In the dark aperture there was outlined a vague white figure.

Gren, climb forward into the dark aperture and see what else you can find.

They crossed the drawbridge and entered the dark aperture of the front gate.

There was a glint of pale electric light from the dark aperture between the curved doors.

But again it refused to enter any of those dark apertures, darker than windows ought to be even on such a gloomy day.

Slowly the panel swung toward her, revealing a dark aperture in the wall behind.

But it was only the mouse-beaver who appeared in the dark oval aperture.

But where the eyes and mouth should have been there were only dark apertures.

I fixed my eyes on that dark aperture.

The altar moved, turning on a hidden pivot, allowing a glimpse of a dark aperture.