acteristic
of a sound and strong mind, is to find in everything those certain
bounds, 'quos ultra citrave nequit consistere rectum'. These boundaries
are marked out by a very fine line, which only good sense and attention
can discover; it is much too fine for vulgar eyes. In manners, this line
is good-breeding; beyond it, is troublesome ceremony; short of it, is
unbecoming negligence and inattention. In morals, it divides ostentatious
puritanism from criminal relaxation; in religion, superstition from
impiety: and, in short, every virtue from its kindred vice or weakness. I
think you have sense enough to discover the line; keep it always in your
eye, and learn to walk upon it; rest upon Mr. Harte, and he will poise
you till you are able to go alone. By the way, there are fewer people who
walk well upon that line, than upon the slack rope; and therefore a good
performer shines so much the more.

Your friend Comte Pertingue, who constantly inquires after you, has
written to Comte Salmour, the Governor of the Academy at Turin, to
prepare a room for you there immediately after the Ascension: and has
recommended you to him in a manner which I hope you will give him no
reason to repent or be ashamed of. As Comte Salmour's son, now residing
at The Hague, is my particular acquaintance, I shall have regular and
authentic accounts of all that you do at Turin.

During your stay at Berlin, I expect that you should inform yourself
thoroughly of the present state of the civil, military, and
ecclesiastical government of the King of Prussia's dominions;
particularly of the military, which is upon a better footing in that
country than in any other in Europe.

You will attend at the reviews, see the troops exercised, and inquire
into the numbers of troops and companies in the respective regiments of
horse, foot, and dragoons; the numbers and titles of the commissioned and
non-commissioned officers in the several troops and companies; and also
take care to learn the technical military terms in the German language;
for though you are not to be a military man, yet these military matters
are so frequently the subject of conversation, that you will look very
awkwardly if you are ignorant of them. Moreover, they are commonly the
objects of negotiation, and, as such, fall within your future profession.
You must also inform yourself of the reformation which the King of
Prussia has lately made in the law; by which he has both lessened the
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