Tubby grunted.

He immediately understood that Rob did not mean to include him in the party that was to try and cut the invaders off before they could recross the boundary line. Really, Tubby did not know whether to be glad or sorry. To be sure, he always wanted to have a hand in everything patriotic that was going on, which might reflect credit on the scout uniform; and in one way he would have dearly delighted in being present, should those unknown plotters be brought to book. But then it promised to prove an arduous undertaking, since all possible haste must be made; and this would necessitate driving through the brush with utter disregard as to who was tagging along at the rear of the procession, a place Tubby occupied about ten times out of ten.

Well, to be philosophical, Tubby concluded to calmly abide by whatever decision Rob arrived at. As scout leader he ought to know what was best for all concerned, and really it would be much more comfortable sitting there with the bridge guards and chatting, rather than butting up against unseen trees and getting “the map of Ireland” scratched on his face by a score of thorny bushes.

The train conductor could not think of accompanying them, though he generously told Rob to keep the lantern; this trifling sacrifice was the least thing he could do to show his deep gratitude, for it looked as though his life might have paid the penalty, only for the valor of these three scouts and Donald.

The engineer had to return with him, too, and there was an affectionate parting between Mr. McGuffey and his boy; for, despite his lame leg, Donald—that stubborn Scotch blood showing again—had concluded that he, too, wanted to be in the chase.

So Rob, Andy, Zeb and Donald, together with the lieutenant and two of his men, started off in hot haste. Too many precious minutes had already been taken up with this hunt for the hidden mine; the panic-stricken fugitives by now must be well on their way toward the border, and unless the pursuers were smart they would never overtake them in time.

One thing was in their favor: The men from the other side could not be very well acquainted with the locality. They had been able to reach the vicinity of the trestle and the bridge which they had doomed for destruction by making use of the map drawn and the aerial photographs taken by the pilot of the aeroplane, that had hovered over the railway embankment on that occasion witnessed by the scouts; but now that this near-panic had gripped them, there was a chance of becoming twisted in their bearings and losing their way.

Tubby went back to the bridge, and, making friends with several young fellows, he quickly won a way to their regard by his chummy manner. Tubby never lacked for friends because his warm heart quickly aroused a feeling of reciprocation. He was soon seated, with a number of deeply interested fellows in uniform, telling of the amazing things he, Rob and Merritt Crawford had seen—yes, and been engaged in also—when across the water in the fighting zones of Belgium and France. As none of these sturdy sons of Canada had as yet crossed, and they were all deeply interested in everything connected with the ferocious warfare going on over the sea, it can be readily understood that Tubby soon lost his humorous aspect in their eyes, induced by his rotund figure, and became a genuine hero.

Meanwhile the train had once more started, crossing the bridge in safety, thanks to the work of Rob and his chums. It was soon miles away from the danger point, heading toward the blue sea, to have its million-dollar cargo stowed in the holds of various steamers bound for the direction of the fighting fronts.

Since Rob had elected to accompany the hunting party, it must be our duty to keep track of the doings of this detachment. Donald and Zeb were called upon once more to exercise their judgment with regard to reaching the border by the shortest possible route. This would be the very path over which they had come; and in a short time Rob, upon using the lantern, decided that the fugitives had made use of another route, for there was no sign of tracks heading south. He could easily pick out their own footprints, especially those plain ones made by Tubby; but in no instance were they superseded by fresher tracks.