"Thot's all right," muttered Barney; "but will we ivver come back?"

"Look!" cried Frank, pointing downward; "there is Professor Scotch! We are already pa.s.sing over the town."

It was true; in a remarkably brief s.p.a.ce 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.

"It is a success, and my fortune is made!" he was saying. "I shall become richer than Jay Gould ever was! Ha! ha! ha! I shall not only be rich, but I shall be honored!"

"Oi don't loike th' way he is actin', Frankie," whispered Barney. "Thot laugh does not sound natural at all, at all."

"You are right," admitted Frank. "Is it possible we have started out on this kind of a cruise with a man whose brain has been turned?"

"It may be thot."

"The situation will not be at all pleasant if it turns out that way."

"He is getting control av th' ship. See how he handles her now, me b'y."

It was true that the inventor was getting control of the _Eagle_, and he was beginning to "put her through her paces," as it were. He ran before the wind, then luffed and took first one tack and then the other. The remarkable craft behaved very well.

"Ha! ha! ha!" laughed the professor, wildly. "I am the king of the air!

I am the first man to make a successful air ship. The world and all its countries are mine! I can destroy armies and change the destiny of nations! I am the greatest man who ever lived!"

"By Jove!" muttered Frank, in alarm; "I believe the man is going mad!"

"It looks loike thot," admitted the Irish boy.

"In which case, this will be the worst sc.r.a.pe we ever got into, Barney.

That is plain enough to see."

"Roight, me laddybuck! An' th' professor will soay it wur judgment on us fer runnin' away."

"He will. But we ought to be able to handle this man between us, if it comes to a struggle with him."

"We can; but can we handle th' ship afther thot, Oi dunno?"

"That is a question we cannot answer till we try the trick. But there may be no trouble at all with Scudmore if we do not anger him."

Below them lay a wild panorama of broken country, through which ran Green River to plunge deep into the winding mazes of Labyrinth Canyon, away to the southward.

Away to the west, beyond the San Rafael Swell, rose the Wasatch Mountains; being much nearer than the Rockies to the eastward, and, therefore, looking nearly as lofty.

To the north were Desolation Canyon and the Roan Cliffs, the latter rising brown and bleak at the southern boundary of the Ute Reservation.

To the south of mighty Colorado, rolling through the dark depths of canyons which seemed to sink deep into the bowels of the earth. Farther to the south, beyond the Fremont, which as yet could not be seen, Mount Pennell lifted its snow-capped summit eleven thousand feet in the air.

Mount Pennell was in the very heart of the mountain region in which the last of the Destroying Angels had found homes.

"Professor!" said Frank, speaking gently.

"Ha! ha!" muttered the inventor, as he threw over a lever and sent the _Eagle_ scooting in a breathless sweep toward the earth. "She is like a bird! Up or down, to the right or left, she will sail in any direction."

"Professor!"

"Don't bother me now--don't bother me!" he almost snarled.

"I was a fool to take you along! I should have retained all the honor for myself. Now you will share it. It will be published all over the world that you accompanied Professor Scudmore on his trial trip in his wonderful air ship."

He glared at them a moment, as if he longed to cast them overboard, and then the handling of the craft claimed his entire attention.

"How do yez loike it, Frankie, me b'y?" asked Barney, with a sly nudge at his companion.

"It is decidedly uncomfortable."

"Phwat shall we do--jump th' son-av-a-goon at wance?"

"Nothing of the sort. We will keep still, as if we are quite satisfied and content. I will draw him into conversation when I think it proper, and he may be brought round all right."

So the boys remained silent and pa.s.sive, one of them constantly watching Scudmore, so that they might not be taken by surprise, in case he took a fancy to attack them.

He continued to mutter and talk to himself, now and then laughing in a way that was not pleasant to hear.

The boys fell to wondering what the various bundles contained. Opening one of them, covertly, they found it was a supply of dried beef.

"Great shmoke!" gasped Barney. "He has laid in a supply av provisions to larrust a wake!"

Frank nodded.

"It looks that way; but these things are not all provisions. See there at his side--one of those bundles contains firearms, for you may see the muzzles of two rifles protruding. I fancy the bundle next to that contains ammunition."

"Whoy, thot's enoogh to shtock a small arumy, Frankie!"

"A man like Professor Scudmore has very little notion as to what he needs or desires, and so he is liable to obtain four or five times what is necessary."

"Are you talking of me?" harshly demanded the inventor. "Then speak up distinctly. I may think you are plotting against me--plotting to keep me from reaching the land beyond the ice."

"The land beyond the ice?" cried Frank.

"That is what I said."