Once more they paused, somewhat discouraged, but in a moment the button eyes of Scraps again discovered the city, only this time it was just behind them in the direction from which they had come.

"Goodness gracious!" cried Dorothy.

"There's surely something wrong with that city.

Do you s'pose it's on wheels, Wizard ?" "It may not be a city at all," he replied, looking toward it with a speculative glance.
"What COULD it be, then ?" "Just an illusion." "What's that ?" asked Trot.
"Something you think you see and don't see." "I can't believe that," said Button-Bright.

"If we only saw it, we might be mistaken, but if we can see it and hear it, too, it must be there." "Where ?" asked the Patchwork Girl.
"Somewhere near us," he insisted.
"We will have to go back, I suppose," said the Woozy with a sigh.
So back they turned and headed for the walled city until it disappeared again, only to reappear at the right of them.