Oil three sheets of white paper a little larger than the length of the fish. Cut six thin slices of cooked, lean ham; lay one slice on each piece of paper, and on top a tablespoonful of cooked fine herbs (No. 143). Select three mackerel; make four or five incisions on each side; season with a good pinch of salt and a pinch of pepper, divided evenly on both sides of the fish, then roll them lightly, and lay the mackerel on top of the fine herbs; spread a tablespoonful more herbs over each mackerel, and cover with a slice of ham. Then lift up the other side of the paper and twist the edges together with the fingers, or a simpler way is to fold them the same as trout (No. 316). When ready, put them in a baking-sheet, place them in a moderate oven, and let bake for fifteen minutes. Have a hot dish ready, and after taking them from the oven, use a cake-turner to lift the fish up gently, and dress them on the dish, leaving the paper undisturbed, then serve.