Put the whites of three eggs into a bowl and beat with an egg-beater to a stiff froth. Add ½ cupful of sugar and continue to whip for five minutes. Drop in one by one the yolks of 3 eggs, and whip until light. Mix ¼ teaspoonful of carbonate of soda with 1 cupful flour, sift three times, and mix lightly into the egg mixture. Put into a greased square cake-tin and bake in a moderate oven. When done turn out on to a sugared paper, cut into rounds, spread with whipped cream, place strawberries and whipped cream around the dish, and decorate the top with strawberries in crown fashion. The cake may be split and used in two layers, if desired.