From: The Thorough Good Cook

Fish: 28. John Dory Boiled with Lobster Sauce
John Dory is boiled exactly the same as turbot, and the process in either case is so simple that I need not describe it. Put parsley round the fish, particularly in the opening of the head.

Noder's Note:
Even I don't fully understand this recipe yet, it is included for the sake of completeness, I plan to research this recipe after completion of the cookbook writeups.