If, when walking with one friend, you should meet another, it is
not necessary to introduce them; indeed, you should not do so
without special reason for it. Never, even after an introduction,
start a long conversation, unless all continue the walk in the
same direction.

Should you, when walking with a friend, meet a lady who desires to
speak to you, your friend must stop with you, yet an introduction
under such circumstances does not exact any future recognition.

Sisters, brothers or other relatives may always be introduced to
friends when met casually.

If friends meet at public places of amusement and are accompanied
by strangers, introductions are not required by etiquette, and if
made do not oblige any future acquaintance.

It is not necessary to have an introduction in order to pay your
respects to the President of the United States, excepting that of
the master of ceremonies at the receptions. He will receive your
card and present you. For a private interview it is better to be
introduced by a Senator or a member of the House of
Representatives.

In visiting foreign courts, introductions are more a matter of
ceremony than in this country. If you wish to obtain an
introduction to the Emperor of France, you must address your
request to the Grand Chamberlain, which may be done personally or
by letter.