"Oh, I noticed that, all right, even if I didn't look your way,"
returned Andy, promptly. "It sort of clinched the nail we drove through
didn't it, Frank?"

"Seems like it," the other went on to remark. "And the chances are ten
to one, we've got the story down fine right now, know who one of the
robbers was, why they wanted to steal an aeroplane to make their
get-away in, and all that. But there are a few things we don't know,
that'd throw a little more light on the affair."

"As what?" queried his cousin.

"Well, for one thing, the Chief seemed to think the thieves might have
had inside information, they seemed to know so much about things
connected with the bank, our having an aeroplane, where we lived, what
our habits were, and then about Percy's biplane in the bargain. Now,
that's something serious; if there's a man in Bloomsbury who's in league
with such rascals he'll be apt to help them out again later on if they
get away with this job; and he ought to be found out."

"Whew! looks like we've got a big job on our hands if we hope to do all
that sort of thing," commented Andy, with a whistle to indicate his
feelings.

"Nobody said we even think of trying," laughed Frank, as he stopped
mounting upward in spirals, and headed away toward the north.

It was a glorious view that they had now spread out beneath and around
them. Neither of the Bird boys ever tired of such wonderful sights; and