Now she could see him only through a little window in the thick wall.

It was as if her voice were talking on the other side of a very thick wall.

The air inside the thick walls was cool and still.

We went through, into a passage under the thick wall.

The door itself was on the outer side of a thick wall.

You don't need thick walls to guard a place no one knows about.

After that has happened they will stand on the thick walls and think themselves safe.

As though through a thick wall she heard Perry's voice.

A small cut in the thick walls serves as a window.

Today it is open to the sky, but parts of its thick walls still stand.