BOILED PIKE WITH HORSERADISH SAUCE

Boil a large fish in salted and acidulated water with a bunch of parsley. Cook together two tablespoonfuls each of butter and flour, add three cupfuls of cream, and cook until thick, stirring constantly. Season with salt and pepper, add two tablespoonfuls of butter and three tablespoonfuls of freshly grated horseradish. Pour over the fish, and serve.