Then a ghost of a smile drifted across his face.

You look as if a ghost has drifted across your grave.

A little ghost of laughter drifted to her from the hill road.

The ghost of a smile drifted across her face.

His eyes opened, focused on Rebecca, and the ghost of a smile drifted over his face.

No ghost drifted out of it; there was nobody in the lock at all.

The ghost drifted free with a cry of relief.

The ghost drifted effortlessly through the door, vanishing from view.

More ghosts drifted past the opening, streaming toward the entrance of the zoo chamber.

The ghost drifted away from her, realizing that he had said something provocative and unwarranted.