The columns of slaves, herded by overseers armed with small black weapons similar to the one Egil had used, came out into a broad square whose farther edges were veiled in the red murk. And Stark looked on ruin.

A great building had fallen in the centre of the square. The gods only knew what force had burst its walls and tossed the giant blocks like pebbles into a heap. But there it was, the one untidy thing in the city, a mountain of debris.

Nothing else was damaged. It seemed that this had been the place of temples, and they stood unharmed, ranked around the sides of the square, the dim fires rippling through their open porticoes. Deep in their inner shadows Stark thought he could make out images, gigantic things brooding in the spark-shot gloom.

He had no chance to study them. The overseers cursed them on, and now he saw what use the slaves were put to. They were clearing away the wreckage of the fallen building.

Helvi whispered, "For sixteen years men have slaved and died down here, and the work is not half done. And why do the Lhari want it done at all? I'll tell you why. Because they are mad, mad as swamp-dragons gone musth in the spring!"

It seemed madness indeed, to labour at this pile of rocks in a dead city at the bottom of the sea. It was madness. And yet the Lhari, though they might be insane, were not fools. There was a reason for it, and Stark was sure it was a good reason—good for the Lhari, at any rate.

An overseer came up to Stark, thrusting him roughly toward a sledge already partly loaded with broken rocks. Stark hesitated, his eyes turning ugly, and Helvi said,

"Come on, you fool! Do you want to be down flat on your back again?"

Stark glanced at the little weapon, blunt and ready, and turned reluctantly to obey. And there began his servitude.