“Stubborn,” Ian said. “Your reputation has reached us. But I won’t stand out here all night. You can sit here as long as you like, and go back and make up lies to tell the rest, for all I care. The au’it may be the only one of you with courage to investigate what this place is. Will you come, au’it?”

The au’it stopped her writing, and lifted her head, and considered the proposition.

Marak found the proposition as impossible to ignore. The truth was he could not walk away from it without answers. But he was not inclined to meet a fortified position without looking it over and thinking it through, if nothing more than the evident fact that it had no weak points, and it had no evident communication with the outside, and it gave every evidence of being like the Beykaskh in its defenses.

The au’it looked at him, however, instead of folding her book. Everyone looked at him, as if he should know the risks. He did not, and knew he could only guess what they were venturing into.

But he got up. “Go back to the others,” he said to Hati. “Take Norit with you.” The au’it was doomed as he was, to carry out the Ila’s orders: in that matter he had no authority over her.

Hati, however, refused to do as he asked. “I came to see this place,” she said, and brought home to him the simple truth that he was not alone in his obsession and his visions: Hati’s were as strong; and maybe neither of them stronger than Norit’s. She had stood up and moved toward Ian.

Marak gave an exasperated sigh and stood up, and Hati and the au’it with him, and the three of them walked where Ian led, subtly uphill for a long walk toward the tower’s base. Hot glass, as if from some army of glassworkers, seemed to have fallen on the sand all about, cooling, including grains and holes and bubbles in its convolutions. If they had had to walk over that in the dark, they might have had hard going. But there was a broad walkway of safe, plain sand as the sun sank and lengthened shadows to their greatest extent, even the shadows of bits of glass that studded the sand.

“I’ve seen this,” Hati said under her breath. “I have seen this kind of glass.”

So had he, long ago, with the army. “At Oburan,” he said. “At Oburan, when the wind blew clear the western plain.”

“There’s nothing like this in the lowlands,” Norit said, clinging to Marak’s hand. “Nothing at all like this in the lowlands.”