Reade & Hazelton undertook the task.
Incidentally Tom came into serious, dangerous conflict with gamblers and other human birds-of-prey, who had heretofore fattened on the earnings of the railway laborers.

It was a tremendously exciting time that the young engineers had in Arizona, but they at last got away with their lives and were at the same time immensely successful in their undertaking.
In "_The Young Engineers In Nevada_" we found our young friends under changed conditions.

While at work in Colorado and in Arizona Tom and Harry had studied the occurrence of precious ores, and also the methods of assaying and extracting ores.

Having their time wholly to themselves after finishing in Arizona the dauntless young pair went to Nevada, there to study mining at first hand.

In time they located a mining claim, though there were other claimants, and around this latter fact hung an extremely exciting story.