This section is from the book "Soyer's Standard Cookery", by Nicolas Soyer. Also available from Amazon: Soyer's Standard Cookery.
Slit the fish on each side in a horizontal direction. Place on it a little mace, bay leaves, parsley, a small piece of onion, and some salt and pepper. Add two tablespoonfuls of vinegar. Place in the paper-bag, seal up, put on the grid in a moderate oven for twenty minutes (300 Fahr,.).
 
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