"
"A white cloth," mused Joe. "From his pocket. Was it his handkerchief,
Blake?"
"He wouldn't have one as large as that, even if he suffered from hay
fever. I think it was a signal."
"A signal for what?" Charlie again asked.
"To tell the submarine some piece of news, of course--perhaps the port
of sailing, something of the nature of our cargo, or perhaps to tell
just where to send the torpedo. I understand we are carrying some
munitions, and it may be that this German spy directed the commander of
the submarine where to aim the torpedo so as to explode them."
"But he'd be signaling for his own death warrant!" cried Joe.
"Not necessarily," answered Blake. "He may have had some understanding
with the submarine that he was to be saved first. Perhaps he was going
to jump overboard before the torpedo was fired and was to be picked up.
Anyhow, I saw him draping a white cloth over the side, and I'm sure it
was a signal."
"Well, I guess you're right," said Joe. "The next question is, what's to
be done? This fellow is a spy and a traitor, and we ought to expose
him."
"Yes," agreed Blake. "But we'd better have a little more evidence than
just my word. You fellows didn't see what I saw, that's plain, and
perhaps no one else did.
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