If a man has been invited to the church
       but not to the wedding reception, he should
       leave a card for the bride’s parents and the
       bridal couple, or should mail a card.

Sending by mail, or messenger.  After an
entertainment a man should call in person on
host and hostess, whether the invitation was
accepted or not.  If a card is mailed or sent,
it should be accompanied with an apology.

         At the beginning of the season a man
       should leave cards for all those whose entertainments
       he is in the habit of attending, or
       on whom he pays social calls.  These cards
       may also be mailed.  If left in person, there
       should be one for each member of the household
       or only two cards.

In the former case, there should be left one card for the host, one for the hostess, one for the “misses,” and one for the rest of the family and the guest.

If a man is unable to make a formal call upon a debutante and her mother at her debut, he should send his card by mail or messenger.

       A man may mail his card to a woman
       engaged to be married, if acquaintance
       warrants.

       Visitors to town should send cards to every
       one whom they desire to see.  The address
       should be written on them.

  Afternoon tea.  If a man is unable to be
       present at an afternoon tea, he should send a
       card the same afternoon.

  Breakfasts, luncheons, dinners.  A man
       should leave a card the day after a breakfast,
       luncheon, or dinner for the host and hostess,
       whether the invitation was accepted or not. 
       They may be sent by mail or messenger with
       an apology for so doing.

Entertainment by men.  After a man’s formal
entertainment for men, a man should leave a
card within one week, whether the event was
attended or not.  It can be sent by mail or
messenger.

P. P. C. cards may be sent by mail or messenger
upon departure from city, or on leaving
winter or summer resort.

Reception.  When the host and hostess receive
together, a man should leave one card for
both, and, if not present at the reception, he
should send two cards.

Wedding reception.  If a man has been invited
to the church but not the wedding
reception, he should leave or mail a card to
the bride’s parents, and also to the bridal
couple.

  Style.  The full name should be used, and if
       too long, the initials only.  The club address
       is put in the lower left-hand corner, and if
       not living at a club, the home address should
       be in lower right-hand corner.  In the absence
       of a title, Mr. is always used on an
       engraved but not a written card.