The chalk heel of the automaton in Seat #044 bit into the dry oak grain.
A sharp, high-frequency hiss cut through the Study Hall. The sound was thin, dry, and piercing, like a fingernail drawn across a rough slate blackboard.
On the central pillar, the Bogen decibel meter jumped:
28.6 dB... 28.9 dB... 29.1 dB.
Overhead, forty feet in the gloom, the bronze suspension housing emitted a heavy, metallic click. The mechanical safety pawl slipped from its cog. The twenty-foot curved crescent blade of the pendulum guillotine dipped two inches, its braided steel guide wires singing with raw spring tension.
“Julian!” Elena whispered, her teeth clenched tight behind pale lips.
“The suspension solenoid just disengaged! We’re at point-nine overhead!”
“Don’t strike them,” Julian commanded in a fierce, low murmur. “If you smash a wooden joint, the impact crack will hit fifty-five decibels.
