“Bloody Gurkish fire!” Cosca cursed as they gave another roaring blaze a wide berth. “Ten years ago no one had dreamed of using that stuff as a weapon. Then they made Dagoska an ash-heap with it, knocked holes in the walls of the Agriont with it. Now no sooner does a siege begin than everyone’s clamouring to blow things up. We liked to torch a building or two in my day, just to get things moving, but nothing like this. War used to be about making money. Some degree of modest misery was a regrettable side effect. Now it’s just about destroying things, and the more thoroughly the better. Science, my friend, science. Supposed to make life easier, I thought.”

Lines of sooty soldiers tramped by, armour gleaming orange with reflected flames. Lines of sooty civilians passed buckets of water from hand to hand, desperate faces half-lit by the glow of unquenchable fires. Angry ghosts, black shapes in the sweltering night. Behind them, a great mural on a shattered wall. Duke Salier in full armour, sternly pointing the way to victory. He had been holding a flag, Friendly thought, but the top part of the building had collapsed, and his raised arm along with it. Dancing flames made it look as if his painted face was twitching, as if his painted mouth was moving, as if the painted soldiers around him were charging onwards to the breach.

When Friendly was young, there had been an old man in the twelfth cell on his corridor who had told tales of long ago. Tales of the time before the Old Time, when this world and the world below were one, and devils roamed the earth. The inmates had laughed at that old man, and Friendly had laughed at him too, since it was wise in Safety to do just as others did and never to stand out. But he had gone back when no one else was near, to ask how many years, exactly, it had been since the gates were sealed and Euz shut the devils out of the world. The old man had not known the number. Now it seemed the world below had broken through the gates between again, flooding out into Visserine, chaos spreading with it.

They hurried past a tower in flames, fire flickering in its windows, pluming up from its broken roof like a giant’s torch. Friendly sweated, coughed, sweated more. His mouth was endlessly dry, his throat endlessly rough, his fingertips chalky with soot. He saw the toothed outline of the city’s walls at the end of a street strangled with rubble.

“We’re getting close! Stay with me!”

“I… I…” Friendly’s voice croaked to nothing on the smoky air. He could hear a noise, now, as they sidled down a narrow alley, red light flickering at its end. A clattering and clashing, a surging tide of furious voices. A noise like the great riot had made in Safety, before the six most feared convicts, Friendly among them, had agreed to put a stop to the madness. Who would stop the madness here? There was a boom that made the earth shudder, and a ruddy glare lit the night sky.