week.

If, on the other hand, a stranger sends you a letter of introduction
and her card, you are bound by the laws of politeness and hospitality,
not only to call upon her the next day, but to follow up that
attention with others. If you are in a position to do so, the most
correct proceeding is to invite her to dine with you. Should this
not be within your power, you can probably escort her to some of the
exhibitions, bazaars, or concerts of the season; any of which would be
interesting to a foreigner or provincial visitor. In short, etiquette
demands that you shall exert yourself to show kindness to the
stranger, if only out of compliment to the friend who introduced her
to you.

If you invite her to dine with you, it is a better compliment to ask
some others to meet her than to dine with her _tête-à-tête_. You are
thereby giving her an opportunity of making other acquaintances, and
are assisting your friend in still farther promoting the purpose for
which she gave her the introduction to yourself.

Be careful at the same time only to ask such persons as she will feel
are at least her own social equals.

A letter of introduction should be given unsealed, not alone because
your friend may wish to know what you have said of her, but also as
a guarantee of your own good faith. As you should never give such
a letter unless you can speak highly of the bearer, this rule of
etiquette is easy to observe. By requesting your friend to fasten the
envelope before forwarding the letter to its destination, you tacitly
give her permission to inspect its contents.