Phoebe's Christmas Dough. This is connected due to Holden wanting to give back what his beloved sister gifted him.
Holden's Red Hunting Hat. Holden gave Phoebe his hat, much much later, when their together at the museum and Phoebe tells Holden she wants to go with him and they fight, Phoebe throws his hat back at him. Later, when they aren't angry at each other again, they go together to a carousel and Holden gives the hat back to Phoebe.
Holden's letter to Phoebe, Holden writes this letter to Phoebe so that they can meet up at the museum and say goodbye since Holden is leaving.
