"You are Bayard Alexander," he said, "and my prisoner."

The cashier was, after all, surprised. He was not aware that he was being followed. He sprang forward in his chair but met the glint of a pistol in the hand of the special agent.

"And you? Oh, I see!" said the cashier, recovering himself. "The bookkeeper was not a bookkeeper after all."

"I am an agent of the Department of Justice," said Gard. "You are under arrest."

The tall figure of the cashier had risen from its chair. To the traveling bag he clung instinctively. The situation seemed entirely in the control of the special agent with gun drawn and the retreat cut off. Yet, like a flash, the cashier turned the knob of the door that led out upon the rear platform of the observation car. The gun of the special agent spit forth a flame, but whether he had intended to bring down his man or not he was afterward quite unable to recall.

But with a leap he was after and upon the fugitive. He suspected the intent of the cashier to throw himself from the train, to end all in suicide. He saw the traveling bag getting beyond his reach. It was the last thing that would have appealed to him to stand idly by while such incidents were taking place.

The two men grappled. A new purpose flashed into the mind of the cashier. Here was he given an unexpected opportunity for freedom. Only the special agent stood in his way. If he could but drop this youngster over the rail, suicide would be unnecessary. A new purpose came into his tall, lithe form. It was to be put to the task of fighting for its own preservation.

And such a setting for a fight! The clamor of the train beat into the blood of the contestants like the applause of an arena. The swish of the platform as the express dashed through the darkness at seventy miles an hour made the ordinary strategy of battle uncertain. Beyond the narrow rail that skirted this platform upon which their fight was staged death waited expectant on three sides. There were now no weapons and the contestants went back to the primal in a tooth and fang grapple for existence as might two frenzied bears at bay.

The cashier was the larger man and one who had always kept in condition through gymnasium work. The special agent was lither and younger. The larger man was determined that he would thrust the smaller over the rail and fling him from the train. He fought his way to the edge of the platform, forcing his antagonist farther and farther over it, hammering him down by the sheer superiority of weight and strength.

But all the time the special agent was playing to his own advantage. He was getting low beneath the guard of the cashier. His arms had found an iron lock beneath his antagonist's coat and about his waist. He felt that this hold could not be broken and that a time would come when the strength of the larger man would wane. He could afford to wait.