The Ladies' Book of Etiquette, and Manual of Politeness

Never anticipate the point or joke of any anecdote told in your presence. If you have heard the story before, it may be new to others, and the narrator should always be allowed to finish it in his own words. To take any sentence from the mouth of another person, before he has time to utter it, is the height of ill-breeding. Avoid it carefully. Never use the phrases, "What-d-ye call it," "Thingummy," "What's his name," or any such substitutes for a proper name or place. If you cannot recall the names you wish to use, it is better not to tell the story or incident connected with them. No lady of high breeding will ever use these substitutes in conversation. Be careful always to speak in a distinct, clear voice; at the same time avoid talking too loudly, there is a happy medium between mumbling and screaming. Strive to attain it. Overlook the deficiencies of others when conversing with them, as they may be the results of ignorance, and impossible to correct. Never pain another person by correcting, before others, a word or phrase mispronounced or ungrammatically constructed. If your intimacy will allow it, speak of the fault upon another occasion, kindly and privately, or let it pass. Do not be continually watching for faults, that you may display your own superior wisdom in correcting them. Let modesty and kind feeling govern your conversation, as other rules of life. If, on the other hand, your companion uses words or expressions which you cannot understand, do not affect knowledge, or be ashamed of your ignorance, but frankly ask for an explanation.