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!"

[Illustration: "COME ON, JIM! IT'S ALL RIGHT."]

"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 be