Open neatly thirty-six medium-sized, fresh Rockaway oysters; place them in a saucepan without their juice, adding one ounce of good butter; cover the pan, put it on the stove, and let cook for two minutes, then add a small glassful of good Madeira wine (about a cocktail glass) and a very little cayenne pepper. Cook together for two minutes longer, then add one gill of Espagnole sauce (No. 151) and one gill of demi-glace (No. 185). Stir thoroughly until boiling, and just before serving squeeze in the juice of a good lemon, add half an ounce of good butter, also a teaspoonful of finely chopped parsley, and serve immediately in a hot tureen.