conducting some experiments. I hurried out and managed to locate
him.

"What is it you suspect?" I asked, when we returned. "A wreck--
some spectacular stroke at the nations that are shipping the
gold?"

"Perhaps," he replied, absently, as he and Whiting hurriedly
assembled some parts of instruments that were on a table in an
adjoining room.

"Perhaps?" I repeated. "What else might there be?"

"Robbery."

"Robbery!" I exclaimed. "Of twenty million dollars? Why, man, just
consider the mere weight of the metal!"

"That's all very well," he replied, warming up a bit as he saw
that Whiting was getting things together quickly. "But it needs
only a bit of twenty millions to make a snug fortune--" He paused
and straightened up as the gathering of the peculiar electrical
apparatus, whatever it was, was completed. "And," he went on
quickly, "consider the effect on the stock-market of the news.
That's the big thing."

I could only gasp.

"A modern train-robbery, planned in the heart of dense traffic!"