"It will not harm the Keystone. No, it will stop here."
Another and another rock is placed on the rails.
She knows that these boulders are a poor impediment to a wildcat car; but they are the only things available.
A whirring sound rings in her ears. It is the car rolling down the grade with the velocity of a thunder-bolt.
In a minute or two at the most, the car will be upon her.
Still she does not falter. The second pyramid must be completed.
Again she turns to look down the track. The headlight of the engine seems to be upon her. It is, in fact, just crossing the culvert.
A glance at the pile of rocks makes them appear insignificant.
"They will never be able to stop the car," she moans.
Then with a final effort she tugs at a boulder larger than any of the others. She has it on the rail when the whistling of the engine startles her.