The hills ahead formed a spine, a feature on the land that he suspected showed up only on local maps. There were no farms on the lowlands before it, no herds on its broken slopes.

The T’lan Imass had reappeared in this place before him, though their passage onwards, into those hills, left no sign, for decades had passed in this world since that time. He was on the edge of the Jhag Odhan.

Dusk had arrived by the time he reached the foothills and began making his way up the weathered slope. The exposed rock here had a diseased look, as if afflicted by some kind of unnatural decay. Pieces of it collapsed under his feet as he climbed.

The summit was little more than a ridge, less than three paces across, crusted with rotten stone and dead grasses. Beyond, the land fell away sharply, forming a broad valley marked by sunken, banded sandstone mesas rising from its base. The valley’s opposite side, five thousand or more paces distant, was a sheer cliff of rust-coloured rock.

Karsa could not imagine the natural forces that could have created such a landscape. The mesas below were born of erosion, as if floods had run the length of the valley, or perhaps fierce winds roared down the channels – less dramatic and demanding much greater lengths of time. Or the entire valley could have once stood level with the surrounding hills, only to suffer some subterranean slump. The decayed outcroppings suggested some kind of leaching process afflicting the region.

He made his way down the steep slope.

And quickly discovered that it was honeycombed with caves and pits. Mines, if the scree of calcreted rubble fanning out from them was any indication. But not tin or copper. Flint. Vast veins of the glassy brown material lay exposed like raw wounds in the hillside.

Karsa’s eyes narrowed on the mesas ahead. The bands in the sandstone were all sharply tilted, and not all at the same angle. Their caps displayed nothing of the flat plateau formation that one would expect; instead, they were jagged and broken. The valley floor itself – for as far as he could see amidst the squat mesas – seemed to be sharp-edged gravel. Shatter flakes from the mining.

In this single valley, an entire army could have fashioned its weapons of stone ...

And the flint in this place was far from exhausted.

Bairoth Gild’s voice filled his head. ‘Karsa Orlong, you circle the truths as a lone wolf circles a bull elk.’

Karsa grunted, his only reply. He could see, on the cliff on the other side, more caves, these ones carved into the sheer wall. Reaching the shadowed valley floor, he set out for them. The gravel underfoot was thick, shifting treacherously, the sharp edges slicing into the hide soles of his moccasins. The air smelled of limestone dust.