to be rented. It's too valuable a property to let stand idle. Did you hear how long Andy was going to stay?"
"A week, I believe."
"A week! Say, one day would be enough I should think."
"You must have some special reason for being afraid Andy will do you some harm," exclaimed Ned. "Out with it, Tom."
"Well, I'll tell you what it is, Ned," and Tom led his chum inside the shop, in front of which the two lads had been talking. It was a shop where the young inventor constructed many of his marvelous machines, aircraft, and instruments of various sorts.
"Do you think some one may hear you?" asked Ned.
"They might. I'm not taking any chances. But the reason I want to be especially careful that Andy Foger doesn't spy on any of my inventions is that at last I have perfected my noiseless airship motor!"
"You have!" cried Ned, for he knew that his chum had been working for a long time on this motor, that would give out no sound, no matter at how high a speed it was run. "That's great, Tom! I congratulate you. I don't wonder you don't want Andy to get even a peep at it."
