It was only when Bad Pete recovered his health---in jail---and found himself facing a long term in prison, that he was ready to open his mouth. He could tell nothing, however, beyond confessing that he and three other men, including an operator, had attended to the blow-out. Pete had no knowledge of the real parties behind the plot. He knew only that he had acted under ’Gene Blanks orders. So Bad Pete was shown no mercy, but sent behind the bars for a term of twenty-five years. Owing to Black’s stubborn silence the outrages were never traced back to any official of the W.C. & A. ’Gene Black was sentenced to prison for thirty years. The other rascals, who had worked under his direction, all received long terms. The student engineers, wholly happy and well paid, returned to their college. The S.B. & L. is still under the same management, and is one of the prosperous independent railroads of the United States. Dave Fulsbee continues as the head of its detective system. Tom Reade and Harry Hazelton had made good in their first professional undertaking. They were paid in proportion to their services, and given the opportunity to retain their positions at the head of the railway’s engineering corps. For some time they kept their positions, filling them always with honor. Yet, in the end, the desire to do other great things in their chosen profession led them into other fields of venture. Their greatest adventures, their severest trials and deepest problems, as well as their gravest perils were still ahead of them in their path of duty. The Young Engineers were bound to go on and up, yet their way was sure to be a stormy one. We shall meet these fine young Americans again in the next volume of this series, which is published under the title, “The Young Engineers in Arizona; Or, Laying Tracks on the Man-killer Quicksand.” It is a rousing narrative of real people and real happenings.