Rub opossum with salt and pepper. Brown onion in fat. Add opossum liver and cook until tender. Add bread crumbs, Worcestershire sauce, egg, salt, and water. Mix thoroughly and stuff opossum. Trusslike a fowl. Put in a roasting pan with bacon across back and pour one quart of water in pan. Roast uncovered in moderate oven 350ºF. until tender (about 2 1/2 hours).