Your truly philosophical letter, my infinitely various Gabrielle, infused a portion of its charming spirit into my soul. My mind was fortified and elevated by your eloquence. Who could think that a woman of such a lively genius could be so profound? and who could expect from a woman, who has passed her life in the world, such original and deep reflections? You see you were mistaken when you thought that you had no genius for philosophic subjects.

After all that has been said by metaphysicians about the existence and seat of the moral sense, I think I can solve every difficulty by a new theory. You know some philosophers suppose the moral sense to be intuitive and inherent in man: others who deny the doctrine of innate ideas, treat this notion of innate sentiments as equally absurd. There they certainly are wrong, for sentiments are widely different from ideas, and I have that within me which convinces my understanding that sentiments must be innate, and proportioned to the delicacy of our sensibility; no person of common sense or feeling can doubt this. But there are other points which I own puzzled me till yesterday: some metaphysicians would seat the moral sense inherently in the heart, others would place it intuitively in the brain, all would confine it to the soul; now in my opinion it resides primarily and principally in the nerves, and varies with their variations. Hence the difficulty of making the moral sense a universal guide of action, since it not only differs in many individuals, but in the same persons, at different periods of their existence, or (as I have often experienced) at different hours of the day. All this must depend upon the mobility of the nervous system; upon this may hinge the great difficulties which have puzzled metaphysicians respecting consciousness, identity, &c. If they had attended less to the nature of the soul, and more to the system of the nerves, they would have avoided innumerable errors, and probably would have made incalculably important discoveries. Nothing is wanting but some great German genius to bring this idea of a moral sense in the nerves into fashion. Indeed, if our friend Mad. *** would mention it in the notes to her new novel, it would introduce it in the most satisfactory manner possible to all the fashionable world abroad; and we take our notions in this country implicitly from the Continent. As for you, my dear Gabrielle, I know you cut the gordian knot at once, by referring, with your favourite moralist, every principle of human nature to self-love. This does not quite accord with my ideas; there is something harsh in it, that is repugnant to my sensibility; but you have a stronger mind than I have, and perhaps your theory is right.

"You tell me I contradict myself continually," says the acute and witty Duke de la Rochefoucault: "No, but the human heart, of which I treat, is in perpetual contradiction to itself." Permit me to avail myself of this answer, dear Gabrielle, if you should accuse me of contradicting in this letter all that I said to you in my last. A few hours after I had despatched it the state of my nerves changed; I saw things of course in a new light, and repented having exposed myself to your raillery by writing in such a Magdalen strain. My nerves were more in fault than I. When one's mind or one's nerves grow weak, the early associations and old prejudices of the nursery recur, and tyrannize over one's reason: from this evil your liberal education and enviable temperament have preserved you; but have charity for my feminine weakness of frame, which too often counteracts the masculine strength of my soul. Now that I have deprecated your ridicule for my last nervous nonsense, I will go on in a more rational manner. However my better judgment might have been clouded for a moment, I have recovered strength of mind enough to see that I am in no way to blame for anything that has happened. If a man is amiable, and if I have taste and sensibility, I must see and feel it. "To love," as I remember your friend G****** once finely observed to you, "to love is a crime only in the eyes of demons, or of priests, who resemble demons." This is a general proposition, to which none but the prejudiced can refuse their assent: and what is true in general must be true in particular. The accident, I use the term philosophically, not popularly, the accident of a man's being married, or, in other words, having entered imprudently into a barbarous and absurd civil contract, cannot alter the nature of things. The essence of truth cannot be affected by the variation of external circumstances. Now the proper application of metaphysics frees the mind from vulgar prejudices, and dissipates the baby terrors of an ill-educated conscience. To fall in love with a married man, and the husband of your intimate friend! How dreadful the sounds to some ears! even mine were startled at first, till I called reason to my assistance. Then I had another difficulty to combat—to own, and own unasked, a passion to the object of it, would shock the false delicacy of those who are governed by common forms, and who are slaves to vulgar prejudices: but a little philosophy liberates our sex from the tyranny of custom, teaches us to disdain hypocrisy, and to glory in the simplicity of truth.

Josephine had been perfuming my hair, and I was sitting reading at my toilette; the door of my dressing-room happened to be half open; L—— was crossing the gallery, and as he passed I suppose his eye was caught by my hair, or perhaps he paused a moment, I am not certain how it was—my eyes were on my book.

"Ah! vous avez raison, monsieur, c'est la plus belle chevelure! Mais entrez donc, monsieur," cried Josephine, whom I can never teach to comprehend or respect English customs, "Eh! entrez, entrez, monsieur; madame est à sa toilette."

