This section is from the book "Practical Cooking And Serving", by Janet McKenzie Hill. Also available from Amazon: Practical Cooking and Serving: A Complete Manual of How to Select, Prepare, and Serve Food [1919].
Wash the fish thoroughly; let soak half an hour in cold water, skin side up; cover with water "just off the boil," let stand fifteen minutes, then drain carefully and wipe dry; brush over with butter or olive oil and broil over a rather dull fire about fifteen minutes. Turn onto a hot platter, dot with bits of butter, here and there, sprinkle with the juice of half a lemon and serve at once.
Prepare as before, then, when dry, remove skin and bones and separate into flakes. Put the flaked fish into a buttered servingdish and pour over it a thin white sauce equal in quantity to the fish; cover with buttered crumbs and bake in a hot oven long enough to brown the crumbs.
 
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