Sal and Phoebe saw Sergeant Bickle at the drugstore.
Sal feels guilty about not stopping her mother from leaving, so she is unable to comfort Phoebe when she cries because she is dealing with her own emotions. Sal is also grappling with her own grief and confusion, which makes it hard for her to be there for Phoebe in that moment.
Sal and Phoebe saw Mrs. Finney taking a nap in her car parked at the Euclid Avenue bus stop.
Sal and Phoebe saw Ben pick up a red notebook for Mrs. Cadaver in the book "Walk Two Moons." This raised suspicions for the girls about the nature of Ben and Mrs. Cadaver's relationship.
She was irritating because she was so wrapped up in herself, she couldn't see how the people closest to her were hurting, like Sal or her own mother.
One example of foreshadowing was when Sal said a difference between her and Phoebe, is there was still a chance that Phoebe's mother could come back. We realized there was something deeper to Sal's mother's story than simply leaving.
in the shower
Phoebe is one of the moons of Saturn. See related link for more information.
In Chapter 27, Sal realizes that both her mother and Phoebe's mother left home because of a similar longing for freedom and independence. She understands that their departures were not a rejection of their families, but rather a necessary step in their personal journeys to find themselves and pursue their own dreams. Sal comes to see the parallels between their situations and gains a deeper empathy and understanding for her own mother's actions.
The climax was when Sal found her mother's bus.
See 'related links'.
In the book "Walk Two Moons" by Sharon Creech, Broc-Len-Cas is a made-up word that Phoebe and Sal use to describe a mysterious character they see outside Phoebe's house. It is meant to be a playful way for the girls to refer to the stranger without revealing his true identity.
Sal goes to Lewiston because she wants to see her mother's grave there.