why had not Mr. Damon come back ere this? Unless, as Tom feared to admit, even to himself, there had been some accident.
Half a dozen theories flashed through his mind, but he could not select a good, working one,—particuarly as there were no clues. Disappearing in an airship was the one best means of not leaving a trace behind. An auto, a motor boat, a train, a horse and carriage all these could be more or less easily traced. But an airship
If Mr. Damon wanted to cover up his tracks, or if he had been taken away, and his captors wanted to baffle pursuit, the best means had been adopted.
"Now don't you worry," advised Tom to Mrs. Damon. "I know it looks funny, but I think it will come out all right. Ned and I will do all we can. Mr. Damon must have known what he was about. But, to be on the safe side, we'll send out a general alarm through the police."
"Oh, I don't know what I'd done if you hadn't come to help me!" exclaimed Mrs. Damon.
"Just you leave it to me!" said the young inventor, cheerfully. "I'll find Mr. Damon!"
But, though he spoke thus confidently, Tom Swift had not the slightest notion, just then, of how to set about his difficult task. He had had
