d had little doubt that this would prove to be the unauthorized
station of which the radio man was in search.

He must have read something of this in their expression, for he looked
searchingly from one to another.

"Looks to me as though you fellows knew something," he remarked. "I
might have known if there was anything going on in the radio line within
fifty miles of where you are that you'd know something about it."

"Well, I've got a hunch that we could lead you right to the place you're
looking for," said Bob quietly.

"What?" shouted Brandon, leaping excitedly to his feet. "Do you really
mean that? Tell me all about it."

For the second time that evening Bob recounted the happenings of their
eventful excursion, while the radio inspector listened intently,
throwing in a question here and there. When Bob had finished he made no
comment for a few minutes.

Then he took the copy of the code and examined it intently, jotting down
phrases here and there in his own notebook.

"Well," he said at length, "this looks to be a much bigger thing than I
had supposed. Of course I heard of the robbery of the motor-truck, but I
never for a moment connected that with this sending station we've been
looking for. It seems fairly evident, though, that if we can lay our
hands on the operators of the unauthorized sending outfit, we'll also
have the perpetrators of that hold-up. This is a case where we'll have
to think out every move before we act."

"Just before you arrived I was considering the advisability of putting
the matter into the hands of the police," said Mr. Fennington. "What
would you do?"

"Keep the whole thing to ourselves for the present," said Mr. Brandon
decisively. "I'll send for a couple of good men to come up here and help
me, and we'll keep a watch on that cabin for a few days. If this thing
got into the papers, it would put the crooks on their guard, and
probably spoil our chances of catching them and getting back the loot.
I've got a small but extremely efficient receiving and sending set in my
car, and if any more code messages are sent out we'll catch them."

His confidence was contagious, and the boys felt almost as though the
capture of the criminals had already been accomplished.

"What puzzles me, though," remarked Mr. Fennington, "is how you knew
that there was an unauthorized radio sending station in this
neighborhood, Mr. Brandon. I should think it would be almost impossible
to locate such a