Once he went to the cave mouth and looked out.

I'll wait for you at the mouth of the cave.

We had left him at the mouth of the cave, waiting.

He turned and started back for the mouth of the cave.

But the mouth of the cave I could not find.

Suddenly he found himself at the mouth of the cave.

They had been waiting just inside the mouth of the deep cave on the right.

Then he looked back toward the mouth of the cave.

The sun had not yet hit the mouth of the cave.

A man was standing at the mouth of the cave.