"You're not used to the sight, that's all," replied the director, as he led the way back to his office.

Juve looked at his watch. "Well, I must leave you now and make a report to M. Havard. I'm afraid the murderer has slipped through our fingers."

"But you'll come back?"

"Of course."

"What am I to do meanwhile?"

"Nothing, unless you care to go over the hospital again."

"And the passes? Are they to be in force still? We have no one in the place but the staff."

"That is essential," replied Juve. "I must know with certainty who comes in and goes out. However, anyone known to your doorkeeper who wishes to leave need only sign in a register."