A small horse-drawn wagon containing four men set off, entering the flow of traffic over Cockscomb Bridge and winding up towards the centre of Spit Hearth. They made their way without urgency, turning onto the wide, banyan-lined Boulevard St. Dragonne. They swayed with a muted clacking along the wooden slats that paved the street: the legacy of the eccentric Mayor Waldemyr, who had objected to the cacophony of wheels on stone cobblestones past his window.

The driver waited for a break in the traffic, then turned to the left and into a small courtyard. The boulevard was invisible, but its sounds were still thick around them. The cab stopped by a high wall of rich red brick, from behind which rose an exquisite smell of honeysuckle. Ivy and passionflower sprouted in little bursts over the lip of the wall, bobbing above them in the breeze. It was the garden of the Vedneh Gehantock monastery, tended by the dissident cactacae and human monks of that floral godling.

The four men leapt down from the cart and began to unload tools and the bales of heavy cable. Pedestrians walked past them, watched them briefly and forgot them.

One man held the end of the cable high against the monastery wall. His workmate lifted a heavy iron bracket and a mallet, and with three quick strokes he had anchored the end of the cable into the wall, about seven feet above the ground. The two moved along, repeated the operation eight or so feet further to the west; and then again, moving along the wall at some speed.

Their movements were not furtive. They were functional and unpresuming. The hammering was just another noise in the montage of city sound.

The men disappeared around the corner of the square and moved off to the west. They dragged the huge bail of insulated wire with them. The other two men stayed put, waiting by the tethered end of the cable, its copper and alloy innards splaying like metallic petals.

The first pair took the cable along the twisting wall that dug inwards through Spit Hearth, around the backs of restaurants and the delivery entrances to clothing boutiques and carpenters’ workshops, towards the red-light zone and The Crow, the bustling nucleus of New Crobuzon.

They moved the cable up and down the height of the brick or concrete, winding it past stains in the wall’s structure, and joining twisting skeins of other pipes, gutterings and overflows, gas pipes, thaumaturgic conductors and rusting channels, circuits of obscure and forgotten purpose. The drab cable was invisible. It was one nerve fibre in the city’s ganglions, a thick cord among many.