The Doctor left his room, and locked the door carefully; putting the key in his pocket, he went down. When he entered the room he was amazed to see who was waiting for him. "The Duke d'Harcourt here!" said he, bowing respectfully to his visitor. The Duke said, "My visit should not surprise you, for I came, after all, only to thank you for your services to my dear Marie." "Duke," said Doctor Matheus, "your benevolent reception, when I had the honor to be presented to you, has converted a duty into a pleasure. The natural interest," added he, with profound emotion, "with which your daughter inspires all who see her, would make me most proud of her cure." "Doctor," said the Duke, looking most earnestly at the physician, "you inspire me with a confidence I have had in none of your brethren. Your reply, therefore, to my question, I shall look on as a sentence. Do not fear to be frank, Doctor, for I am prepared for every misfortune; already crushed by my sufferings, my heart looks forward to no earthly happiness. The lives of my two surviving children are the objects of my own life, but uncertainty is too much for me. Reply therefore, I beg you, sincerely to me whether the life of my child is in danger." "Duke," said Doctor Matheus, "the hand of God is more powerful than that of science.--HE often strikes down the strong, and preserves the weak, so that none here can tell when to expect his blows. I can, however, assure you on my honor, that your daughter, delicate as she is, at this time has not even a germ of the terrible malady which has ravaged your hearth. This germ is always in the blood of members of the same family. Art establishes this, though it can provide no remedy.--This secret enemy, however," said the physician, with a kind of pride, "before which all known remedies are powerless, I can perhaps oppose and conquer." "Tell me, Doctor, tell me!" said the Duke, clasping the Doctor's hands, "save my child, grant her life, and my fortune is yours." "Duke," said Matheus, "if I had the honor of a better acquaintance with you, I would not listen to such language as you have used.--Gold has little value in my eyes, and reputation no more, for I do not place my hopes for the future in my profession. Since, however, study has revealed to me the art of assisting those who suffer, and of saving those who are in danger, I would esteem it a crime not to do so; and I promise this art shall be employed in the cure of Mlle. d'Harcourt. "And," said the Duke, "will this be a secret to me?" "No, Duke; I will use it in your presence. I will also own that I have already made use of it, though but slightly, in the case of Mlle. d'Harcourt; what I have done, satisfies me that I may hope to see her completely restored."