Wine should be handed by the waiters after soup. To decline wine by covering the mouth of the wine-glass with the hand is an ill- bred gesture. Say simply "Not any, thank you," and the waiter will not fill your glass.
Fish follows next in order. A slice, neatly cut, not hashed up by bad carving, should be placed upon each plate, with a slice of egg, and fish sauce. If there be a silver knife, use it to cut the fish. If not, take your fork in your right hand and supply the place of the knife by a small piece of bread, which you should cut off, and when your fish is eaten, leave upon your plate.
Do not eat as if you had good fare for the first time in your life—that is to say, do not eat ravenously, and do not eat in a noticeable way.
Never smack the lips when eating.
Never take a long, deep breath after you finish eating, as if the exercise had fatigued you.
Never make noises in your mouth or throat.
Never suck your teeth, or pass your tongue round the outside of your gums.
Never, even with cheese, put your knife into your mouth.
Never pick your teeth, or put your finger into your mouth.
If you find you have a fish-bone in your mouth, cover your lips with a napkin to remove it. It is better to be very careful to remove all bones before putting fish into your mouth. On no account spit the bones out upon your plate.