Catcher in the Rye Chapter 4

Holden is in the bathroom with Stradlater. Stradlater mentions that his date is Jane Gallagher. Holden knows her and used to be with her, and he still likes her. He wants to go talk to her but doesn't because he isn't in the mood to do it. Stradlater asks Holden to write a paper for him and Holden agrees to do it.