This last question was not uncalled for; for Lecoq had turned deadly white. The magic edifice of his hopes had crumbled beneath the weight of this man’s words as completely as if it were some frail house of cards erected by a child. He had only sufficient strength to murmur: “Nothing—nothing at all.”

Then, as he could endure this torture of uncertainty no longer, he went toward the marchioness’s house and rang the bell. The servant who came to open the door examined him attentively, and then announced that Madame d’Arlange was in the country. He evidently fancied that Lecoq was a creditor.

But the young detective insisted so adroitly, giving the lackey to understand so explicitly that he did not come to collect money, and speaking so earnestly of urgent business, that the servant finally admitted him to the hall, saying that he would go and see if madame had really gone out.

Fortunately for Lecoq, she happened to be at home, and an instant afterward the valet returned requesting the young detective to follow him. After passing through a large and magnificently furnished drawing-room, they reached a charming boudoir, hung with rose-colored curtains, where, sitting by the fireside, in a large easy-chair, Lecoq found an old woman, tall, bony, and terrible of aspect, her face loaded with paint, and her person covered with ornaments. The aged coquette was Madame, the Marchioness, who, for the time being, was engaged in knitting a strip of green wool. She turned toward her visitor just enough to show him the rouge on one cheek, and then, as he seemed rather frightened—a fact flattering to her vanity—she spoke in an affable tone. “Ah, well young man,” said she, “what brings you here?”

In point of fact, Lecoq was not frightened, but he was intensely disappointed to find that Madame d’Arlange could not possibly be one of the women who had escaped from the Widow Chupin’s hovel on the night of the murder. There was nothing about her appearance that corresponded in the least degree with the descriptions given by Papillon.

Remembering the small footprints left in the snow by the two fugitives, the young detective glanced, moreover, at the marchioness’s feet, just perceivable beneath her skirt, and his disappointment reached its climax when he found that they were truly colossal in size.

“Well, are you dumb?” inquired the old lady, raising her voice.

Without making a direct reply, Lecoq produced the precious earring, and, placing it upon the table beside the marchioness, remarked: “I bring you this jewel, madame, which I have found, and which, I am told, belongs to you.”

Madame d’Arlange laid down her knitting and proceeded to examine the earring. “It is true,” she said, after a moment, “that this ornament formerly belonged to me. It was a fancy I had, about four years ago, and it cost me dear—at least twenty thousand francs. Ah! Doisty, the man who sold me those diamonds, must make a handsome income. But I had a granddaughter to educate and pressing need of money compelled me to sell them.”

“To whom?” asked Lecoq, eagerly.