At least, that's what they expect, I guess."
Mr. Temple nodded, but remained silent.
"But, Jack," demanded Frank, "if you are right in your surmise, then
it means that these fellows knew in advance of our coming."
"Yes," said Jack, "that's the puzzling thing about it."
"Anybody here know we were coming?" asked Bob, speaking for the first
time.
"Sure," said Jack, "Gabby Pete knew. And Rollins, father's assistant.
But you met the one, and you know he can be trusted. As for Rollins, I
don't know much about him. He's a queer, silent man. Not here tonight,
because he left early this morning to see a man on business over here
some twenty miles or so. He said he might not return tonight. But I
know father trusted him."
"Then, Jack, there is one other thing to be considered," said Bob.
"And that is, has anybody among our enemies--for I suppose we can call
them that--listened-in when we spoke by radio?"
"Of course," said Jack, "with all these amateur receiving sets in use
nowadays it is pretty hard to get absolute secrecy. But, in the first
place, since that Washington conference, the government has limited
the use of certain wave lengths. Now we are licensed to use an 1,800
metre wave length, and I imagine there are very few--at least in this
region--who could 'tap' our conversation.
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