Chapter 27: The Winter of the Wire

The winter of 1829-1830 settled over the Titteri highlands with a dark, freezing
intensity that felt like a quiet breath before a storm. The snows of December
were the heaviest Amine's men had yet seen, burying the macadam roads under
three feet of white drifts and locking the high ridges in a silent, icy
isolation.

But inside the stone walls of Bordj Hamza, the workshops were warm, heated by
the steady, humid breath of the Cornish steam engine's exhaust pipes. And in the
center of the lathe-house, a new, strange machine was humming a high-pitched,
metallic song.

It was the wire-drawing bench.

Amine stood by the long wooden table of the bench, his hand guiding a thin,
sparkling strand of copper wire that was being drawn through a hardened steel
plate.

"A scout on a horse is too slow, Yusuf," Amine said, his voice quiet over the
hum of the steam-driven winch that pulled the wire. "And in the middle of a
battle, when the dunes of Sidi Fredj are covered in the black smoke of our
cannons, even the optical telegraph towers on the peaks will be blinded. If we
cannot communicate with our redoubts instantly, our defense will be like a body
whose nerves have been cut. We need the Silk al-Kahraba'—the Electric Wire."

Yusuf stood by the bench, his fingers tracing the cold, thin copper.
"Electricity, Sidi? I have seen the physicians in Algiers use the brass jars to
make the muscles of dead frogs twitch. But how can a spark carry a warning
through thirty miles of mud?"

"It does not carry a spark, Yusuf," Amine said, his mind projecting the physical
principles discovered by Hans Christian Ørsted in 1820 and refined by
André-Marie Ampère. "It carries a current. If we connect a zinc-and-copper
battery at this fort to a long, continuous wire of copper that runs through the
mountain passes to the coast, we can send an electric current along the metal at
the speed of light."

He pointed to a small, delicate instrument that sat on his workbench—a needle
telegraph.

"At the far end of the wire, the current will pass through a small coil of
copper wire wound around a steel needle," Amine explained. "The electricity will
create a magnetic field, causing the needle to deflect to the left or the right.
By opening and closing the brass key here at the fort, we can make the needle at
the other end click against two small bronze bells—a high note for a short
pulse, a low note for a long one. We can write our messages in the air, and they
will be read thirty miles away in a fraction of a second."

"But the wire is bare, Sidi," Lounes said, entering the room with a basket of
charcoal. "If it touches the wet sand of the beach or the damp clay of the
passes, the electricity will escape into the earth. The signal will die before
it reaches the gate."

"That is why we must insulate it," Amine said.

He showed Lounes the insulation machine—a specialized spinning frame he had
built next to the draw-bench.

"We cannot use the rubber of the Amazon, as the French blockade has cut off our
imports," Amine said. "But we have a better, more robust solution. The copper
wire will be passed through this machine, which will double-braid it with two
layers of thick, strong silk thread from the weavers of Tlemcen. Then, the
wrapped wire will be drawn through a hot, boiling bath of our new insulating
varnish."

He pointed to the steaming copper vat at the end of the bench.

"The varnish is a mixture of boiled linseed oil, melted yellow beeswax, and
refined pine tar from the Atlas forests. When it cools, it forms a flexible,
waterproof, highly insulating jacket around the copper. It will resist the acid
of the soil, the salt of the sea-spray, and the weight of the damp earth. We can
bury it two feet deep in the sand, and the current will remain locked inside the
wire."

The manufacturing of the telegraph wire was a monument to winter endurance.

For six weeks, the steam-driven draw-bench ran twenty-four hours a day, drawing
thick copper rods from the Soummam mines through successively smaller tapered
holes in the hardened tool-steel plates. The copper had to be annealed—heated to
a dull red in the charcoal furnace and cooled slowly—after every three draws to
prevent the metal from becoming brittle and snapping inside the dies.

By the middle of January 1830, they had manufactured forty miles of perfect,
double-insulated copper wire.

The wire was wound onto twenty large wooden reels, each containing two miles of
the black, tar-scented cable, designed to be carried on the backs of the Khayala
horses or mounted on the rear of the freight wagons.

The battery they built to power the line was a Cruickshank trough battery—a long
wooden box lined with sheet-lead, divided into fifty small compartments. Each
compartment held a plate of zinc and a plate of copper, immersed in a weak
solution of sulfuric acid. It was a simple, robust design, capable of producing
a steady, high-voltage current for weeks without needing maintenance.

"The code is simple, Yusuf," Amine said, sitting at his desk with a small brass
key.

He tapped the key.

Click... clack... click.

"We do not need to spell every word," Amine said. "We will use the same
numerical codebook we designed for the optical telegraph. A series of short and
long clicks will indicate the page and the line—three short clicks for page
four, two long clicks for line twelve. The operators at the redoubts will be
able to read our commands as fast as we can write them."

The testing of the electric wire was conducted during a heavy blizzard in early
February.

Yusuf led a squad of ten Khayala riders out through the northern gate, their
horses carrying four of the heavy wooden wire-reels on their pack-saddles. As
they rode toward the high pass of Tizi N'Ait Aicha, three miles away, the black
wire unreeled behind them, sinking into the soft, white snow of the trail.

Amine remained in the gatehouse of the fort, his hand resting on the brass key
of the trough battery. Beside him, Meziane watched the receiver—the small,
glass-cased needle galvanometer suspended between two bronze bells.

For two hours, there was silence in the room, the only sound the howling of the
wind outside the stone walls and the steady ticking of the water-clock.

Then, the needle moved.

Clink.

The needle swung to the left, its steel tip striking the high-toned bronze bell.

Clink... clank... clink.

Meziane's pencil flew across his paper notebook, writing down the numbers as the
needle clicked through its geometric dance.

"First signal," Meziane said, his voice trembling with a sudden, overwhelming
excitement. "Page fourteen. Second signal: line six."

Yusuf's finger ran down the column of the codebook. He looked up at Amine, his
eyes bright.

"The message is from Yusuf, Sidi," Meziane read. "He has reached the pass. The
temperature is ten degrees below freezing, the snow is three feet deep, but the
wire... the wire is speaking. He says: 'The line is clear. We are ready.'"

Amine pressed his key, sending a rapid, alternating current back along the wire
to confirm the receipt.

The signal traveled through the three miles of freezing snow, through the wet
clay of the ravine, and reached the pass in less than a millisecond—a speed that
turned the vast, rugged barrier of the mountains into nothing.

He stood up, walking to the window that looked out over the frozen valley. The
white snow was falling in dense, silent sheets, but beneath that white blanket,
the black, tarred wire of his telegraph lay warm and active, connecting his fort
to the border.

"We have conquered time, Yusuf," Amine whispered to the empty room. "And we have
conquered the storm. Let the French sail. They will find that we are no longer a
divided land of mountains. We are a single, coordinated mind of iron, silver,
and wire."