"It's wonderful!" said Dorothy.

"Suppose we let Eureka go down to the street and get some one to help
us," suggested Zeb, who had been even more amazed than Dorothy at
these strange happenings.

"Perhaps we can walk on the air ourselves," replied the girl.

Zeb drew back with a shiver.

"I wouldn't dare try," he said.

"Maybe Jim will go," continued Dorothy, looking at the horse.

"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