"He has thousands of Winkies to keep it polished for him," explained the Wizard. "His people love to do anything in their power for their beloved Emperor, so there isn't a particle of rust on all the big castle."
"I suppose they polish their Emperor, too," said Aunt Em.
"Why, some time ago he had himself nickel-plated," the Wizard answered; "so he only needs rubbing up once in a while. He's the brightest man in all the world, is dear Nick Chopper; and the kindest-hearted."
"I helped find him," said Dorothy, reflectively. "Once the Scarecrow and I found the Tin Woodman in the woods, and he was just rusted still, that time, an' no mistake. But we oiled his joints, an' got 'em good and slippery, and after that he went with us to visit the Wizard at the Em'rald City."
"Was that the time the Wizard scared you?" asked Aunt Em.
"He didn't treat us well, at first," acknowledged Dorothy; "for he made us go away and destroy the Wicked Witch. But after we found out he was only a humbug wizard we were not afraid of him."
The Wizard sighed and looked a little ashamed.
"When we try to deceive people we always make mistakes," he said. "But I'm getting to be a real wizard now, and Glinda the Good's magic, that I am trying to practice, can never harm any one."
"You were always a good man," declared Dorothy, "even when you were a bad wizard."
"He's a good wizard now," asserted Aunt Em, looking at the little man admiringly. "The way he made those tents grow out of handkerchiefs was just wonderful! And didn't he enchant the wagon wheels so they'd find the road?"