The Prefect put his arm about the detective's shoulder, and gave him an affectionate hug. "My poor children," he cried, smiling at Grace. "In my excitement, my happiness, I had completely forgotten that you are only just married. And such a honeymoon as you have had. It is indeed shameful, and the fault is mine—mine alone. But I shall make amends, my children. You have rendered both me, and France, a great service, and I do not forget it. I insist that to-night you shall dine with me. You, De Grissac," he exclaimed, turning to the Ambassador, "will, I know, be one of the party. And it is not alone for the purpose of dining that I ask you, your service to France shall be acknowledged in a more substantial way. Monsieur de Grissac and myself will have the honor to present to you, Monsieur Duvall, and to your charming bride, some tokens of our gratitude and esteem. After that—go—enjoy your happiness. You have earned it." He glanced at his watch. "Madame, you are fatigued. You need rest—sleep. I insist that you permit me to send you to my house, where Madame Lefevre will have the honor to receive you, and make you comfortable. You, Duvall, can in the meantime make your arrangements for leaving Paris to-night, and also secure your baggage from the pension in the Rue Lubeck where it awaits you. I myself will accompany you, and render you any assistance in my power; we will then rejoin your wife at my house, where Monsieur de Grissac will meet us in time for dinner. What do you say?"
Grace clung to her husband's arm. "I'm afraid to leave him, even for a minute," she said.
Duvall pressed her hand, and noted her swollen eyes, her white and drawn cheeks. "You have had a terrible night, dear," he said, kissing her, "and you must have a few hours' rest. Go to Monsieur Lefevre's house, and lie down and sleep for a little while. You are so nervous you can scarcely stand. I will not be long."
She gave his arm a little squeeze, then turned to the Prefect. "I thank you, monsieur, and since my husband thinks it best, I will gladly go to your house at once. Good-by, Richard." She accompanied Monsieur Lefevre to the door.
Two hours later, Duvall, having made all arrangements for leaving Paris for London that night, descended from the Prefect's automobile at the latter's house in the Rue de Courcelles. Within an hour they had been joined by Monsieur de Grissac and were all seated about Monsieur Lefevre's hospitable board. Everyone was in jubilant spirits, and in the happiness of the moment all the suffering of the past week was forgotten. De Grissac presented to the bride a magnificent diamond crescent, and to Duvall a gold cigarette-case of exquisite design and workmanship, while Monsieur Lefevre, not to be outdone, placed in Grace's hand a rare lace shawl which, he assured her, had been worn by a Marquise under the Empire. To Duvall he gave a seal ring, with the arms of France engraved upon a setting of jade. "It belonged to my father," he said, simply. "With me it is a talisman; you will never ask any favor from me in vain."
When M. Lefevre came at last to say good-by to Duvall and his wife, there were tears of real sorrow in his eyes. He had no children of his own, and the happiness of his two young friends had been his happiness as well. The thought that he might never see them again left him with a great sense of loneliness.
"Good-by, my dear boy," he said, grasping Duvall's hand in both of his, as he stood beside the door of the automobile which was to take the happy pair to the railway station. "When you settle down upon that little farm in your own country, and raise the chickens, and the pigs, and, may I also venture to hope"—he smiled meaningly at Grace—"the children, do not forget your old friend Lefevre."
Duvall pressed his hand, while Grace hid her blushes in the darkness of the cab.
"I shall never forget, monsieur, that to you I owe the possession of the sweetest and best wife in the world. We shall meet again, I promise you."
"Good! I shall hold you to the promise, mon ami. And if you do not keep it"—he pointed his finger impressively at the pair in the cab—"I shall send for you to assist me in the next difficult case which puzzles me, and voilà! The thing is done. You would not dare to fail me, should I call upon you for assistance."