There were cities on the coast here, substantial ports that now brooded within the remains of walls. The travellers avoided these places. Instead they stayed a few nights in smaller villages, where the local people survived by fishing. They were welcomed, if warily; few travellers came this way any more, it seemed. Pyxeas said this was the pattern of the future in the coming longwinter, ‘when no man will venture more than a day or two’s travel beyond his home village, the rest of the world forgotten’.

In such places Avatak stared hungrily at the ocean. Somewhere beyond, far to the west, lay his own home. Though there was no sea ice, on clear days he saw splinters of white on the grey, surging water. Icebergs, drifting from the north.

On the travellers passed, moving inland. It was clear the country had changed greatly. This land had recently been forested, with tremendously tall and old oak trees. Now the remaining trunks stood barren. Though the spring was advancing they rarely saw a splash of green, a new leaf or a fresh shoot. And in places there was evidence of tremendous fires, whole landscapes reduced to ash and blackened stumps.

Pyxeas said the culprit was the climate, once again. ‘This is how forests die. Avatak, remember how we smelled the northern forests burning, all the way across Asia? And remember what we saw in Daidu? When you burn a tree it is like opening a tremendous bottle of fixed air, all at once! Imagine how much has been released in these vast conflagrations . . .’

They saw few people – fewer, if anything, than in Ibera – and those they did spot, always on the move, stayed well away from what must have looked like a well-armed party. They passed through clearings in the forest, cut into the woodland and connected by broad tracks, a little like Northland’s communities. These settlements were abandoned, ransacked, burned out. In one place they found a gallows set up over the central hearth, with the remains of a human body suspended upside down over the ash. Nelo sketched the gruesome scene, and he cut down the corpse with a swipe of a sword, and buried the remains in the hearth.

Further north the country changed again, becoming more open. The air was much wetter now, colder, and rain was more frequent, even sleeting sometimes, though, as they kept reminding each other, this was summer. There was extensive flooding, much of what must have been farmland turning to marsh, the walls of long-abandoned farmhouses dissolving into the wet. There were none of the bright flowers Avatak remembered from similar seasons in Northland, but flocks of birds settled almost experimentally on the new wetlands. It grew steadily colder. Soon they found themselves pushing through flurries of fresh snow, the horses wheezed and dropped their heads as the wet stuff flecked their fur, and in the mornings they would wake to frost.

‘We’re walking into winter,’ Himil said, amazed.