Chocolate Sauce

Boil ¼ pound grated chocolate with 1 cup water and 3 tablespoonfuls sugar for 5 minutes; beat up the yolks of 3 eggs with 1½ cups cold milk; add it to the chocolate; keep stirring until the sauce comes to a boil; instantly take it from the fire, beat for a few minutes longer and pour it into a sauce bowl; serve cold with cold pudding.