The day after this important information had been given to the king’s attorney, a man alighted from a carriage at the corner of the Rue Férou, and rapping at an olive-green door, asked if the Abbé Busoni were within.

“No, he went out early this morning,” replied the valet.

“I might not always be content with that answer,” replied the visitor, “for I come from one to whom everyone must be at home. But have the kindness to give the Abbé Busoni——”

“I told you he was not at home,” repeated the valet.

“Then on his return give him that card and this sealed paper. Will he be at home at eight o’clock this evening?”

“Doubtless, unless he is at work, which is the same as if he were out.”

“I will come again at that time,” replied the visitor, who then retired.

At the appointed hour the same man returned in the same carriage, which, instead of stopping this time at the end of the Rue Férou, drove up to the green door. He knocked, and it opened immediately to admit him. From the signs of respect the valet paid him, he saw that his note had produced a good effect.

“Is the abbé at home?” asked he.

“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.