"You have all heard and read tales of cloaks of invisibility," explained the beaver King. "Cloaks that make the wearer invisible are famous in the fairy tales of all lands. Well, I knew that we would become invisible today against our wishes, so I have attempted to create a Cloak of Visibility--a cloak that would overcome the spell of invisibility." "Do you think it will work?" asked the Shaggy Man hopefully. "I do not know," confessed the beaver King. "I am sure it wouldn't work above ground where Glinda's Barrier of Invisibility is full strength. Underground, Glinda's spell is much less intense, because the earth and sands absorb and destroy the fairy spell. Glinda is a fairy just as Ozma is, and fairies, you know, are creatures of the light and air, and it is there that their powers are the strongest." The beaver King then handed out Cloaks of the shimmering material to all of them. There was a tiny one that fitted Twiffle perfectly. The twenty young beavers opened their knapsacks and drew from them their own Cloaks of Visibility, which they adjusted about themselves. "Now we are ready to test the power of the Cloaks," said the beaver King. "They should not only make us visible, but should enable us to see the invisible." Twink thought she detected the slightest tremor in the King's voice. It was no wonder, she thought, for so much depended on those cloaks he had made. Once again they proceeded into the tunnel, this time holding their breaths with excitement. Would the Cloaks of Visibility work? One--two--three--four--five steps and they found themselves watching one another to see if they were still visible. Six--seven--eight--nine--ten steps--but no one breathed freely until they had counted twenty steps. They all were still visible! And they could still see the tunnel walls. The Cloaks of Visibility worked perfectly. Eagerly the twenty young beavers took the lead again. CHAPTER 20 At the End of the Tunnel "Seems to me," remarked the Shaggy Man after they had progressed for some distance, "that by now we may have crossed the Barrier of Invisibility." "You're right," agreed the beaver King. "And that means we are now journeying underground in the Land of Oz. It also means that the Cloaks of Visibility are no longer necessary for our journey, so I propose that we discard them here and I will destroy them so that they may never be used by anyone else for reaching the Land of Oz." Each of the traveler removed his shimmering cloak and placed it on a little pile in the center of the tunnel. When all the cloaks were there, the beaver King waved his beechwood wand over the little heap of silvery material and in a flash it had vanished. "Seems a shame," murmured Twink, "they were so beautiful."