Weight of the Wagon

How many seconds would it take for a loaded timber cart to shear through two inches of unsupported sandstone once the resonance beneath it died?

Hayes Carver adjusted the thick leather wrap around his right forearm, testing the blistered skin where the hot antimony sludge had scorched him an hour earlier. The pain was clean and sharp, which meant the burn was shallow enough not to rot, but his fingers were stiff on the manganese trace-chains. Fifty yards ahead, the entrance to the Devil's Throat canyon rose like a split tooth against the starless night, black and dead. The deep, soothing thrum that should have hummed through the soles of his boots was completely gone. In its place, the cold air carried only the dry scraping of desert scrub and the faint, rhythmic clicking of desert predators stalking the caravan's unshielded flank. Hayes wanted the entire train anchored dead in the dirt until he could scale the western rim on foot to find where the saboteur had set the drop-charges.

"We cannot sit here like tethered calves, Carver," Fiona Brackett said, her boots crunching sharply on the roadbed as she walked up from the second wagon. She wore her buff-leather coat buttoned to the throat, a heavy repeating arbalest slung across her chest. Two of her hireling guards flanked her, lanterns hooded down to thin slits of yellow light. "The rear teamsters are already sighting scrub-stalkers in the brush. If we stay bunched in the wash until dawn, the pack will test our wheel-lines."

"The scrub-stalkers will only nip at the draft mules if they get inside the torch circle," Hayes replied, his voice low and level. He did not turn away from the dark gorge. Behind him, Brisket sat on his haunches, his heavy, slate-scaled tail sweeping the packed gravel in slow, rhythmic arcs. The hound’s breath smelled of slaked lime and cooling iron, his digestive furnace recovering its steady rhythm after the purge. "The man who drilled those boreholes in the culvert is up on those cliffs right now. He knows the resonance is dead. He knows the vibration of steel-shod wheels on fractured stone will bring the ceiling down on us."

"You found chemical grit in your hound’s vomit, Carver. You did not find an army." Fiona stopped beside him, squinting into the throat of the pass. Her jaw was set in that rigid line Hayes had come to recognize whenever profit and delay balanced on the ledger. "The Red Kiln garrison is twelve miles behind us. The pass is only four hundred yards long. If we punch the light scout wagon through the gap, we secure the northern egress and plant the signal flares on the high bank. We do not starve in the ditch because an unmapped fissure gave your beast a colic."

"It was not an unmapped fissure," Hayes said, lifting the charred chunk of core-slag wrapped in heavy lead sheet from his belt. "He used a diamond bit. The boreholes are set to drop thirty tons of cap-rock the second weight hits the center span. Send a wagon in there, and you are pulling the tripwire yourself."

Fiona waved one gloved hand toward the head of the convoy. "Tolliver is already hitched. Two mules, light timber bed, eight hundred pounds of grain and wheel spares. If the road takes the light wagon, it will take the freight. If the shelf is weak, Tolliver can throw the trace-hook and back the team out before the rear wheels clear the curb."

"Tolliver is a teamster, Brackett, not a mountain goat," Hayes said. "The rock in that throat is honeycombed with antimony acid. It will not crack slow. It will drop out from under the hubs before he hears the stone groan."

"We move," Fiona said, her tone snapping shut like an iron lock. "Tolliver! Take the lead. Keep your team at a steady walk. Slit lanterns only, and watch the cliff overhang for loose shale."

From the head of the line, a lean driver with a ragged woolen cap lifted his whip-stock in acknowledgment. The two gray draft mules strained against their collars, iron shoes striking dull sparks against the unresonant highway as the light wagon lurched forward.

Hayes cursed under his breath, his blistered hand tightening on Brisket’s heavy manganese collar. "Stay down, boy," he muttered. "Keep your weight centered."

Brisket gave a low, questioning chuff, the thick plates along his neck clicking like shale slabs as he watched the scout wagon roll away from the safety of the perimeter. The hound smelled the deadness of the road just as clearly as Hayes did; every three paces, Brisket’s nostrils flared, testing the updraft from the canyon for the bitter, vinegar tang of antimony solvent.

Tolliver handled the team with practiced restraint. The wagon rolled past the canyon's outer spur, twenty paces into the throat. The high sandstone walls closed in on both sides, swallowing the faint glow of the convoy’s lanterns. The only sound was the hollow rattle of ash-wood spokes and the steady, dry scrape of iron tires over the ancient paved surface.

Then the highway failed.

There was no preliminary shower of gravel, no warning creak of splitting timber. Twenty-five yards into the bottleneck, a fifteen-foot section of the outer highway shelf simply detached from the canyon wall along a clean, bored fracture line. The roadbed split with a sharp sound like a cannon shot in an enclosed courtyard.

