Potted Fish

Clean the fish, remove the head, tail, fins, skin, and large bones. The small bones will be dissolved in the vinegar. Cut the fish into pieces for serving. Mix the salt, pepper, and spices. Pack the fish in layers in a small stone crock or deep agate-ware utensil, sprinkling the salt and adding pieces of onion between the layers. Pour over it vinegar to completely cover it. In the absence of a tight-fitting cover, use heavy, buttered paper tied on. Bake it for five or six hours in an insulated oven, the stones heated until the [paper test] shows a delicate brown. Potted fish will keep well if put into a cold place and kept covered with vinegar. It makes a good relish for lunch or tea.