Glinda of Oz Chapter 20 - A Puzzling Problem

In which Glinda the Good uses her magical talents, aided by the little Wizard of Oz, to command a stranded submarine and attempt to reach the sunken island where friends are held captive, yet they find themselves thwarted by a mysterious marble door requiring a secret magic word. As Glinda sets up a comfortable camp for her companions and persists in puzzling over the enchantment, unexpected visitors arrive bearing a grace and purpose that may offer new hope.