Chicken Portuguese

Truss two young chickens as though for roasting. Lay on the bottom of
a large stew pan the rind of a piece of pork, and on this, place the
chicken. Add four ounces of butter, a head of celery chopped, two
onions sliced, three small carrots sliced, two Chili peppers cut up,
and the halves of two bell peppers from which the seeds have been
removed. Season with salt, cayenne, thyme and a few sweet herbs. Cover
and cook quickly for forty minutes, moistening from time to time with
a spoonful of stock or gravy. Then add two large tomatoes sliced, and
cook twenty minutes longer. Serve the chicken with the sauce poured
over it.