Up shot the air ship.
"Ha! ha! ha!" laughed the inventor. "Who said I would fail! We are off!"
"Thot's all right," muttered Barney; "but will we ivver come back?"
"Look!" cried Frank, pointing downward; "there is Professor Scotch! We are already passing over the town."
It was true; in a remarkably brief space of time the air ship had sailed out of the glen and was rising above the town. Looking downward, they saw Professor Scotch and a number of persons, including Walter Clyde and two rough-looking companions, staring up at the Eagle.
"Good-by, professor," shouted Frank, leaning out of the car and waving his hat. "We're off in search of the last of the Danites."
They saw the professor dance wildly around and beckon to them. Then his voice came faintly to their ears:
"Here, here, you rascals! come right back here this minute! If you don't, I shall have to——"
They could understand no more, for the swiftly rising air ship carried them beyond the reach of his voice.
Professor Scudmore was chuckling to himself, as he worked at the apparatus which controlled the sails and rudders.