On through the night they roared. It was quite dark now, and Peggy had switched on the search light with which the aeroplane was provided. It cast a white pencil of light downward, showing the parallel bands of steel. Somewhere ahead of them, on those tracks, was the train. But how far ahead? As yet no gleam of its tail lights had come through the darkness.
All at once Peggy gave a triumphant cry.
"Look!" she cried. "It's the train!"
Far ahead gleamed two tiny red lights. They glowed through the darkness like the eyes of some wild animal. But the occupants of the aeroplane knew they were the tail lights of the train that was carrying the stolen papers to Monument Rocks.
Peggy tried to put on still more speed, but the aeroplane was doing its best. But fast as it was going, it seemed to crawl up on the train at a snail pace. The tail lights still kept far ahead.
But although the gain was slow, it was, steady. Before another dozen miles had been passed Peggy was flying above the train.
In the glare of the furnaces as the fireman jerked the doors open, Peggy could see the engineer and his mate gazing up at them with something of awe in their expressions. Aeroplanes were not as common in the far West as in the East.
Suddenly the girl noticed a figure emerge from the forward door of the front coach and clamber over the tender and drop lightly into the cab. A sudden gleam from the fire door served to light his features. Peggy recognized him instantly as the tall "romantic bandit," the one with the red sash.
The girl saw him lean toward the engineer and thrust something into his hand. It looked like a roll of bills. The next instant the train's speed perceptibly increased. It was all the aeroplane could do to keep up with it.
"He's given the engineer money, to go faster," exclaimed Wandering
William.