Behind him was the fortress, grim and grey, outlined in flame and smoke.

They had been much nearer that grim fortress than either had guessed.

Amidst this wreck of Nature, hard against a black mountain, stood a grim fortress.

When the forks of lightning ripped under the boiling clouds and shook the ground, she could see, too, the grim fortress where Jagang waited.

A grim, winged fortress was charging down on them from above.

Their entrance into the grim ancient fortress was unlike any that Stephen had ever known.

The thing is, Johannesburg has a terrible reputation for violence, and certainly on the drive from the airport all the houses looked like grim, blank-faced fortresses.

The old headquarters, a grim concrete fortress here, was converted into American military offices and is now being turned into university classrooms.

It had been built on the remnants of an earlier, and even grimmer fortress.

Between them were battlements - high walls of stone that copied the pattern of grim, old-time fortresses.