It had been little more than a dark shape gliding through black.

The great black shape glided across the dark room to the single window.

Then the dark shape of the boat itself glided alongside.

Long minutes passed; a phantom shape had glided out of sight.

A shadowy shape glided across the floor of the lower hallway.

A black shape glided from the rear door of the limousine.

He looked up and saw an enormous dark shape gliding above them, blotting out the sun.

Two enormous shapes glided past the boat, turned, and charged for it again.

Through that darkness, she saw shapes, darker yet, glide by.

Off beyond the parapet, however, a silent shape was gliding along the ground.