The bronze threads turned with a dry, metal screech that set Qiao Ming’s teeth on edge.
In the quiet of the High Scroll hall, the sound was unnaturally loud. It echoed off the limestone groin-vaults and scattered into the dark pigeonholes where forty years of his own ledgers rested in dust. He kept both hands firmly clamped on the bronze wrench, applying steady, spinning force across the four-inch width of the end-cap.
One quarter turn. The lead-wire seal ring, flattened by three thousand years of squeezing, snapped with a faint pop. A thin ribbon of crushed lead extruded from the thread relief, curling like a silver shaving against the polished pear-wood bench.
Half a turn. Three-quarters.
At the completion of the second full revolution, the seal broke.
A sharp, inward hiss of air cut through the room. The negative pressure within the metal tube, preserved since the First Epoch, drank the surrounding air of the writing hall with a thirsty, sibilant gasp that caused the animal fat lamp flames to flicker and lean toward the bronze lip.
Right away, an invisible plume of ancient gas swelled into the room.
It was the air of an unburied world. Dry, cool, smelling faintly of bitter pine-resin wood, sun-cured flax. The crisp, clean ozone of high mountain plateaus before the clouds had darkened and the sky waters had drowned the heavens. Qiao Ming drew the breath deep into his lungs. The contrast with the rotten-egg, methane-heavy damp of the lower drain tubes was…
