His mood darkened by the hour, but he strode on.

But her mood darkened as she saw he was not going to offer some good Samaritan excuse.

But as he sat at his desk again his mood darkened once more.

Then the memory of the letter came back and her mood darkened.

As often happened these days, Strange's mood darkened suddenly.

Her mood darkened significantly as she watched him hurry back to his meeting.

Her mood darkened further when she tried to play the violin again.

His mood darkened a little as he went along the lane.

Even now his mood darkens when he thinks about that time.

Paul believes the war was a big mistake, and his mood darkened at the monument.