Take three pounds of the tail part of a salmon. Steep it for five or six hours in a marinade composed of three tablespoonfuls of olive oil in a dish with a quarter of a bunch of parsley-roots, two bay-leaves, and a sprig of thyme. Take out the salmon and broil for ten minutes on one side and five minutes on the other (skin side). Dress on a hot dish, and serve with two ounces of melted butter, flavored with a light teaspoonful of finely chopped chervil, half a teaspoonful of chives, and the juice of half a medium-sized, sound lemon.