Almost an hour passed before he announced he was leaving for the day. Hermione was worried that she was about to finally tip over the edge into complete insanity before he left. Or that she was going to have a stroke. When he left the office, she could've cried in relief. She waited at least half an hour after his exit to demand her assistant hold all of her messages and leave her alone until she was done with the report. She stepped behind the door to her office, covered her entire body with the invisibility cloak, and slid out of the small opening. Rachel didn't even notice that the door was closed from the outside instead of the inside. A non-verbal locking spell would hopefully keep her from wandering in to discover that the room was empty.