PIKE À LA NORMANDY

Clean and draw a large fish and tie in a circle. Put into a fish-kettle with sliced onion, a bay-leaf, a pinch of thyme, a sprig of parsley, and salt and pepper to season. Add two cupfuls each of white wine and white stock and enough water to cover. Add a tablespoonful of butter, cover and simmer for forty minutes. Take up the fish, strain the sauce and thicken with two tablespoonfuls each of butter and flour cooked together. Take from the fire, add the yolks of four eggs beaten with the juice of a lemon, and two tablespoonfuls of butter. Strain over the fish and serve.