"Well, Tom, what happened?" asked Mr. Sharp, as he saw the trio running away. "Looks as if you had had an exciting time here."  
"No, those fellows had all the excitement," declared Ned. "We had the fun." And the two lads proceeded to relate what had taken place.
 
"Tried to damage the airship, eh?" asked Mr. Sharp. "I wish I'd caught them at it; the scoundrels! But perhaps you handled them as well as I could have done."
 
"I guess so," assented Tom. "I must see if they did cut any of the wires."
 
But the young inventor and his chum had acted too quickly, and it was found that nothing had been done to the Red Cloud.
 
A little later the airship was taken out of the shed, and made ready for a trip. The gas ascension was first used, and Ned and Mr. Swift were passengers with Tom and Mr. Sharp. The machine went about a thousand feet up in the air, and then was sent in various directions, to the no small delight of a large crowd that gathered in the meadow back of the Swift property; for it only required the sight of the airship looming its bulk above the fence and buildings, to attract a throng. It is safe to say this time, however, that Andy Foger and his cronies were not in the audience. They were probably too busy removing the soot and red paint.
 
Although it was the first time Mr. Swift had ever been in an airship, he evinced no great astonishment. In fact he seemed to be thinking deeply, and on some subject not connected with aeronautics. Tom noticed the abstraction of his father, and shook his head. Clearly the aged inventor was not his usual self.
 
As for Ned Newton his delight knew no bounds, At first he was a bit apprehensive as the big ship went higher and higher, and swung about, but he soon lost his fear, and enjoyed the experience as much as did Tom. The young inventor was busy helping Mr. Sharp manage the machinery, rudders-planes and motor.
 
A flight of several miles was made, and Tom was wishing they might pay another visit to the Rocksmond Seminary, but Mr. Sharp, after completing several evolutions, designed to test the steering qualities of the craft, put back home.
 
"We'll land in the meadow and try rising by the planes alone," he said. In this evolution it was deemed best for Mr. Swift and Ned to alight, as there was no telling just how the craft would behave. Tom's father was very willing to get out, but Ned would have remained in, only for the desire of his friend.
 
With the two propellers whirring at a tremendous speed, and all the gas out of the aluminum container, the Red Cloud shot forward, running over the level ground of the meadow, where a starting course had been laid out.
 
"Clear the track!" cried Mr. Sharp, as he saw the crowd closing up in front of him. The men, boys, several girls and women made a living lane. Through this shot the craft, and then, when sufficient momentum had been obtained, Tom, at a command from the aeronaut, pulled the lever of the elevation rudder. Up into the air shot the nose of the Red Cloud as the wind struck the slanting surface of the planes, and, a moment later it was sailing high above the heads of the throng.
 
"That's the stuff!" cried Mr. Sharp. "It works as well that way as it does with the gas!"
 
Higher and higher it went, and then, coming to a level keel, the craft was sent here and there, darting about like a bird, and going about in huge circles.
 
"Start the gas machine, and we'll come to rest in the air," said the balloonist, and Tom did so. As the powerful vapor filled the container the ship acquired a buoyancy, and there was no need of going at high speed in order to sustain it. The propellers were stopped, and the Red Cloud floated two thousand feet in the air, only a little distance below some fleecy, white masses from which she took her name. The demonstration was a great success. The gas was again allowed to escape, the propellers set in motion, and purely as an aeroplane, the ship was again sent forward. By means of the planes and rudders a perfect landing was made in the meadow, a short distance from where the start had been made. The crowd cheered the plucky youth and Mr. Sharp.
 
"Now I'm ready to go on a long trip any time you are, Tom," said the aeronaut that night.
 
"We'll fit up the car and get ready," agreed the 'youth. "How about you, dad?"
 
"Me? Oh, well—er—that is, you see; well, I'll think about it," and Mr. Swift went to his own room, carrying with him a package of papers, containing intricate calculations.
 
Tom shook his head, but said nothing. He could not understand his father's conduct.
 
Work was started the next day on fitting up the car, or cabin, of the airship, so that several persons could live, eat and sleep in it for two weeks, if necessary. The third day after this task had been commenced the mail brought an unusual communication to Tom and Mr. Sharp. It was from an aero club of Blakeville, a city distant about a hundred miles, and stated that a competition for aeroplanes and dirigible balloons was to be held in the course of two weeks. The affair was designed to further interest in the sport, and also to demonstrate what progress had been made in the art of conquering the air. Prizes were to be given, and the inventors of the Red Cloud, the achievements of which the committee of arrangements had heard, were invited to compete.
 
"Shall we go in for it, Tom?" asked the balloonist.
 
"I'm willing if you are."
 
"Then let's do it. We'll see how our craft shows up alongside of others. I know something of this club. It is all right, but the carnival is likely to be a small one. Once I gave a balloon exhibition for them. The managers are all right. Well, we'll have a try at it. Won't do us any harm to win a prize. Then for a long trip!"
 
As it was not necessary to have the car, or cabin, completely fitted up in order to compete for the prize, work in that direction was suspended for the time being, and more attention was paid to the engine, the planes and rudders. Some changes were made and, a week later the Red Cloud departed for Blakeville. As the rules of the contest required three passengers, Ned Newton was taken along, Mr. Swift having arranged with the bank president so that the lad could have a few days off.
 
The Red Cloud arrived at the carnival grounds in the evening, having been delayed on the trip by a broken cog wheel, which was mended in mid-air. As the three navigators approached, they saw a small machine flying around the grounds.
 
"Look!" cried Ned excitedly. "What a small airship."
 
"That's a monoplane," declared T............