What are the mysterious messages who is the messenger in Walk Two Moons?

In "Walk Two Moons" by Sharon Creech, the mysterious messages are conveyed through the character of Sal's mother, who leaves behind hints about her feelings and experiences. The messenger of these messages is Sal herself, as she navigates her journey to understand her mother's choices and the significance of her absence. Throughout the story, Sal reflects on her mother's past and the lessons learned, ultimately realizing the importance of empathy and understanding in her own life.