Duchesse Potatoes

Mash one quart of hot boiled potatoes through a fine colander with the potato masher; mix with them one ounce of butter, one level teaspoonful of salt, half a saltspoonful of white pepper, quarter of a saltspoonful of grated nutmeg, and the yolks of two raw eggs; pour the potato out on a plate, and then form it with a knife into small cakes, two inches long and one inch wide; lay them on a buttered tin, brush them over the top with an egg beaten up with a teaspoonful of cold water, and color them golden brown in a moderate oven.