Read the following passage about Lyddie packing Rachel's bag in chapter 18.
She packed the bag. It took less than a minute. Rachel had so little. She remembered the primer, and then decided to keep it. Rachel would have a new one, a better one now...She got her box of writing materials, dipped her pen in ink , and wrote in painful, careful script on the fly leaf: "For Rachel Worthen from her sister Lydia Worthen, June 24, 1846," wiping her face carefully on her apron as she wrote so as not to blot the page.
What is the tone of this passage?