And yet it had lasted; it had lasted for more than two years now. Sitting in September sunshine on this balcony outside the Crumple Zone, one of the many coffeehouses on Airhaven High Street, Hester found herself beginning to believe that it might last for ever. She squeezed Tom’s hand beneath the table and smiled her crooked smile, and he looked at her with just as much love as when she first kissed him, in the fluttering light of MEDUSA on the night his city died.

Airhaven had flown north this autumn, and now hung a few thousand feet above the Frost Barrens, while small scavenger towns that had been up on the ice during the months of the midnight sun clustered below it to trade. Balloon after balloon rose to moor at the docking struts of the flying free-port, disgorging colourful Old-Tech traders who started shouting their wares the instant their boots touched its lightweight deckplates. The frozen north was a good hunting ground for diggers-up of lost technology, and these gentlemen were selling Stalker parts, Tesla gun accumulators, nameless odds and ends of machinery left over from half a dozen different civilizations, even some pieces of an Ancient flying machine which had lain undisturbed in the High Ice since the Sixty Minute War.

Below them to the south, the east and west, the Frost Barrens stretched away into the haze; cold, stony country where the Ice Gods ruled for eight months of the year, and where patches of snow already lay in the shady bottoms of the criss-cross town-tracks. Northwards rose the black basalt wall of the Tannhauser Mountains, the chain of volcanoes which marked the northernmost limit of the Great Hunting Ground. Several were erupting, their plumes of grey smoke like pillars holding up the sky. Between them, faint behind a veil of ash, Hester and Tom could just make out the world-wide white of the Ice Wastes, and something moving there, vast, dirty and implacable, like a mountain gone rogue.