INVALID’S calls.  A woman unable to call from sickness
       may have her calls made for her by her
       sister, or daughter, or some female relative.

Invitations.  Care should be exercised in inviting
       new acquaintances to breakfast, luncheon, or
       dinner, unless there are some particular
       reasons why they will be especially agreeable
       to those invited.

       All invitations should be sent by mail.

Verbal invitations should be avoided as much as possible, and if a verbal one is given, it should be followed immediately by one in writing.

  Accepting or declining.  Invitations to all
       entertainments, when answers are expected,
       should be acknowledged by a written letter
       of acceptance or regret.  The answer should
       be sent to the person or committee issuing the
       invitation.

Invitations to dinners, musicales, weddings, and breakfasts should be answered at once, and those to balls, dances, and receptions within one week.

Invitations to ordinary “At Homes,” teas, or weddings, which do not include invitations to the wedding breakfast or reception, need no acknowledgment.

The invitations sent to a family—­as, mother, or daughter, or several daughters—­ may be answered by one person for all.  But invitations sent to the men of the family should be answered by each man.

When it is found necessary to decline after accepting an invitation, a card should be sent the evening of the entertainment with an explanatory letter the day following.

  Balls.  Invitations to balls or assemblies should
       be answered immediately, and if declined the
       ticket should be returned.

  Dancing.  While a woman may accept or decline
       any invitation to dance, it is considered a
       discourteous act to refuse one man and to accept
       thereafter from another an invitation to
       the same dance.

  Weddings.  Such invitations should be answered
       at once, except when the invitation does not
       include an invitation to the wedding reception
       or breakfast, in which case no answer is
       needed.

  Addressing.  When invitations are sent to a
       husband and wife and daughter, only one envelope
       is needed, the daughter’s name appearing
       under her parents.  Separate envelopes
       should be addressed to two daughters—­as,
       Misses Wilson.

       Separate envelopes should be addressed to
       each son.

  Men.  If an invitation is sent to a man, he should
       answer it himself; but if sent to a man and
       wife, the latter may answer for both.