Steam engines cannot be used in those tunnels for obvious, as
well as legal, reasons. They are all wonderful machines, using
third-rail power.

"But that Jandel patent that Mr. Bartholomew is using out there
on the H. & P. A. is probably the highest type of such motors. It
is up to us to beat that. Fortunately I got a pass into the
Jandel shops a few months ago and I studied at first hand the
machine Mr. Bartholomew is using."

"Isn't that great!" cried Mary.

"Well, it helps some. I at least know in a general way the
'how' of the construction of the Jandel locomotive. It is simple
enough. Too simple by far, I should say, to get both speed and
power. We'll see," and he nodded his head thoughtfully.

Tom did not stay long with the girl, for it was already late in
the evening when he had arrived at her house. As he got up to
depart Mary's anxiety for his safety revived.

"I wish you would take care now, Tom. Those men may hound you."

"What for?" chuckled the young inventor. "They have the notes
they wanted."

"But that very thing--the fact that you fooled them--will make
them more angry. Take care."

"I have a means of looking out for myself, after all," said Tom