He turned and hurried into the hotel, traversed Peacock Alley scanning every woman he passed, searching for a slim shape swathed in chinchilla. There were no chinchilla wraps in Peacock Alley; none in the dining-room where people already were beginning to gather and the orchestra was now playing; no young girl in chinchilla in the waiting room, or in the north dining-room.

Then, suddenly, far across the crowded lobby, he saw a slender, bare-headed girl in a chinchilla cloak turn hurriedly away from the room-clerk’s desk, holding a key in her white gloved hand.

Before he could take two steps in her direction she had disappeared in the crowd.

He made his way through the packed lobby as best he could amid throngs of people dressed for dinner, theatre, or other gaiety awaiting them somewhere out there in the light-smeared winter fog; but when he arrived at the room clerk’s desk he looked for a chinchilla wrap in vain.

Then he leaned over the desk and said to the clerk in a low voice: “I am a Federal agent from the Department of Justice. Here are my credentials. Now, who was that young woman in chinchilla furs to whom you gave her door key a moment ago?”

The clerk leaned over his counter and, dropping his voice, answered that the lady in question had arrived only that morning from San Francisco; had registered as Madame Aoula Baroulass; and had been given a suite on the fourth floor numbered from 408 to 414.

“Do you mean to arrest her?” added the clerk in a weird whisper.

“I don’t know. Possibly. Have you the master-key?”

The clerk handed it to him without a word; and Cleves hurried to the elevator.

On the fourth floor the matron on duty halted him, but when he murmured an explanation she nodded and laid a finger on her lips.