Advance preparation: In mixing bowl stir flour, sugar, baking powder, soda, and 1 teaspoon salt together thoroughly.
Beat together eggs, milk, butter, peel, and juice; stir into dry ingredients just till moistened.
Fold in berries and nuts.
Pour into greased 9x5x3-inch loaf pan.
Bake at 350° for 60 to 70 minutes.
Remove from pan; cool well.
Wrap in foil and store overnight before slicing.