"The plans, father!" Tom exclaimed. "The plans I left on the table! Where are they?"
"I haven't touched them," was the answer. "They were on that table, where you put them, when I closed my eyes for a little nap. I forgot all about them. Are you sure they're missing?"
"They're not here!" And Tom gazed wildly about the room. "Where can they have gone?"
"I wasn't out of my chair," said Mr. Swift. "I ought not to have gone to sleep, but———"
Torn fairly jumped toward the long library window, the same one from which he had leaped to pursue Andy Foger. The casement was open, and Tom noted that the screen was also unhooked. It had been closed when he went to get the model, he was sure of that.
"Look, dad! See!" he exclaimed, as he picked up from the floor a small piece of paper.
"What is it, Tom?"
"A sheet on which I did some figuring. It is no good, but it was in with the plans. It must have dropped out."
"Do you mean that some one has been in here and taken the plans of your new aeroplane, Tom?" gasped his father.
"That's just what I mean! They sneaked in here while you were dozing, took the plans, and jumped out of the window with them. On the
