The suspicious attitude is, however, no worse than the familiar one employed by some of the young women serving in shops. A clerk who urges a customer to buy because the article in question has proved so satisfactory in her own family, or the young woman who calls one “dearie” or “honey” as she fits a cloak upon one or manipulates one’s millinery, makes a mistake. The relation between clerk and customer should be always formal and courteous on both sides.

Marketing is a branch of shopping in which many women not fundamentally ill-natured, have the appearance of being so. There is a kind of ugly scrutiny which many women apply to the inspection of vegetables, meat and other edibles that is most unattractive. If these women had an idea of the way they look when they bend their hard cold eyes upon the innocent vegetables and fruits, they would, at any cost, cultivate a more agreeable manner. Beware of the marketing stare. As for a string bag, if you have one put it in the furnace.

Marion Harland's Complete Etiquette — Part 190

A rudeness of which people who should know better are frequently guilty is that of criticizing a dear friend of the person to whom one is talking. This is not only ill-mannered, but unkind, and one of many flagrant violations of the Golden Rule. If a man loves his friend, do not call his attention to that friend’s failings, nor twit him on his fondness for such a person. He is happier for not seeing the failings, and if the friendship brings him any happiness, or makes life even a little pleasanter for him, do not be guilty of the cruelty of clouding that happiness. If the man does see the faults of him he loves, and loyally ignores them, pretend that you are not aware of the foibles toward which he would have you believe him blind. The knowledge of the peccadillos of those in whom we trust comes only too soon; we need not hurry on the always disappointing, often bitter knowledge.

Marion Harland's Complete Etiquette — Part 190

Perhaps lack of breeding shows in nothing more than in the manner of receiving an invitation. Should a man say, patronizingly, “Oh, perhaps I can arrange to come,”—when you invite him to some function, write him down as unworthy of another invitation. He is lacking in respect to you and in appreciation of the honor you confer on him in asking him to partake of the hospitality you have devised.

Marion Harland's Complete Etiquette — Part 190