"No ordinary break," he commented. "You can see that it was an
explosive that was used--an explosive well and properly tamped
down with wet clay. Without tamping, the rails would have been
bent, not broken."

"Done by wreckers, then?" Lane asked.

"Certainly not defective rails," replied Kennedy. "Still, I don't
think you need worry so much about them for the next train. You
know what to guard against. Having been discovered, whoever they
are, they'll probably not try it again. It's some new wrinkle that
must be guarded against."

It was small comfort, but Craig was accustomed to being brutally
frank.

"Have you taken any other precautions now that you didn't take
before?"

"Yes," replied Lane, slowly; "the railroad has been experimenting
with wireless on its trains. We have placed wireless on ours, too.
They can't cut us off by cutting wires. Then, of course, as
before, we shall use a pilot-train to run ahead and a strong guard
on the train itself. But now I feel that there may be something
else that we can do. So I have come to you."

"When does the next shipment start?" asked Kennedy.

"To-morrow, from Halifax."