I wanted to ask what that meant, but he stepped through into the next room. I crept in after him, half a step behind, keeping myself hidden by his body as much as possible. The only thing harder than moving myself forward into that room was the thought of falling behind Jeb and being caught alone here.

Sudden silence greeted our entrance.

We were in the gigantic, bright cavern again, the one they’d first brought me to. How long ago was that? I had no idea. The ceiling was still too bright for me to make out exactly how it was lit. I hadn’t noticed before, but the walls were not unbroken—dozens of irregular gaps opened to adjoining tunnels. Some of the openings were huge, others barely large enough for a man to fit through stooped over; some were natural crevices, others were, if not man-made, at least enhanced by someone’s hands.

Several people stared at us from the recesses of those crevices, frozen in the act of coming or going. More people were out in the open, their bodies caught in the middle of whatever movement our entrance had interrupted. One woman was bent in half, reaching for her shoelaces. A man’s motionless arms hung in the air, raised to illustrate some point he’d been making to his companions. Another man wobbled, caught off balance in a sudden stop. His foot came down hard as he struggled to keep steady; the thud of its fall was the only sound in the vast space. It echoed through the room.

It was fundamentally wrong for me to feel grateful to that hideous weapon in Jeb’s hands… but I did. I knew that without it we would probably have been attacked. These humans would not stop themselves from hurting Jeb if it meant they could get to me. Though we might be attacked despite the gun. Jeb could only shoot one of them at a time.

The picture in my head had turned so grisly that I couldn’t bear it. I tried to focus on my immediate surroundings, which were bad enough.

Jeb paused for a moment, the gun held at his waist, pointing outward. He stared all around the room, seeming to lock his gaze one by one with each person in it. There were fewer than twenty here; it did not take long. When he was satisfied with his study, he headed for the left wall of the cavern. Blood thudding in my ears, I followed in his shadow.

He did not walk directly across the cavern, instead keeping close to the curve of the wall. I wondered at his path until I noticed a large square of darker ground that took up the center of the floor—a very large space. No one stood on this darker ground. I was too frightened to do more than notice the anomaly; I didn’t even guess at a reason.