In a large bowl sift the flour with sugar, baking powder, allspice, salt, and baking soda. Beat the egg thoroughly and combine with orange rind, juice, and melted butter. Add liquid to flour mixture all at once. Stir only until well blended. Stir in the nuts. Bake in a well greased loaf pan in preheated moderate oven 350ºF. for about 50 minutes or until the loaf tests clean. Cool for 5 minutes before removing from the pan. Cool completely before slicing. Makes 1 loaf