“That’s not to us; it’s to them.”

Terry and George sat straight, in alarm. The train had reached a short level spot, but the four cars behind were on a steep down grade and fairly leaping in pursuit. The gap rapidly closed, until, still shrieking for “Brakes,” and again for “Clear track,” old 119 sprang forward under open throttle, like a frightened horse under the spur.

Around a curve swept the train; the four cars disappeared, a moment—but here they came, full tilt, their outside wheels almost leaving the rails as they fought the tangent. Their speed had scarcely slackened. Now the train struck into a long down grade; the whistle, like the throttle, was open—but no use. Those four heavy cars roared after, unchecked, and with every yard their pace seemed to increase.

Engineer Richards was giving Number 119 all the steam that he dared, if he would keep the track. The boys’ car bounded and jerked; the pile of ties quivered; rails jingled; the whole train roared, and all the canyon was filled with clamor of wheels and whistle.

The anxious, grimy face of Terry’s father or Fireman Bill might be seen, peering backward from the cab windows, trying to measure the margin of safety, behind.

“What ails those Dutchmen, d’ you suppose?” shouted George, in Terry’s ear. “’Fraid to put on their brakes. That’s all they need do: put on their brakes.”

“Sure thing. Put on their brakes. Why don’t they put on their brakes?” Terry yelled back. “Do they want to smash us?”

The four cars were gaining; down they came, like a thunderbolt, and not a sign of their two passengers was visible.

Terry half stood, the better to see—yes, and the quicker to jump clear, if necessary; George tried to imitate him, but the train hit another curve and they both were thrown to hands and knees and barely escaped going overboard before time.

Around this curve also roared the train, throttle opened wider for the more level stretch, whistle still shrieking wildly; the four cars chased hotly—across a trestle the train boomed, and the rumble of the four cars answered instantly.