I have received your two letters of December the 30th and April the 18th, and am very happy to find by them, as well as by letters from Mr. Wythe, that you have been so fortunate as to attract his notice and good will; I am sure you will find this to have been one of the most fortunate events of your life, as I have ever been sensible it was of mine. I enclose you a sketch reading, which submit to his correction. Many of these are among your father's books, which you should have brought to you. As I do not recollect those of them not in his library, you must write to me for them, making out a catalogue of such as you think you shall have occasion for, in eighteen months from the date of your letter, and consulting Mr. Wythe on the subject to this sketch. I will add a few particular observations:

Paris, August10, 1787

Dear Peter,

Italian. I fear that learning this language will confound you French and Spanish. Being all of them degenerated dialects of the Latin, they are apt to mix in conversation. I have never seen a person speaking the three languages, who did not mix them. It is a delightful language, but late events having rendered the Spanish more useful, lay it aside to prosecute that.

Moral Philosophy. I think it lost time to attend lectures on this branch. He who made us would have been a pitiful bungler, if he had made the rules of our moral conduct a matter of science. For one man of science, there are thousands who are not. What would have become of them? Man was destined for society. His morality, therefore, was to be formed to this object. He was endowed with a sense of right and wrong, merely relative to this. This sense is as much a part of his nature, as the sense of hearing, seeing, feeling; It is the true foundation of morality, and not the tokaol, truth, etc., as fanciful writers have imagined. The moral sense, or conscience, is as much a part of man as his leg or arm. It is given to all human beings in a stronger or weaker degree, as force of members is given them in a greater or less degree. It may be strengthened by exercise, as may any particular limb of the body. This sense is submitted, indeed, in some degree, to the guidance of reason; but it is a small stock which is required for this even a less one than what we call common sense. State a moral case to a plowman and a professor. The former will decide it as well and often better than the latter, because he has not been led astray by artificial rules. In this branch, therefore, read good books, because they will encourage, as well as direct your feelings. The writings of Sterne, particularly, form the best course of morality that ever was written. Besides these, read the books mentioned in the enclosed paper, and, above all things, lose no occasion of exercising your dispositions to be grateful, to be generous, to be charitable, to be humane, to be true, just, firm, orderly, courageous, etc… Consider every act of this kind, as an exercise which will strengthen your moral faculties and increase your worth.

Traveling. This makes men wiser, but less happy. When men of sober age travel, they gather knowledge, which they may apply usefully for their country; but they are subject ever after to recollections mixed with regret; their affections are weakened by being extended over more objects; and they learn new habits which cannot be gratified when they return home. Young men, who travel, are exposed to all these inconveniences in a higher degree, to others still more serious, and do not acquire that wisdom for which a previous foundation is requisite by repeated and just observations at home. The glare of pomp and pleasure is analogous to the motion of the blood; it absorbs all their affection and attention, they are torn from it as from the only good in this world, and return to their home as to a place of exile and condemnation. Their eyes are forever turned back to the object they have lost, and its recollection poisons the residue of their lives. Their first and most delicate passions are hackneyed on unworthy objects here, and they carry home the dregs, insufficient to make themselves or anybody else happy. Add to this, that a habit of idleness, an inability to apply themselves to business is acquired, and renders them useless to themselves and their country. These observations are founded in experience. There is no place where your pursuit of knowledge will be so little obstructed by foreign objects, as in your own country, nor any, wherein the virtues of the heart will be less exposed to be weakened. Be good, be learned, and be industrious, and you will not want the aid of traveling, to render you precious to your country, dear to your friends, happy within yourself. I repeat my advice, to take a great deal of exercise, and on foot. Health is the first requisite after morality. Write to me often, and be assured of the interest I take in your success, as well as the warmth of those sentiments of attachment with which I am.

Dear Peter,

Your affectionate friend.