Wavelengths of Treason

The amber flash cut across five degrees of pitch-black vacuum, striking the frozen bronze rim of the pier before any warning bell on the bastion could chime.

Baltasar did not reach for his pistol. He drew the heavy brass vernier glass from his coat, planting his boots into the rime-slick grating of the lower berth. Through the circular lens, the distant spark fractured into distinct chromatic pulses. Long, short, double-pulse, hold. It was not the wide lantern sweeping of a merchant vessel lost in the drift. It had the clean, razor-sharp focus of an optical shutter running off a high-grade phosphor lantern.

"Varas," Baltasar said, his voice flat under the roar of the atmospheric venting ducts. "Bring the slate. Mendoza, get the quadrant."

The midshipman scrambled across the dock planking, unhooking a chalk slate from his utility harness. Mendoza jogged down the gangway of the San Fernando, wiping black grease from his cuffs with a piece of waste cloth. The old gunner squinted into the outer dark, his breath puffing in faint gray clouds that dissolved into the station's thinned air.

"No merchant ever bought glass ground that fine," Mendoza muttered, setting the heavy brass quadrant onto the iron stanchion with a dull clank. "That's high-tier naval telegraphy. Crown Vanguard or the Siege Corps."

"Crown ships do not cruise the dead vectors without filing sail-plans with the bastion," Varas said, slate balanced on his knee. "Should I signal Watch-Commander Galvão's sentries to acknowledge?"

"No," Baltasar said. "If the redoubt takes the flash, Mireia logs it in the imperial manifest, and the protocol forces a lock on all private receivers. Let the fortress sleep. Read the beam to me."

The amber light pulsed in rapid, rhythmic sequences.

Six-four-zero nanometers. Vector three-one-seven.

Baltasar turned the vernier dial with gloved thumbs, adjusting the prism until the light split into measurable fringes against the hairline grid. "First cipher group: three longs, four shorts, followed by an eight-beat pause. Record it."

Varas scratched the numbers into the slate with white chalk, his hand trembling slightly against the frost. "That's the third-rank maritime code. The fleet encryption from four cycles ago."

"Someone is transmitting on an obsolete key," Mendoza remarked dryly, adjusting the quadrant's plumb line. "Either our friends in the core have run out of new codes, or someone out there wants a very specific set of ears to catch it. Salt beef usually rots before signal books do, but the Admiralty finds a way to ruin both."

Baltasar tracked the shifting intensity of the beam. "It is an unmasked optical pulse. It bleeds light into the cold plane. Whoever sits at that shutter is burning their own slipstream reserves to throw this across forty leagues of dead space."

The beam shifted from amber to a sharper, pale violet before settling back into amber. A signature flicker.

"Telemetry header," Baltasar said, watching the vernier scale align. "Transmitter ID: Light-Catcher Flotilla, Survey Vessel Numancia. Operator signature... Cestari. Signal-Officer Elvira Cestari."

"The cartographers?" Varas looked up from the slate, chalk suspended over the wet slate. "The telemetry corps withdrew behind the inner shelf two moons ago. Why would a survey boat drift alone in Sector Siete's wake?"

"Keep writing," Baltasar commanded. "Next sequence."

The pulses came faster now, the cadence jagged, carrying the physical hesitation of an operator working manual levers against failing pressure. Baltasar read each stroke as the prism divided the light:

To all sovereign outposts on the Periphery Shelf. Disregard Admiralty Directive Nine. Crown Fleet First Line under Admiral De la Cerda has diverted full propellant reserves from civil ring-settlements. Strategic mandate: Light Harvest. Repeat: Light Harvest.

Varas’s chalk stopped. The boy stared at the letters scrawled across the black slate. "Light Harvest? That is an emergency recovery term for decommissioned hulks."

"Keep recording," Baltasar said, his jaw tightening as the cold began to bite through his leather gloves.

First Line galleons entering auroral corridor twenty leagues trailing your position. Objective: immediate suppression of Border Bastion defenses. Commandeer all atmospheric condensers, siphon deep-storage black powder, and collapse local slipstream pocket to accelerate core retreat. No garrison evacuation authorized. You are marked as expendable ballast.

The signal ended abruptly. The distant point of light dimmed, flared once in a desperate violet bloom as the shutter released its final charge, and vanished into the starless void.

Silence settled over the lower docking trench. The only sound was the distant, rhythmic hum of the bastion’s air scrubber and the creak of the San Fernando straining against its hemp moorings.

Mendoza spat over the edge of the pier, watching the saliva freeze before it fell into the abyss. "Well. That explains why the supply lighters never came."

"It has to be a deception," Varas stammered, holding the chalk slate against his chest as if the stone itself were burning his fingers. "A transmission from an unverified vessel, operating on an obsolete key. It could be an interloper ploy to force us to abandon the bastion without firing a single round."

"Look at the telemetry coordinates," Baltasar said. He pointed the vernier glass at the quadrant's markings. "Vector three-one-seven. That is the exact drift angle of the slipstream current coming down from Sector Siete. If the Crown Fleet is riding that heading under full chromatic drive, they are not sailing to reinforce us. They are riding the dying light-tide to sweep the board clean."

He took the slate from the midshipman's hands, looking down at the stark white characters. The mathematics lined up with brutal precision. The refugee carrack he had boarded hours earlier was not an isolated casualty of war; it was the vanguard of a systemic abandonment. The Crown was not losing the outer sectors. The Crown was actively harvesting them, draining the powder and the atmospheric light from the frontier to fuel an insulated sanctuary in the core.

"Flag-Lieutenant," Mendoza said, his voice stripped of its earlier wryness. "Our lower battery is down to three barrels of rough blasting mix, one cracked gun housing, and half a crew breathing thin air. If De la Cerda's first-raters drop anchor off that reef, they won't even need chromatic shot. They will starve us out by closing the air vents."

"They will take the station's deep powder stores first," Baltasar said.

"What stores?" Mendoza scoffed. "Mireia told you her magazines were running dry."

Baltasar looked up toward the towering bulk of the central citadel. The iron bastions rose like black teeth against the faint green sheen of the upper aurora, their searchlights sweeping lazily across empty space.

"Mireia believes what her quarterly manifests tell her," Baltasar said. "She defends this dock because she thinks the law still holds on both ends of the channel. She does not know she has been posted over an open grave."

"If we sound general quarters based on an unsanctioned signal," Varas whispered, "the Admiralty will hang us from the yardarm for mutiny before the first Crown sail even breaks the horizon."

Baltasar wiped a smear of frost from the vernier's brass tube and slid the instrument back into his heavy coat. For thirty years, his service had been defined by the weight of the sovereign commission pinned to his lapel—thirty years of cold decks, scorched gun-ports, and blind obedience to an empire that measured human lives by the gallon of breathable air.

That debt was paid.

"Let them bring the rope," Baltasar said. He took the chalk slate under his arm and stepped onto the iron stairs leading up to the redoubt. "Varas, tell Reyes to keep the boarding parties armed at the gangway. Mendoza, lay the fuses on the three barrels we took from the yard."

"Where are you going, sir?" Varas asked.

"To see the Watch-Commander," Baltasar said, his boots ringing hard against the frosted metal steps. "We are going to teach her the new law of the void."