"No," says Lawrence, shortly, for he remembers the conductor is a routine man—and, of course, of no use in such an emergency.

A moment after, he says quietly to the boy: "Miss Travenion was very good to you, Buck. Will you help me save her?"

"That's what I come for.".

"It may be a life and death matter."

"That's what I come for."

"Very well," replies Harry. "You go quietly about the train—they won't notice you—and find out what you can, and come and report to me, in Miss Travenion's car. I am going there."

"All right."

As Buck turns to obey his orders, Lawrence suddenly whispers: "No matter what happens, don't let any one of that gang learn I am on the train."

"I understand!"

Then the captain asks suddenly, "How many of them?"