Puffs of grey vapour marked where each one had struck.

A morning mist hung over the water, and I saw a small skiff making its way through the gray vapor.

For a moment, the entire surface of the starboard wing streams thin gray vapor.

The world was a round room, with walls of grey vapour.

As it melted the grey swirling vapour Janie became afraid of what they might see.

Ahead, the mountains were invisible through the gray swirling vapor.

A silhouette that merged with the grey swirling vapour and was lost again.

He stared, tried to make out what was happening through a curtain of swirling grey vapour.

There was a sharp pop and instantly a cloud of gray vapor rose from the floor.

Since the bankruptcy, he had a way of moving around the house like an odorless, gray vapor.