balloonist was given a room next to Tom's. Then the Swift household settled down.
"Well," remarked Tom to his father as he got ready for bed, "this sure has been an exciting day."
"And my loss is a serious one," added the inventor somewhat sadly.
"Don't worry, dad," begged his son. "I'll do my best to recover those things for you."
Several days passed, but there was no clew to the thieves. That they were the same ones who had stolen the turbine model there was little doubt, but they seemed to have covered their tracks well. The police were at a loss, and, though Tom and Mr. Sharp cruised about the lake, they could get no trace of the men. The balloonist had sent to Pratonia for his clothing and other baggage and was now installed in the Swift home, where he was invited to stay a week or two.
One night when he was looking over some papers he had taken from his trunk the balloonist came over to where Tom was making a drawing of a new machine he was planning and said:
"Like to see my idea for an airship? Different from some. It's a dirigible balloon with an aeroplane front and rear to steer and balance it in big winds. It would be a winner, only for one thing. Maybe you can help me."
