That pleased him; he could rest better if the gray fog did not dominate everything.

He had been in the gray fog a long time.

It was as if he were peering into a gray fog.

Suddenly he was flying up into the thick gray fog.

In her nightmare, there had never been any lights, only gray fog.

The thought stood out in the grey fog that was my mind.

The cloud cover had come up close and, for a moment, all was gray fog.

And it seemed, in his dream, that the gray fog cleared away.

A kind of swirling gray fog came in the door.

The veil of gray fog across his past was thicker.