beneath the third costal joint padding on the right side. Then he crunched through the bone.
Snap. Snap. Snap.
The heavy clinic door creaked open a second time.
A blast of cold, clove-scented smoke swept into the room, followed right away by the harsh, scraping tread of hobnailed boots.
Professor Bramwell Heseltine stepped into the light of the gas lanterns. The Senior Chair of Comparative Sickness at Ironfang Academy was draped in a sodden, fraying tweed greatcoat over a stiff rubber cutting-open apron permanently darkened by dried blood bile. A battered clove cigarillo smoldered between his nicotine-yellowed teeth. A pair of brass-rimmed jeweler loupes hung askew over the thick lenses of his glasses.
Heseltine paused three paces from the slab, his bulbous nose twitching as he sampled the air.
“Man-made ester degradation,” the old professor rasped, coughing a wet rattle into a stained silk handkerchief. “Smells like cheap almond paste and burning rubber. I caught the plume drift all the way from the Sector Seven tram depot. Put down those poultry shears, Vance. You’re butchering the costochondral junctions like an apprentice animal fat-renderer.”
Heseltine shrugged off his wet coat, threw it over an empty water barrel. Then he unbuckled a scarred leather kit strapped to his hip. From the velvet lining, he pulled out his signed name fourteen-inch black glass bone-saw, its micro-milled teeth glinting black under the gas mantle.
“Move aside, boy,” Heseltine grunted, stepping up to the right flank of the carcass.
Without waiting for an answer, the old corpse-judge wedged his left thumb into the cut chest margin, seated the black glass saw against the fifth rib. Then he drew the blade backward with a single fluid, high-speed rasp. The bone cut without splintering, singing with a faint high-pitched chime that made Grimm’s head jerk upward from the floor.
In four seconds, Heseltine excised the entire right chest plate. He lifted the bony shield away to expose the chest around the lungs.
Both men went motionless.
Normal canine lungs collapse inward into pale pink spongy lobes the instant the empty pocket of the chest cavity is breached.
Burl’s lungs did neither.
The lung lobes remained fully swelled, filling the pleural vault like two inflated, plum-colored bladders of hard man-made leather. The gut-deep lung lining was not smooth and glistening. It was crossed by a dense network of branching, electric-blue striations that followed the paths of the lung arterioles down to the tiny blood vessel beds.
Heseltine leaned down, flicking his jeweler loupes into place with a flick of his scarred knuckle. He extended a yellowed, bare index finger and pressed firmly into the skull lobe.
The tissue didn’t yield. No crepitation whispered from the tiny air pockets. When he lifted his finger, no indentation remained. The parenchyma had turned into an elastomeric solid.
“Non-crepitant throughout all five lobes,” Heseltine muttered. His gravelly voice dropped an octave into cold and exact fascination. “Complete hepatization, but without the cellular sneaking of bacterial lobar pneumonia. Cut the throat pipe, Vance. Let’s see the bifurcation.”
Arthur took up a razor knife with a curved tenotomy blade. With two precise incisions, he freed the larynx from the hyoid rig, clamped the proximal throat pipe with brass metal tongs. Then he peeled the airway downward toward the carina.
He sliced through the gristle rings of the mainstem bronchi. Then, the true sickness revealed itself.
The inside lumen of the bronchioles was not coated in mucus. It was lined with a tiny layer of rainbow-bright blue resin that had polymerized directly against the ciliated breathing epithelium. Tiny cast molds of the lung tree were forming inside the tissue. Every single end-post bronchiole and alveolus had been sealed from within by a hard, glassy polymer casting.
The animal had not drowned in fluid. Its breathing surface had been turned into rigid plastic while its heart was still beating.
“Look at the crystal-forming pattern along the backup septa,” Arthur said. He held the lung margins open with tissue metal tongs. “The polymerization didn’t occur in the pharynx. It occurred at inner body heat. It entered as a vapor or an ingested liquid ester, crossed the tiny blood vessel wall via simple diffusion, and condensed when it contacted body heat.”
Heseltine drew a deep drag from his clove cigarillo. He exhaled a thin stream of gray smoke directly across the opened thorax. The aromatic clove smoke didn’t mask the sour chemical tang rising from the exposed viscera.
“Tissue never lies, boy,” Heseltine rasped, his eyes narrowing behind the thick glass of his loupes. “Aristocrats lie, academic trustees lie, corporate patents lie through their gold-trimmed teeth. But black rot is a total moral truth. This isn’t runoff from the tannery vats, and it isn’t coal-tar pollution.”
The old professor reached into the clean cut, pinched a droplet of the thick, sticky blue gel between his thumb and forefinger. Then he drew it apart. The compound stretched into a fine, semi-clear filament four inches long before snapping back with high elastic memory.
“This is a sped up protein-binding ester,” Heseltine whispered. His jaw tightened until his jawline muscles corded. “Military-grade spark carrier. Designed to force rapid body-energy uptake of heavy peptide hormones in war beasts.”
Arthur stared into the hardened blue maze of the dead hound’s lung. Then, an amber sight aiming cross clicked into sharp posture across his eyes. Clean, razor-sharp monospace letters condensed against the dim light of the pump house:
Arthur’s fingers tightened around the razor knife until his knuckles showed white beneath his skin.
“Town sump runoff,” Arthur read aloud, translating the careful tracking data into spoken words. “It polymerizes between thirty-eight point five and thirty-nine point five degrees. Exactly the normal rectal heat of a healthy canine.”
Heseltine looked up from the carcass, his one good ear cocked toward the rain outside.
“Gate Four drainage,” the professor said grimly. “That channel drains the northern runoff directly below the Ironfang Academy upper breeding paddocks. Someone is dumping defective military surplus into the common gutters, Vance. And if my nose isn’t failing me, this is only the first barrel.”