Dear boy:  I have not received any letter, either from you or from Mr, Harte, these three posts, which I impute wholly to accidents between this place and Leipsig; and they are distant enough to admit of many.  I always take it for granted that you are well, when I do not hear to the contrary; besides, as I have often told you, I am much more anxious about your doing well, than about your being well; and, when you do not write, I will suppose that you are doing something more useful.  Your health will continue, while your temperance continues; and at your age nature takes sufficient care of the body, provided she is left to herself, and that intemperance on one hand, or medicines on the other, do not break in upon her.  But it is by no means so with the mind, which, at your age particularly, requires great and constant care, and some physic.  Every quarter of an hour, well or ill employed, will do it essential and lasting good or harm.  It requires also a great deal of exercise, to bring it to a state of health and vigor.  Observe the difference there is between minds cultivated, and minds uncultivated, and you will, I am sure, think that you cannot take too much pains, nor employ too much of your time in the culture of your own.  A drayman is probably born with as good organs as Milton, Locke, or Newton; but, by culture, they are as much more above him as he is above his horse.  Sometimes, indeed, extraordinary geniuses have broken out by the force of nature, without the assistance of education; but those instances are too rare for anybody to trust to; and even they would make a much greater figure, if they had the advantage of education into the bargain.  If Shakespeare’s genius had been cultivated, those beauties, which we so justly admire in him, would have been undisgraced by those extravagancies, and that nonsense, with which they are frequently accompanied.  People are, in general, what they are made, by education and company, from fifteen to five-and-twenty; consider well, therefore, the importance of your next eight or nine years; your whole depends upon them.  I will tell you sincerely, my hopes and my fears concerning you.  I think you will be a good scholar; and that you will acquire a considerable stock of knowledge of various kinds; but I fear that you neglect what are called little, though, in truth, they are very material things; I mean, a gentleness of manners, an engaging address, and an insinuating behavior; they are real and solid advantages, and none but those who do not know the world, treat them as trifles.  I am told that you speak very quick, and not distinctly; this is a most ungraceful and disagreeable trick, which you know I have told you of a thousand times; pray attend carefully to the correction of it.  An agreeable and, distinct manner of speaking adds greatly to the matter; and I have known many a very good speech unregarded, upon account of the disagreeable manner in which it has been delivered, and many an indifferent one applauded, from the contrary reason.  Adieu!