Sift flour, salt, baking powder and baking soda together. Cream butter, add sugar and mix well. Beat egg and add to the butter mixture. Add boiling water to orange juice to make 3/4 cup of liquid. Add sifted dry ingredients alternately with the butter mixture to the liquid ingredients. Add grated orange rind, walnuts and cranberries. Combine evenly and place mixture into greased loaf pan. Let rise for 20 minutes. Then bake at 325 degrees for 50-60 minutes. Loaves can be frozen. Wrap in waxed paper.