"Emp'ror? Oh, it's something like an alderman, I guess."
"Oh," said the boy.
"But I thought Princess Ozma ruled Oz," said the shaggy man.
"So she does; she rules the Emerald City and all the four countries of Oz; but each country has another little ruler, not so big as Ozma. It's like the officers of an army, you see; the little rulers are all captains, and Ozma's the general."
By this time they had reached the trees, which stood in a perfect circle and just far enough apart so that their thick branches touched—or "shook hands," as Button-Bright remarked. Under the shade of the trees they found, in the center of the circle, a crystal pool, its water as still as glass. It must have been deep, too, for when Polychrome bent over it she gave a little sigh of pleasure.
"Why, it's a mirror!" she cried; for she could see all her pretty face and fluffy, rainbow-tinted gown reflected in the pool, as natural as life.
Dorothy bent over, too, and began to arrange her hair, blown by the desert wind into straggling tangles. Button-Bright leaned over the edge next, and then began to cry, for the sight of his fox head frightened the poor little fellow.
"I guess I won't look," remarked the shaggy man, sadly, for he didn't like his donkey head, either. While Polly and Dorothy tried to comfort Button-Bright, the shaggy man sat down near the edge of the pool, where his image could not be reflected, and stared at the water thoughtfully. As he did this he noticed a silver plate fastened to a rock just under the surface of the water, and on the silver plate was engraved these words:
THE TRUTH POND
"Ah!" cried the shaggy man, springing to his feet with eager joy; "we've found it at last."