How do Dorothy and Palmer finally get Nipper safely out of town and away from danger? How does their behavior then represent their mood?

When Dorothy tells Palmer she is going to on vacation with her parents, he tells her to take Nipper and set him free away from town. With the help of her parents, the plan is made for Nipper to leave with Dorothy the following morning. The narrator describes Dorothy carrying Nipper, who was asleep, in her hands across the street obviously taking gentle care of the bird for Palmer. Palmer stays in bed the next morning until noon, obviously not wanting to start a day without Nipper. Both children are very sad.