“Yes; he is at work in his library, but he expects you, sir,” replied the valet. The stranger ascended a rough staircase, and before a table, illumined by a lamp whose light was concentrated by a large shade while the rest of the apartment was in partial darkness, he perceived the abbé in a monk’s dress, with a cowl on his head such as was used by learned men of the Middle Ages.

“Have I the honor of addressing the Abbé Busoni?” asked the visitor.

“Yes, sir,” replied the abbé; “and you are the person whom M. de Boville, formerly an inspector of prisons, sends to me from the prefect of police?”

“Exactly, sir.”

“One of the agents appointed to secure the safety of Paris?”

“Yes, sir,” replied the stranger with a slight hesitation, and blushing.