Unseen in the wild night, the occasional wisp of smoke drifted among the trunks.

There is, to be sure, an occasional wisp of humor.

Stars speckled the rich black, obscured only by an occasional wisp of cloud.

Except-except for the occasional sullen wisp of smoke from the shed ruins.

By the time the spacers started walking, only an occasional wisp crept over the edge.

Now the occasional wisp veiled the stars, but nothing more substantial.

He looked like something carved from stone, save for the occasional wisp of hair ruffling in the breeze.

An occasional wisp of mist came from behind the right front wheel well.

The fires were under control now and only an occasional wisp of smoke drifted up from the ruins.

Steam appeared to be rising from the lake and there were occasional wisps of it among the shrubbery.