Mix together 2 pounds pork and 2 pounds ham ground together. 2 cups of graham cracker crumbs with 1 1/2 cups of milk and 3 eggs beaten slightly. Shape into loaf. For the sauce for the top, mix 1 can tomato soup, 1/2 cup water, 1/2 cup vinegar (white), 1 tablespoon dry mustard, and 1 cup brown sugar. Bake in covered roaster for 2 1/2 hours, basting every 1/2 hour at 350 degrees. Take lid off last 15 minutes.