"Mamma, how much longer have we got to ride?" asked Nan Bobbsey, turning in her seat in the railroad car, to look at her parents, who sat behind her. "Are you getting tired?" asked Nan's brother Bert. "If you are I'll sit next to the window, and watch the telegraph poles and trees go by. Maybe that's what tires you, Nan," he added, and his father smiled, for he saw that Bert had two thoughts for himself, and one for his sister.