He said it was important for the endeavor to be kept as secret as possible, as it might fail, and the government might wish to attempt it in some other direction. He explained to the conductor as he had explained to the sheriff, that the Secret Service was not entirely certain about its information, and that the undertaking was in a certain sense precautionary; nevertheless, nothing must be neglected that might insure its success.
He pointed out that the fewest possible persons ought to be permitted to know anything about it; that the train should go on, precisely on its schedule; that nothing must be done to give any official an idea of what was in hand; and, of course, no passengers on the train must have any information as to what was about to take place. The stop at this station was one of the briefest, and Mooney hurried everybody into the train.
White, who had come on this train, now joined us, and Mooney explained to the conductor what course he wished to pursue. The plan of the Department was to effect the capture of the men who would undertake to hold up the train at the coal tipple. He pointed out that these bandits would enter the express car, as it was the sealed express against which their endeavor would be directed. He said that he, and his two men, would take charge of the express car, that the express agent should go to the rear of the train and act with the sheriff as a reserve force. In this difficult matter he preferred to have with him only the trained Secret Service men, who were accustomed to things of this sort. He said the express agent, or untrained persons, would be of no benefit to him; they, in fact, constituted a menace.
When the train moved out of the station the whole party went forward to the express car.
The sheriff and conductor explained the matter to the express agent, and introduced Mooney. Strange as it may seem, the express agent was less astonished than any of the others had been. He was aware of the holdups that had taken place throughout the country and he was, in fact, expecting something of the sort to happen. He had a short riot pump gun lying on the top of the safe and a big Colt revolver in his pocket.
Mooney here took charge of the matter without any further consultation with anybody. He told the express agent to go to the rear of the train with the sheriff. They were not to do anything unless they received a signal from Mooney.
This was the plan and it was immediately put into effect by Mooney.
But before the express agent left the car Mooney told him that he wanted to place a package of marked bills in the safe. It might happen, by some accident, that the bandits attacking the train would get the best of it. In such event the package of marked bills would serve in tracking them down. He said this precaution had been determined upon by the Department in all cases.
He produced an envelope—a brown manila envelope—sealed and stamped with red wax, and handed it to the express agent. The agent squatted down by the safe, opened it quickly, and put the envelope in among the other packages; then he closed the safe and locked it.
This device gave Mooney the combination to the safe.