that； you will do well to follow it with Pere Bougeant's 'Histoire du
Traite de Munster；' in two volumes quarto； which contains many important
anecdotes concerning that famous treaty； that are not in Adamus Adami。
You tell me that your lectures upon the 'Jus Publicum' will be ended at
Easter； but then I hope that Monsieur Mascow will begin them again；
for I would not have you discontinue that study one day while you are at
Leipsig。 I suppose that Monsieur Mascow will likewise give you lectures
upon the 'Instrumentum Pacis；' and upon the capitulations of the late
emperors。 Your German will go on of course； and I take it for granted
that your stay at Leipsig will make you a perfect master of that
language； both as to speaking and writing； for remember； that knowing any
language imperfectly； is very little better than not knowing it at all：
people being as unwilling to speak in a language which they do not
possess thoroughly； as others are to hear them。 Your thoughts are
cramped； and appear to great disadvantage； in any language of which you
are not perfect master。 Let modern history share part of your time；
and that always accompanied with the maps of the places in question；
geography and history are very imperfect separately； and； to be useful；
must be joined。
Go to the Duchess of Courland's as often as she and your leisure will
permit。 The company of women of fashion will improve your manners；
though not your understanding； and that complaisance and politeness；
which are so useful in men's company； can only be acquired in women's。
Remember always； what I have told you a thousand times； that all the
talents in the world will want all their lustre； and some part of their
use too； if they are not adorned with that easy good…breeding； that
engaging manner； and those graces； which seduce and prepossess people in
your favor at first sight。 A proper care of your person is by no means
to be neglected； always extremely clean； upon proper occasions fine。
Your carriage genteel； and your motions graceful。 Take particular care
of your manner and address； when you present yourself in company。 Let
them be respectful without meanness； easy without too much familiarity；
genteel without affectation； and insinuating without any seeming art or
design。
You need not send me any more extracts of the German constitution； which；
by the course of your present studies； I know you must soon be acquainted
with； but I would now rather that your letters should be a sort of
journal of your own life。 As； for instance； what company you keep；
what new acquaintances you make； what your pleasures are； with your own
reflections upon the whole： likewise what Greek and Latin books you read
and understand。 Adieu！
End