"What in the world can that be?" gasped Twink.
The Airmobile was moving very slowly as they approached the sky village. Directly before them, on what would have been the outskirts of the town, had it been on the earth, was a sign reading:
YOU ARE NOW ENTERING HIGHTOWN
Population—522
Altitude—approximately 15,000 feet (but it varies)
They could see people walking about among the houses, just as though they were on solid ground.
The Shaggy Man shook his head.
Twink and Tom were staring, fascinated.
The Airmobile glided silently a few feet past the sign. Then it jerked several times and came to an abrupt halt.
Twiffle looked puzzled. He pushed one button, then another, and another. Nothing happened. Twiffle did it all over again, a bit frantically this time. Still nothing happened.
"It's no use," said Twiffle. "The Airmobile won't budge. We're stuck in mid-air!"