The very faintest of tremors touched the earth at Cosca’s back. A moment later there was a thunderous detonation, so loud that it sent pain lancing through his head. The world went suddenly, entirely silent but for a faint, high-pitched whine. The earth shook. Wind ripped and eddied along the trench, tearing at his hair and nearly dragging him over. A cloud of choking dust filled the air, nipping at his lungs and making him cough. Gravel rained down from the sky, he gasped as he felt it sting at his arms, at his scalp. He cowered like a man caught out in a hurricane, every muscle tensed. For how long, he was not sure.

Cosca opened his eyes, dumbly uncurled his aching limbs and got weakly to his feet. The world was a ghost-place of silent fog. The land of the dead, surely, men and equipment no more than phantoms in the murk. The mist began to clear. He rubbed at his ears but the whining continued. Others got up, staring around, faces caked with grey dirt. Not far away someone lay still in a puddle in the bottom of a trench, his helmet stoved in by a chunk of rock, steered by the fickle Fates directly onto his head. Cosca peered over the lip of the trench, blinked up towards the summit of the mountain, straining through the gradually settling dust.

“Oh.” The wall of Fontezarmo appeared undamaged, the outline of towers and battlements still very much present against the lead-white sky. A vast crater had been blown from the rock, but the great round tower directly above it still clung stubbornly to the edge, even slightly overhanging empty space. It seemed for a moment to be perhaps the most crushing anticlimax of Cosca’s life, and there had been many.

Then, in dreamlike silence and with syrupy slowness, that central tower leaned, buckled, fell in on itself and collapsed into the yawning crater. A huge section of wall to either side of it was dragged after, all folding up and dissolving into rubble under its own weight. A man-made landslide of hundreds of tons of stone rolled, bounced, crashed down towards the trenches.

“Ah,” said Cosca, silently.

For a second time men flung themselves on their faces, covered their heads, prayed to the Fates or whichever of a range of gods and spirits they did or did not believe in for deliverance. Cosca stayed standing, staring fascinated as a giant chunk of masonry perhaps ten tons in weight hurtled down the slope directly towards him, bouncing, spinning, flinging pieces of stone high into the air, all without the slightest sound but for perhaps a vague crunching, like footsteps on gravel. It came to an eventual stop no more than ten strides distant, rocked gently to one side and the other, and was still.

A second cloud of dust had plunged the trench into choking gloom, but as it gradually faded Cosca could see the vast breach left in the outer wall of Fontezarmo, no fewer than two hundred strides across, the crater beneath it now choked with settling rubble. A second tower at its edge leaned at an alarming angle, like a drunken man peering over a cliff, ready at any moment to topple into emptiness.