In a large bowl, combine crumbled cornbread, dried white bread slices, and saltines; set aside.
Melt the butter in a large skillet over medium heat. Add the celery and onion and cook until transparent, approximately 5 to 10 minutes. Pour the vegetable mixture over cornbread mixture. Add the stock, mix well, taste, and add salt, pepper to taste, sage, and poultry seasoning. Add beaten eggs and mix well. Reserve 2 heaping tablespoons of this mixture for the giblet gravy. Pour mixture into a greased pan and bake until dressing is coked through, about 45 minutes. Serve with turkey as a side dish.