They had rested, cleaned the nightsoil from their clothes as much as they could. Here, finally, Isaac had tended the stub of Derkhan’s ear. It had numbed, but was still painful. She bore it with heavy reserve. Isaac and Lemuel had fingered their own scarred remnants uncomfortably.

As the night had crept up faster, Isaac had readied himself to go. The argument had erupted again. Isaac was resolute. He needed to see Lin alone.

He had to tell her that she was in danger as soon as the militia connected her to him. He had to tell her that her life as she had lived it was over, and that it was his fault. He needed to ask her to come with him, to run with him. He needed her forgiveness and her affection.

One night with her, alone. That was all.

Lemuel would not acquiesce. “It’s our fucking heads too, ’Zaac,” he had hissed. “Every militiaman in the city is after your hide. Your helio’s probably pasted up in every tower and strut and floor of the Spike. You don’t know how to get around. Me, I’ve been wanted all my working life. If you go for your ladybird, I come.”

Isaac had had to give in.

At half past ten, the four companions had wrapped themselves in their ruined clothes, obscuring their faces. After much coaxing, Isaac had finally been able to goad the construct into communication. Reluctantly and torturously slowly, it had scratched out its message.

Griss Twist Dump number 2, it had written. Tomorrow night 10. Leave me below arches now.

With the darkness, they had realized, came the nightmares. Even though they did not sleep. The mental nausea, as the slake-moth dung polluted the city’s sleep. Each of them grew tetchy and nervous.

Isaac had stashed his carpet bag, containing the components of his crisis engine, under a pile of wooden slats in the shack. Then they had descended, carrying the construct for the last time. Isaac hid it in an alcove created where the structure of the railway bridge had crumbled.

“Are you going to be all right?” he asked it tentatively, still feeling absurd talking to a machine. The construct did not answer him, and eventually he had left it. “See you tomorrow,” he said as he left.

The criminal foursome skulked and stalked their clandestine way through New Crobuzon’s burgeoning night. Lemuel had taken his companions into the alternative city of hidden byways and strange cartography. They had evaded streets wherever there were alleys and alleys wherever there were broken channels in the concrete. They had crept through deserted yards and over flat roofs, waking the vagrants who grumbled and huddled together in their wake.