West African folk tale

There once lived a woman who had one great desire. She longed to have a daughter—but alas! she was childless. She could never feel happy, because of this unfulfilled wish. Even in the midst of a feast the thought would be in her mind—"Ah! if only I had a daughter to share this with me!" One day she was gathering yams in the field, and it chanced that she pulled out one which was very straight and well shaped.