Etiquette: The Blue Book of Social Usage by Emily Post, New York and London, Funk & Wagnalls Co, 1922/37.
In well appointed houses a silver-bladed knife should be given you with all leafy salads, but if you happen to be given none, you do the best you can by cutting each leaf into very small pieces and eating it in postage-stamp samples. At all events, beware of rolling the fork and wrapping springy leaves around the fork in a spiral.
Never suck an orange in a restaurant, or at a table anywhere – unless at a picnic. You can peel it and divide sections and eat it in your fingers; or cut it in half and eat with a spoon, or cut it in any way you like best. My own favourite way is to cut off the rind with a sharp knife, then holding the fork in the left hand and the knife in the right, cut the peeled orange in half crossways and cut into small pieces and eat with a fork.