Buttered Prawns

Remove from their shells three breakfast cupfuls of prawns, and dredge over
them salt and pepper to taste, place them in a saucepan and pour over them two
breakfast cupfuls of good rich gravy, and add a small lump of butter, well-kneaded
with flour, to thicken it. Then place the pan at the side of the fire, and simmer
gently for five to six minutes, after which, turn the prawns out on to a dish and serve.