The left side of the road plunged into the thirty-foot dry wash below, taking the left wheel of the scout wagon with it.

The near-mule shrieked, its rear legs kicking into empty air as the road disintegrated beneath its hooves. The animal's sheer panic snapped the leather trace on the left harness, sending the beast tumbling down the sandstone chute into the darkness below, where it struck the dry boulders with a wet, sickening crack. The off-mule lunged forward onto the remaining ledge of stone, thrashing against the yoke as the loaded timber cart tilted hard to the port side, its rear axle hung up entirely on a jagged spur of unsupported bedrock.

"Hold the brake!" Fiona yelled from the canyon mouth, raising her arbalest as if she could shoot the cliff into staying upright. "Tolliver, cut the trace!"

Tolliver was not cutting anything. The sudden violent list had thrown him across the driver's box, pinning his left leg beneath two shifting sacks of barley and the heavy oak toolbox. He was hanging half out of the canvas hood, clawing at the tilted buckboard while thirty feet of sheer empty air yawned directly beneath his face.

"Carver!" Tolliver screamed, his voice cracking with sheer terror. "The bed is slipping! The whole shelf is going!"

Beneath the pinned rear axle, the fractured stone was weeping clouds of dry, powdery dust. Small chunks of limestone clattered into the wash in a steady, accelerating rhythm. The remaining mule was choking on its collar, its hooves sliding on the slick, un-resonant stone, dragging the front axle two inches closer to the abyss with every desperate heave.

Hayes did not shout. He did not look at Fiona. He moved with the cold, measured speed of a handler whose life depended on gear ratings and leverage.

"Brisket, to me!" Hayes snapped, sprinting toward the canyon mouth.

The Scale-Hound lunged forward in an instant, his heavy clawed pads gripping the stone with flint-hard certainty. Hayes reached the edge of the fracture zone within four seconds, his boots skidding to a halt on the solid stone three yards back from the shearing edge.

The wagon was balanced on three points: the off-side front wheel, the tongue wedged into the thrashing mule's harness, and the manganese-banded rear axle-hub, which was grinding into a shelf of sandstone no thicker than a man’s forearm. The whole loaded timber box was trembling. Every time the pinned mule bucked, the hub slipped another quarter of an inch toward the drop.

"Fiona! Put a bolt through that remaining mule's head right now!" Hayes barked without looking back. "If it thrashes again, it pulls the tongue and dumps the whole box!"

Fiona did not hesitate. The heavy arbalest snapped, the steel bolt taking the frantic draft mule cleanly behind the ear. The beast dropped like a felled tree, its weight slumping onto the remaining solid ledge and arresting the forward surge of the wagon tongue.

"Tolliver, stop kicking!" Hayes commanded, his voice cutting through the driver’s panic like a cold chisel. "You kick those grain sacks, you shift the ballast. Keep your hands on the box rail and breathe."

Hayes dropped to one knee, unhooking the heavy manganese drag-chain from Brisket’s harness and shackling it to the long steel recovery line. The tackle was rated for eight tons of dead pull, forged with heavy, square links that did not stretch under shock-load. But Hayes had no winch, no capstan, and no time to set a ground-anchor into the dead highway stone.

He had Brisket.

"Listen to me, boy," Hayes said, his hands moving with rapid precision as he threaded the master hook through the heavy iron shackle of the wagon’s rear carriage-tree. "We take the load at an angle. If you pull straight back, the shearing lip breaks and takes your paws with it."

Hayes backed away from the lip, dragging the chain at a forty-degree angle toward the inner wall of the canyon where the bedrock remained thick and unbroken. He threw the heavy toggle-link through Brisket’s front chest-plate, locking the forged manganese ring against the hound’s forward breast-harness.

"Down low," Hayes ordered, pressing his blistered palm against the back of Brisket’s scaly neck. "Dig the rear spurs. Do not surge. Lean into the breast-strap."

Brisket dropped his center of gravity until his belly scales grazed the roadbed, his broad, four-toed rear feet locking their black obsidian talons into the micro-fissures of the bedrock. The hound let out a deep, rasping growl, the heat inside his throat chest glowing a dull, cherry red through the seams of his neck plating.

"Tolliver! On three, grab the top stay!" Hayes shouted. He grabbed an eight-foot ash pry-bar from his own utility sling, jamming the wedge-end beneath the wagon’s hung axle-hub to serve as an artificial fulcrum. "Brisket... heave!"

The hound set his shoulders and dug in.

The manganese chain snapped taut with a sound like a plucked iron harp string. Dust exploded from beneath Brisket’s rear claws as seven hundred pounds of armored muscle strained against a ton of dead, tilted timber and grain. The hound’s throat furnace roared, an intense wave of sulfur-and-charcoal heat washing over Hayes’s face as the beast threw his entire mass into the harness.

The wagon did not move.