For the Sauce: Put 1 oz. of butter in another pan; add to that 1 dessertspoonful of flour; then add the liquor strained from the bones, cook 10 minutes, stirring all the time. Add a dessert-spoonful of cream, a little chopped parsley, and a squeeze of lemon. Pour over the fillets and serve.
For filleted haddock fried, use Sauce Piquante, No. 3, see Sauces for Fish.