"And maybe he won't!" answered Jim. "I've tumbled through the air long enough to make me contented on this roof."
"But we didn't tumble to the roof," said the girl; "by the time we reached here we were floating very slowly, and I'm almost sure we could float down to the street without getting hurt. Eureka walks on the air all right."
"Eureka weights only about half a pound," replied the horse, in a scornful tone, "while I weigh about half a ton."
"You don't weigh as much as you ought to, Jim," remarked the girl, shaking her head as she looked at the animal. "You're dreadfully skinny."
"Oh, well; I'm old," said the horse, hanging his head despondently, "and I've had lots of trouble in my day, little one. For a good many years I drew a public cab in Chicago, and that's enough to make anyone skinny."
"He eats enough to get fat, I'm sure," said the boy, gravely.
"Do I? Can you remember any breakfast that I've had today?" growled Jim, as if he resented Zeb's speech.
"None of us has had breakfast," said the boy; "and in a time of danger like this it's foolish to talk about eating."
"Nothing is more dangerous than being without food," declared the horse, with a sniff at the rebuke of his young master; "and just at present no one can tell whether there are any oats in this queer country or not. If there are, they are liable to be glass oats!"
"Oh, no!" exclaimed Dorothy. "I can see plenty of nice gardens and fields down below us, at the edge of this city. But I wish we could find a way to get to the ground."
"Why don't you walk down?" asked Eureka. "I'm as hungry as the horse is, and I want my milk."
"Will you try it, Zeb" asked the girl, turning to her companion.
Zeb hesitated. He was still pale and frightened, for this dreadful adventure had upset him and made him nervous and worried. But he did not wish the little girl to think him a coward, so he advanced slowly to the edge of the roof.
Dorothy stretched out a hand to him and Zeb put one foot out and let it rest in the air a little over the edge of the roof. It seemed firm enough to walk upon, so he took courage and put out the other foot.
Dorothy kept hold of his hand and followed him, and soon they were both walking through the air, with the kitten frisking beside them.
"Come on, Jim!" called the boy. "It's all right."
Jim had crept to the edge of the roof to look over, and being a sensible horse and quite experienced, he made up his mind that he could go where the others did. So, with a snort and a neigh and a whisk of his short tail he trotted off the roof into the air and at once began floating downward to the street. His great weight made him fall faster than the children walked, and he passed them on the way down; but when he came to the glass pavement he alighted upon it so softly that he was not even jarred.
"Well, well!" said Dorothy, drawing a long breath, "What a strange country this is."
People began to come out of the glass doors to look at the new arrivals, and pretty soon quite a crowd had assembled. There were men and women, but no children at all, and the folks were all beautifully formed and attractively dressed and had wonderfully handsome faces.
There was not an ugly person in all the throng, yet Dorothy was not especially pleased by the appearance of these people because their features had no more expression than the faces of dolls. They did not smile nor did they frown, or show either fear or surprise or curiosity or friendliness. They simply started at the strangers, paying most attention to Jim and Eureka, for they had never before seen either a horse or a cat and the children bore an outward resemblance to themselves.
Pretty soon a man joined the group who wore a glistening star in the dark hair just over his forehead. He seemed to be a person of authority, for the others pressed back to give him room. After turning his composed eyes first upon the animals and then upon the children he said to Zeb, who was a little taller than Dorothy:
"Tell me, intruder, was it you who caused the Rain of Stones?"
For a moment the boy did not know what he meant by this question.
Then, remembering the stones that had fallen with them and passed them long before they had reached this place, he answered:
"No, sir; we didn't cause anything. It was the earthquake."
The man with the star stood for a time quietly thinking over this speech. Then he asked:
"What is an earthquake?"
"I don't know," said Zeb, who was still confused. But Dorothy, seeing his perplexity, answered:
"It's a shaking of the earth. In this quake a big crack opened and we fell through--horse and buggy, and all--and the stones got loose and came down with us."
The man with the star regarded her with his calm, expressionless eyes.
"The Rain of Stones has done much damage to our city," he said;
"and we shall hold you responsible for it unless you can prove your innocence."
"How can we do that?" asked the girl.
"That I am not prepared to say. It is your affair, not mine.
You must go to the House of the Sorcerer, who will soon discover the truth."
"Where is the House of the Sorcerer?" the girl enquired.
"I will lead you to it. Come!"
He turned and walked down the street, and after a moment's hesitation Dorothy caught Eureka in her arms and climbed into the buggy. The boy took his seat beside her and said: "Gid-dap Jim."
As the horse ambled along, drawing the buggy, the people of the glass city made way for them and formed a procession in their rear. Slowly they moved down one street and up another, turning first this way and then that, until they came to an open square in the center of which was a big glass palace having a central dome and four tall spires on each corner.
