The letter was sent from Frex to her daughter Elphaba, requesting her to help with her younger sister Nessarose Thropp - the woman who becomes the Wicked Witch of the East - who has taken her position as Eminent Thropp of Munchkinland. In the package, Frex sends Nessarose the sparkling glass covered shoes which were made by Yackle (technically, out of glass) as well as ornamented by Frex using techniques he has learned from Turtle Heart. They become a major source of conflict due to Elphaba's jealousy, as she is determined to get them back at all costs, but Dorothy is unable to remove them.