social standing, it is often a kindly act of encouragement for the
latter to shake hands, with a few cordial words.

It is not necessary to introduce people who meet at your house on
morning calls, though it may be done with propriety if the
introduction has been previously ascertained to be mutually
pleasant.

It is optional after such an introduction, with the parties
introduced, to continue or drop the acquaintance so formed.
Without a formal introduction, the merely meeting at the house of
a mutual friend, does not warrant any future recognition. It
rests, however, after an introduction with the lady, if between
lady and gentleman, with the married or elder lady, if between
lady and lady, and with the elder, if between gentlemen, to
continue or drop the acquaintance.

Gentlemen who meet at the house or rooms of a mutual friend are
not obliged to recognize one another if they meet again elsewhere.
There is no rule forbidding their doing so, if agreeable to both
parties, but there is no requirement of etiquette obliging them to
appear as if they had even met before.

A lady is not obliged to afterwards recognize a partner with whom
she may have danced at a ball. It is entirely optional with her to
do so or not; and if she has danced several times with the
gentlemen, it will be a question between her and her conscience
how far she may consider herself justified in passing by without
notice one who has extended to her so much courtesy at a ball.
Etiquette, however, does not require even the slightest