Mr. Period sent his regrets, that he could not be present at the trial, stating in his letter that he was the busiest man in the world, and that his time was worth about a dollar a minute just at present. He, however, wished Tom all success. Tom's first effort was to sail along, with the lens of the camera pointed straight toward the earth. He would thus get, if successful, a picture that, when thrown on the screen, would give the spectators the idea that they were looking down from a moving balloon. For that reason Tom was not going to fly very high, as he wanted to get all the details possible.

"All aboard!" cried the young inventor, when he had seen to it that his airship was in readiness for a flight. The camera had been put aboard, and the lens pointed toward earth through a hole in the main cabin floor. All who were expected to make the trip with Tom were on hand, Koku taking the place of Eradicate this time, as the colored man was too aged and feeble to go along.

"All ready?" asked Ned, who stood in the steering tower, with his hand on the starting lever, while Tom was at the camera to see that it worked properly.

"All ready," answered the young inventor, and, an instant later, they shot upward, as the big propellers whizzed around.

Tom at once started the camera to taking pictures rapidly, as he wanted the future audience to get a perfect idea of how it looked to go up in a balloon, leaving the earth behind. Then as the Flyer moved swiftly over woods and fields, Tom moved the lens from side to side, to get different views.

"Say! This is great!" cried Mr. Nestor, to whom air-riding was much of a novelty. "Are you getting good pictures, Tom?"

"I can't tell until we develop them. But the machine seems to be working all right. I'm going to sail back now, and get some views of our own house from up above."

They had sailed around the town of Shopton, to the neighboring villages, over woods and fields. Now they were approaching Shopton again.

"Bless my heart!" suddenly exclaimed Mr. Damon, who was looking toward the earth, as they neared Tom's house.

"What is it?" asked our hero, glancing up from the picture machine, the registering dial of which he was examining.