Rob had evidently gone as far in a line parallel with the trestle as he intended. He commenced to gradually swing around. He was bent on making that half-circuit, so as to cross the direct line of communication between the hiding place of the plotters and the railway.
They faced the west from this point on. That fact might seem of little moment, and yet it proved its value, for only because their faces were turned in that direction did they make a sudden discovery.
Something far distant was creeping up the heavens. It looked like a faint line of fire, and only for the fact that it mounted higher and higher instead of descending, Tubby would have believed it to be one of those erratic shooting stars or meteors, such as he had, like all boys, frequently watched darting athwart a summer sky at night-time.
But this was something quite different. Tubby guessed its nature even while the fiery finger still crept upward toward its zenith. It was a sky-rocket. Some patriotic Canadian was celebrating, for some cause or other, though Tubby did not happen to remember whether this was King George’s birthday, or the anniversary of the late lamented Edward’s natal day. Possibly good news had been received from across the sea. The stanch Canadian soldiers in the war trenches might have once more covered themselves with glory, and—then Tubby felt as though a frozen hand had come in contact with his heart, such was the mighty shiver that ran through his system. He had suddenly conceived another and more significant fact.
Why should that not be a signal rocket? He remembered that when abroad with his two chums, and visiting the French in the trenches, they had seen such fiery tracery against the night heavens, and understood that some commander was giving his orders; or else a spy far back of the enemy’s lines was trying to communicate some important information he had picked up.
That altered the complexion of everything, Tubby thought. These desperate men must realize what a tremendous, as well as dangerous, job they had undertaken; and consequently they would try to cover every possibility, so there might be no fluke or miscarriage of their plans.
Yes, they undoubtedly had some trusty confederate waiting at a certain station on the railway, miles to the west, whose duty it was to signal them the fact that the million-dollar munition train had just left that point, and could be expected at the bridge within a certain time, which information would allow them to have everything prepared for the grand spectacular event.
They had neglected nothing, apparently, except taking into consideration the fact that a few members of the Eagle Patrol of Boy Scouts chanced to be up in that particular section of country at the time and, as so frequently happened, were bound to get mixed up in any excitement that came along, often to their own honor and glory.
There, the rocket had burst, and yet so quickly had Tubby grasped the situation, being considerably worked up at the time, that he had arrived at a conclusion before this took place.
He plainly saw the fiery stars scatter, and imagined he could even detect the faint boom of the rocket’s bursting in midair, though Tubby would never affirm this fact positively.