"Because the men who took mine were unprincipled fellows. Mr. Damon would not have gone away with men who would steal an airship."
"Not if he knew it," admitted Ned. "Well, then, let's consider two airships—yours and the other that came to keep the appointment with Mr. Damon. If the last is true, why should he want to go away in an airship at midnight? Why couldn't he take a train, or an auto?"
"Well, we don't know all the ins and outs," admitted Tom. "Taking a midnight airship ride is rather strange, but that may have been the only course open. We'll have to let the explanation go until later. At any rate, Mrs. Damon, I feel sure that your husband did go off through the air—either in my Eagle or in some other craft."
"Well, I'm glad to hear you say so, Tom Swift, though it sounds a dreadful thing to say. But if he did go off of his own accord, I know he did it for the best. And he may not have told me, for fear I would worry. I can understand that. But why isn't he back now?"
Tom had been rather dreading that question. It was one he had asked himself, and he had found no good answer for it. If there had been such need of haste, that an airship had to be used,
