What happened the first time ruby was writing to nan about Ruth in finding ruby starling?

In "Finding Ruby Starling," the first time Ruby writes to Nan about Ruth, she expresses her feelings of confusion and longing for her mother, who has left. Ruby shares her thoughts and emotions about Ruth's absence, revealing her struggles with their relationship and her desire for connection. This letter serves as a key moment that highlights Ruby's vulnerability and sets the stage for her journey of self-discovery and understanding.