Moving under water more slowly than on the surface, the submarine gradually approached the island and halted with its bow pressed against the huge marble door in the basement under the Dome.

This door was tightly closed and it was evident to both Glinda and the Wizard that it would not open to admit the underwater boat unless a magic word was spoken by them or someone from within the basement of the island.

But what was this magic word?
Neither of them knew.
"I'm afraid," said the Wizard regretfully, "that we can't get in, after all.

Unless your sorcery can discover the word to open the marble door." "That is probably some word only known to Coo-ce-oh," replied the Sorceress.

"I may be able to discover what it is, but that will require time.