"If we ride straight for them, how far do you think we'll be from the water tank ?" he asked.
"Mebbe one mile, mebbe two," replied Injun, who seldom committed himself to an exact answer.
"That's all right, come on!" cried Whitey, and they galloped straight for the railroad.
When they reached the tracks, they dismounted and tied their ponies to neighboring telegraph poles, fearing the effect the noise of the train would have on the spirited animals.

Then the boys went to the roadbed to await the coming of the train.

The line stretched straight toward the west, until the rails seemed to join in the distance.

But toward the east was a curve as the road approached a gully, at the bottom of which was a creek.

It was from this creek that the water was drawn for the tank.
The sunrise had seemed to promise a fair day, but the promise failed, for a mist was forming over the plains.