Rick grinned. "They were. We've just managed to untangle it, with your help."
"Delighted," Bennett said. "But you'll find Taylor much more of an expert than I. See you later, boys, I'm sure."
They watched as the AEC man drove off. "I'm pretty sure we have the answers," Rick said happily. "Hilleboe probably is the boss, since he owns the property, but Collins is in on it to some extent because he knew about the upper mine tunnel, and acted as agent for Hilleboe. And our pal the Frostola man is in it up to his hip pockets."
"He's the ghost," Scotty agreed. "Both in the tunnel when the machine is run, and at night when the ghost walks. At least he is part of the time. Of course there's no reason why someone else couldn't be the ghost, too, maybe two or three different people."
"Someone else was the ghost the first night," Rick remembered, "because the Frostola man was watching."
"Good thing we don't have to prove any of this," Scotty concluded. "The FBI is on the job. They'll get the proof."
"But we're the ones who'll bury the ghost for good," Rick promised.