In what chapter of To Kill a Mockingbird does Dill's mother re-marry, preventing him from returning to Maycomb for the summer?

In Chapter 12, Dill's mother re-marries and he does not return to Maycomb County for the summer. Dill sends Scout a letter with a snapshot of his father enclosed. Dill tells Scout in the letter that he has to stay in Meridian because he plans on building a fishing boat with his father. Scout is happy for Dill but says she feels "crushed" at the fact that she won't be playing with her best friend throughout the summer. Dill also tells Scout that he loves her, and that he will come get Scout and marry her as soon as he gets enough money. Scout laments about Dill's absence and comments that summer days with Dill were routine, and without him, life was unbearable. Scout then admits that she was only miserable for two days. Scout's comments about her childhood romance depicts Harper Lee's humor.