The Ladies' Book of Etiquette, and Manual of Politeness

While on a visit to one friend, do not accept too many invitations from others, and avoid spending too much time in paying calls where your hostess is not acquainted. You owe the greater portion of your time and society to the lady whose hospitality you are accepting, and it is best to decline invitations from other houses, unless they inclose one for your hostess also. Avoid paying any visits in a family not upon good terms with your hostess. If such a family are very dear friends of your own, or you can claim an acquaintance, pleasant upon both sides, with them, write, and state candidly the reason why you cannot visit them, and they will appreciate your delicacy. If, while on a visit to one friend, you receive an invitation to spend some time with another friend in the same place, accept it for the period which you have named as the termination of your first visit. You insult your hostess by shortening your visit to her to accept another invitation, and quite as much of an insult is it, to take the time from the first visit to go to pay another, and then return to your first hostess, unless such an arrangement has been made immediately upon your arrival. Never invite any friend who may call upon you to stay to dinner or tea; you will be taking a most unwarrantable liberty in so doing. This is the right of your hostess, and if, by her silence, she tacitly declines extending this courtesy, you will be guilty of impertinence in usurping her privilege.