For a moment he sat in silence, as if making up his mind.

He sat in silence a moment, looking to one side.

Then he sat in silence for a moment and thought.

As we sat in silence, a picture made its way into my mind.

For a good while the men sat in silence by the fire.

He took his place between the two men and three sat in silence.

For a moment they just sat in silence, looking at anything but each other.

He turned back to the computer and for a while the three old friends sat in silence, waiting.

Then we both sat in silence for a while, thinking.

And then they sat in silence while the long hours went by.