Then all went out and darkness once more fell upon the deep!

As things now stood, they had no place to go once darkness fell.

If the former were true, I wanted to know it before darkness fell.

She had no idea how quickly the darkness fell there.

They kept the fire going this way until long after darkness fell.

Only when darkness fell did the fight come to an end.

The sun had set long ago, and now darkness fell suddenly.

Things were getting set up pretty good; as darkness fell there was little left to do.

Their fire seems a small thing against the darkness falling.

There was little more he could hope to do until darkness fell again that evening.