This did not discourage them in the least. In fact, Donald declared he felt sure he knew how the fugitives would go, as there was only a choice between two trails, unless they lost themselves and wandered aimlessly to and fro.

Somewhere close to the border he declared it would be possible for them to make a swift turn and cut across to the other trail, upon hearing which the officer displayed considerable satisfaction.

“That sounds well to me, Donald,” he told the engineer’s son. “Put us where we can lie in ambush and surprise those fiends, and you will be doing your country the greatest possible service. I would willingly give five years of my own life for an opportunity to take those rascals and show the curs who plot to ruin our cause what it means to invade Canada from a friendly country.”

Rob, in a measure, could feel for the officer. His own indignation had kept growing the more he considered what the probable result of an explosion must have been, with that train on the trestle at the time. Yes, while scouts were not supposed to take sides with either party in the great war being waged—and Rob had shown on several notable occasions that he had a warm feeling for the German people, much as he hated the methods by means of which their leaders were conducting the campaign of frightfulness—at the same time he considered that these plotters had by their action placed themselves outside the pale of scout law. Rob looked upon them not as heroes daring deadly perils for the sake of their beloved Fatherland, but in the light of cowardly schemers who would creep up and do a terrible crime without taking any great risk themselves.

As haste was the chief object now, everything else had to give way to this one thing. It was entirely different from their former advance along this trail—when they did not know what dangers lurked about them and were compelled to move along in the semi-darkness, almost groping their way at times. Now with that lantern showing them all obstacles they made rapid progress. Besides, it almost seemed to Rob as though he were familiar with the route.

Then again a little later Rob came around to look at things in still another light. He was not inclined to be bloodthirsty, as a rule, and since the great plot had failed, perhaps it might be just as well if the men escaped. They could spread the disastrous story among their kind in the States, and thus discourage any renewal of similar activities.

They were making good time. Even Donald, limping along, managed to keep his proud position as leader of the expedition. The praise that had come his way of late, from his own father as well as others, had acted like a bracing tonic upon his entire system, and encouraged him to make further drafts upon his physical strength.

Andy, leaving all the labor of following the path to those in the lead, devoted himself to keeping a wary eye upon the surrounding forest. He cherished a faint hope that possibly the fugitives, having become lost, might think to go into camp; and if they were incautious enough to start a fire Andy wanted to be the one to spy it out first.

Nothing happened up to the time when they glimpsed that rocky cairn which marks the dividing line between Canada and the United States.

“Here is the border, sir,” said Donald to the lieutenant, “and ye ken the ither trail lies yonder toward the east. If so be we gang awa’ ower that way it is probable that we may run across the wretches.”