Harry Potter and the Order of the Phoenix
Why did everyone whisper in the hall at Number Twelve, Grimmauld Palace?
w
w
Everyone had to whisper so as to not wake anything up.
"No, Harry, the meeting's only for members of the Order. Ron and Hermione are upstairs, you can wait with them until the meeting's over and then we'll have dinner. And keep your voice down in the hall," she added in an urgent whisper. "Why?" "I don't want to wake anything up."Harry Potter and the Order of the Phoenix
Everyone had to whisper so that they wouldn't wake up Sirius Blacks's mother's painting who would start insulting everyone by addressing them as mudbloods, blood traitors, half breeds etc. and she would not stop.
Harry Potter and the Order of the Pheonix (5) by J.K. Rowling
They didn't want to wake up Mrs. Black and hear her shrieking. What bit of good news greeted Harry after his first week's of detention?