"Thank you."

Ralph sat in the room of the assistant superintendent at Dover, an hour after taking the special into safety. He had made a brief explanation to the towerman. The freights were sidetracked, a dozen watchmen guarded the cars, as many specials were sent back to South Dover to attempt the capture of the robbers.

"Here," spoke the assistant superintendent, summoning a messenger, "take that wire for Stanley Junction. Fairbanks, do you happen to know that you have done an amazing thing?"

Ralph shook his head with an uncertain smile.

"Well, you have. I have wired the Junction that you can't go back to-night."

"But my leave of absence was only temporary."

"Don't let that disturb you at all," said the assistant superintendent. "The road needs you here at present. I fancy the road will be very likely to acknowledge your services of to-night. You have prevented the theft of half a million dollars."

Ralph started at this monstrous statement. It seemed incredible.

"That is right. The real owner of the sum will probably give you a bank calendar free, or sue the Great Northern for delay. All the same, the road feels its obligation to you, and I want you to know it. You will have to stay here till we get this matter straightened out. You see, you are the only person who can identify those robbers--if they are caught. You will stay at my home to-night."

The assistant superintendent then went over the entire matter in detail, and Ralph heard an interesting story.