From: The Thorough Good Cook

Fish: 15. Baked Salmon

Clean, and cut the fish into slices ; put it in a dish, and make the following sauce: Melt an ounce of butter, kneaded in flour, in a pint and half of gravy, with two glasses of port wine, two tablespoonfuls of catsup, two anchovies, and a little cayenne. When the anchovies are dissolved, strain and pour the sauce over the fish, tie a sheet of buttered paper over the dish, and bake in an oven. Trout also answer well dressed in this way.