The Doctor's system of hygiene strikingly coincided with his tastes; and his picture of the perfect life was a faithful description of the one he was leading at the time. But it is easy to convince a boy, whom you supply with all the facts for the discussion. And besides, there was one thing admirable in the philosophy, and that was the enthusiasm of the philosopher. There was never any one more vigorously determined to be pleased; and if he was not a great logician, and so had no right to convince the intellect, he was certainly something of a poet, and had a fascination to seduce the heart. What he could not achieve in his customary humour of a radiant admiration of himself and his circumstances, he sometimes effected in his fits of gloom. "Boy," he would say, "avoid me to-day. If I were superstitious, I should even beg for an interest in your prayers. I am in the black fit; the evil spirit of King Saul, the hag of the merchant Abudah, the personal devil of the mediæval monk, is with me--is in me," tapping on his breast. "The vices of my nature are now uppermost; innocent pleasures woo me in vain; I long for Paris, for my wallowing in the mire. See," he would continue, producing a handful of silver, "I denude myself, I am not to be trusted with the price of a fare. Take it, keep it for me, squander it on deleterious candy, throw it in the deepest of the river--I will homologate your action. Save me from that part of myself which I disown. If you see me falter, do not hesitate; if necessary, wreck the train! I speak, of course, by a parable. Any extremity were better than for me to reach Paris alive." Doubtless the Doctor enjoyed these little scenes, as a variation in his part; they represented the Byronic element in the somewhat artificial poetry of his existence; but to the boy, though he was dimly aware of their theatricality, they represented more. The Doctor made perhaps too little, the boy possibly too much, of the reality and gravity of these temptations. One day a great light shone for Jean-Marie. "Could not riches be used well?" he asked. "In theory, yes," replied the Doctor. "But it is found in experience that no one does so. All the world imagine they will be exceptional when they grow wealthy; but possession is debasing, new desires spring up; and the silly taste for ostentation eats out the heart of pleasure." "Then you might be better if you had less," said the boy. "Certainly not," replied the Doctor; but his voice quavered as he spoke. "Why?" demanded pitiless innocence. Doctor Desprez saw all the colours of the rainbow in a moment; the stable universe appeared to be about capsizing with him. "Because," said he--affecting deliberation after an obvious pause--"because I have formed my life for my present income. It is not good for men of my years to be violently dissevered from their habits."