Lay in salt and water for half an hour ; sew up in coarse, thin muslin fitted to the shape, and cook ten minutes to the pound, after the boil begins, in boiling salted water in which a table-spoonful of vinegar has been mixed. Cut the stitches, remove the cloth, lay the fish upon a hot platter, rub over with butter and lemon-juice, pour over it a good egg sauce and serve more of the same in a boat.