Thorn paused, checking his palm-com. ‘Just received a map.’ He turned, scanning around. ‘The crowds are too thick here. We need to go that way.’ He led the way to a closed maintenance door, which clunked and rumbled as he approached and slowly swung open. Next, a gantry alongside a sheer steel cliff beside which welding robots rose like the front ends of giant beetles with their wing cases and abdomens chopped away. The gantry widened into a fenced semicircular platform fronting a wide roller door for transferring heavy equipment. The door was jammed. Before Thorn could even speak, Scar fired his proton weapon into the ridged metal surface. In viridian fire, most of the door slewed away like foil in an acetylene flame. They ducked through, avoiding a small sleet of hot metal from one still-burning edge.

Narrow accessways. More doors. Corpses strewn across a deck where heavy robots stood on gecko-stick caterpillar treads; their owlish metallic heads bowed over multi-jointed arms for handling and cutting foam-stone and sheet construction materials. The dracomen spread out, checked the bodies.

‘No Jain,’ observed Scar.

They were just citizens ripped apart by rail-gun fire. Thorn guessed he would probably never know what had happened here, but he filed away the fact that dracomen could tell by the merest touch whether someone contained Jain tech.

Further access ways, then down into a small monorail station where a single carriage of one train awaited them. They climbed aboard and it smoothly accelerated away. Past them from the opposite direction came a seemingly endless train packed with people, their faces pressed against windows. Thorn’s team left their carriage when it stopped briefly to let them off by a maintenance tunnel a few hundred yards around the bend from a busy station. Thorn could not see the crowds waiting there, but their sound was a constant roar. Before he and the dracomen were even out of sight of the line, another train returned along the maglev track, their own carriage at its head, and now crammed full of humanity.

A stair from the tunnel eventually gave them access into a public corridor, along one side of which hothouse porches, lit with sun lights and crammed with foliage, led to private homes. Down the maintenance ladder of an inoperative drop-shaft, then along a gantry suspended above an autofactory. Below them monolithic machines conveyed ceramal casings to each other, hissing and reconfiguring themselves, cold-forging metal, electron-beam welding, inserting components in flickering blurs of hydraulics, spinning bright new metal and passing the casings on. Thorn noted exit shafts, like those out of some hive, through which departed floating lines of the leaf-shaped drones those casings had become: bare-metal, utile, armed. Coloron’s war industry was at full production, but the businesses of killing and destroying were easy. Concurrently, the AI’s logistical nightmare of trying to move its citizens out of the way was akin to pouring a bag of flour through the eye of a needle.