11.   Darkness descended on the room.

12.   Redd said a lot of locals left on unplanned vacations when darkness first descended Thursday.

13.   The light grew slanting and weak, and darkness descended before he left work.

14.   After darkness descended on the city, intermittent gunshots and shouting could be heard from areas where military and police mounted roadblocks.

15.   She disappears as darkness descends.