As I looked up I could not forbear smiling at the extreme ease and decision of Josephine's manner, and the excessive doubt and anxiety in the gentleman's appearance. My smile, which, Heaven knows, meant no encouragement, decided him; timidity instantly gave way to joy; he entered. What was to be done? I could not turn him out again; I was not answerable for any foolish conclusions he might draw from what he ought in politeness to have considered as a thing of course. All I could do was to blame Josephine for being a French woman. To defend her, and flatter me, was the gentleman's part; and, for an Englishman, he really acquitted himself with tolerable grace. Josephine at least was pleased, and she found such a perpetual employment for monsieur, and his advice was so necessary, that there was no chance of his departure: so we talked of French toilettes, &c. &c., in French for Josephine's edification: L—— paid me some compliments upon the recovery of my looks after my illness—I thought I looked terribly languid—but he assured me that this languor, in his eyes, was an additional grace; I could not understand this: he fancied that must be because he did not express himself well in French; he explained himself more clearly in English, which Josephine, you know, does not understand, so that she was now forced to be silent, and I was compelled to take my share in the conversation. L—— made me comprehend that languor indicating sensibility of heart was to him the most touching of female charms; I sighed, and took up the book I had been reading; it was the new novel which you sent me, dear Gabrielle; I talked of it, in hopes of changing the course of the conversation; alas! this led to one far more dangerous: he looked at the passage I had been reading. This brought us back to sensibility again—to sentiments and descriptions so terribly apposite! we found such a similarity in our tastes! Yet L—— spoke only in general, and he preserved a command over himself, which provoked me, though I knew it to be coquetry; I saw the struggle in his mind, and was determined to force him to be candid, and to enjoy my triumph. With these views I went farther than I had intended. The charm of sensibility he had told me was to him irresistible. Alas! I let him perceive all the weakness of my heart.—Sensibility is the worst timekeeper in the world. We were neither of us aware of its progressive motion. The Swiss—my evil genius—the Swiss knocked at the door to let me know dinner was served. Dinner! on what vulgar incidents the happiness of life depends! Dinner came between the discovery of my sentiments and that declaration of passion which I now must hear—or die.

"Le diner! mon Dieu!" cried Josephine. "Mais—finissons donc—la toilette de madame."

I heard the impertinent Swiss at the other end of the gallery at his master's door, wondering in broken English where his master could be, and conjecturing forty absurdities about his boots, and his being out riding, &c. &c. To sally forth in conscious innocence upon the enemy's spies, and to terminate the adventure as it was begun, à la Françoise, was my resolution. L—— and Josephine understood me perfectly.

"Eh! Monsieur de Vaud," said Josephine to the Swiss, whom we met on the landing-place of the stairs, "madame n'est elle pas coeffée à ravir aujourd'hui? C'est que monsieur vient d'assister à la toilette de madame." The Swiss bowed, and said nothing. The bow was to his master, not to me, and it was a bow of duty, not of inclination. I never saw a man look so like a machine; he did not even raise his eyes upon me or my coëffure as we passed.

Bah! cried Josephine, with an inexpressible accent of mingled indignation and contempt. She ran downstairs, leaving the Swiss to his stupidity. I was more afraid of his penetration. But I entered the dining-room as if nothing extraordinary had happened; and after all, you know, my dear Gabrielle, nothing extraordinary had befallen us. A gentleman had assisted at a lady's toilette. Nothing more simple, nothing more proper in the meridian of Paris; and does propriety change with meridians? There was company at dinner, and the conversation was general and uninteresting; L—— endeavoured to support his part with vivacity; but he had fits of absence and silence, which might have alarmed Leonora, if she had any suspicion. But she is now perfectly secure, and absolutely blind: therefore you see there can be no danger for her happiness in my remaining where I am. For no earthly consideration would I disturb her peace of mind; there is no sacrifice I would hesitate for a moment to make to friendship or virtue, but I cannot surely be called upon to plant a dagger in my own heart, to destroy, for ever to destroy my own felicity without advantage to my friend. My attachment to L——, as you say, is involuntary, and my love as pure as it is fervent. I have reason to believe that his sentiments are the same for me; but of this I am not yet certain. There is the danger, and the only real danger for Leonora's happiness; for whilst this uncertainty and his consequent fits of absence and imprudence last, there is hazard every moment of her being alarmed. But when L—— once decides, everything arranges itself, you know, Gabrielle, and prudence becomes a duty to ourselves and to Leonora. No word, or look, or coquetry could then escape us; we should be unpardonable if we did not conduct ourselves with the most scrupulous delicacy and attention to her feelings. I am amazed that L——, who has really a good understanding, does not make these reflections, and is not determined by this calculation. For his, for my own, but most for Leonora's sake, I wish that this cruel suspense were at an end. Adieu, dear and amiable Gabrielle.—These things are managed better in France.