Do not use a classical quotation in the presence of ladies without
apologising for, or translating it. Even this should only be done when
no other phrase would so aptly express your meaning. Whether in the
presence of ladies or gentlemen, much display of learning is pedantic
and out of place.

There is a certain distinct but subdued tone of voice which is
peculiar to only well-bred persons. A loud voice is both disagreeable
and vulgar. It is better to err by the use of too low than too loud a
tone.

Remember that all "slang" is vulgar. It has become of late
unfortunately prevalent, and we have known even ladies pride
themselves on the saucy _chique_ with which they adopt certain
Americanisms, and other cant phrases of the day.

Such habits cannot be too severely reprehended. They lower the tone of
society and the standard of thought. It is a great mistake to suppose
that slang is in any way a substitute for wit.

The use of proverbs is equally vulgar in conversation; and puns,
unless they rise to the rank of witticisms, are to be scrupulously
avoided. There is no greater nuisance in society than a dull and
persevering punster.

Long arguments in general company, however entertaining to the
disputants, are tiresome to the last degree to all others. You should
always endeavour to prevent the conversation from dwelling too long
upon one topic.