Access to individual upper houses was a single stone door.

One of the dead guards thrust open the stone door.

When open, no one could have guessed there were stone doors.

The stone door was very heavy and she needed all her strength to move it.

The tomb was open, the great stone door hauled back.

It was the sound of the stone door opening behind me.

As she turned away, the stone door opened, and four men came in.

Then the stone door swung back with one big push, and they all went inside.

The only possible way through was a stone door- set in it.

Down toward the place where the stone door should be.