"Please, sir, there is a man outside who asks to see you." "What does he want?" asked Commissioner Horn, looking up. "He says he has something to report, sir." "Send him in, then." The attendant disappeared, and the commissioner looked up at the clock. It was just striking eleven, but the fellow official who was to relieve him at that hour had not yet appeared. And if this should chance to be a new case, he would probably be obliged to take it himself. The commissioner was not in a very good humour as he sat back to receive the young man who entered the room in the wake of the attendant. The stranger was a sturdy youth, with an unintelligent, goodnatured face. He twisted his soft hat in his hands in evident embarrassment, and his eyes wandered helplessly about the great bare room. "Who are you?" demanded the commissioner. ...] Reprint of the detective novel starring Joseph Muller, Secret Service detective of the Imperial Austrian police.