"You ought to know that better than I, my dear abbé; nevertheless, I suspect the unusual motive which has made you desire my visit." "That is rather hard." "No, not very hard, for we are old acquaintances, and I know all your tricks, my dear abbé." "My tricks!--you know my tricks?" "You contrive excellent ones, sometimes,--but to return to our subject, I believe that, under a pretext of sickness which really does not exist, you have sent for me to learn from me, directly or indirectly, something which is of interest to you." "Come, doctor, that is rather a disagreeable pleasantry." "Wait, my dear abbé. In my youth I was physician to the Duke d'Otrante, when he was minister of police. He enjoyed, like you, perfect health, yet there was scarcely a day that he did not exact a visit from me. I was unsophisticated then, and, although well equipped in my profession, I had need of patrons, so, notwithstanding my visits to his Excellency seemed unnecessary, I went to his house regularly every day, about the hour he made his toilet, and we conversed. The minister was very inquisitive, and as I was professionally thrown with persons of all conditions, he, with charming good nature, plied me with questions concerning my patients. I responded with all the sincerity of my soul. One day I arrived, as I have told you, at the minister's house, when he had just completed his toilet, the very moment when a journeyman barber, the most uncleanly-looking knave I had ever seen in my life, had finished shaving him. "'M. duke,' said I to the minister, after the barber had departed, 'how is it that, instead of being shaved by one of your valets, you prefer the services of these frightful journeyman barbers whom you change almost every fortnight?' "'My dear,' replied the duke in a confidential tone, "'you cannot imagine how much one can learn about all sorts of people and things, when one knows how to set such fellows as that prattling.' Was this confession an amusement or a blunder on the part of this great man, or, rather, did he think me too silly to comprehend the full significance of his words? I do not know; but I do know that this avowal enlightened me as to the real intention of his Excellency in having me chat with him so freely every morning. After that, I responded with much circumspection to the questions of the cunning chief, who knew so well how to put in practice the transcendent maxim, 'The best spies are those who are spies without knowing it.'" "The anecdote is interesting, as are all that you tell, my dear doctor," replied the abbé, with repressed anger, "but I swear to you that your allusion is entirely inapplicable, and that, alas! I am very sick." "Forty years yet of such illness, and you will become a centenarian, my dear abbé," said the doctor, rising and preparing to take his leave.