“Twenty thousand dollars!” said the Hawk very softly—and, without the slightest sound, he edged his body backwards to afford space for the swing of the opening door. “Twenty thousand doll——”

The word died, half uttered, on the Hawk's lips. The flashlight was illuminating the interior of the safe. On the bottom lay a single, crisp, ten-dollar counterfeit note, over the face of which was scrawled in ink—“With the Hawk's compliments!” Otherwise the safe was empty.

For a moment, like a man dazed, he stared at the counterfeit note. He could not seem to believe his eyes, Empty—the safe was empty! The diamonds were gone—gone! Gone—and these poor fools were driving an empty safe to the Master Spider—and another poor fool, with dropped jaw, was staring, gaping like an imbecile, into one! And then, a grip upon himself again, he laughed low, grimly, unpleasantly. “With the Hawk's compliments!” He had sent a bill like that once to MacVightie inscribed—“With the Hawk's compliments!” This was very neat, very clever of—somebody. Of somebody—who must have known what the Wire Devils were up to to-night! There would be no doubt in the minds of the Wire Devils, who would have heard of that little episode with MacVightie, but that the Hawk had again forestalled them, and left them a ten-dollar counterfeit bill in exchange for—twenty thousand dollars' worth of unset diamonds! Only it was this somebody, and not he, the Hawk, who was twenty thousand dollars the richer for it!

He reached in, picked up the bill to put it in his, pocket—and suddenly laid it back again, and closed and locked the safe. Why deprive the Master Spider of a little joy; and, besides, it would carry a message not perhaps so erroneous after all—for, in a flash, logically, indisputably, apparently impossible though it appeared to be on the surface, he knew who that somebody was. The shelving of the theft to the Hawk's shoulders would have defeated its own object unless the theft were committed and discovered on this particular division of the railroad where the Hawk and, incidentally, his supposed gang of desperadoes were known to be operating. The messenger certainly had not been in a drugged condition when he went on duty, and, since it was only reasonable to assume that he would have satisfied himself everything was all right at that time, it was evident, as he had given no alarm, that the contents of the safe had been intact when he took charge—whether as a “through” man in New York, or at the eastern terminus of the road, or at the last divisional point—it did not matter which. The robbery, then, had been committed while the messenger was present in the car—and it had been committed on this division. The safe had not been forced, it showed not the slightest sign of violence—it had been opened on the combination. Some one then, an expert safe-worker, in the first stages of the messenger's drugged condition, had happened into the car just ahead of him, the Hawk, and had done exactly what he, the Hawk, had intended to do?

“No,” said the Hawk. “No, I guess not.” He was wriggling noiselessly backward, and his feet were hanging out now over the end of the wagon. “No—coincidences like that don't happen—not very often!” The Hawk's head and shoulders were still under the tarpaulin, but his feet now could just feel the ground beneath them. “I guess,” said the Hawk, as he suddenly withdrew his head, and, crouching low, ran a few steps with the wagon, then dropped full length in the road, “I guess it's—the third party.”

The wagon disappeared in the darkness. The Hawk rose, and, turning, broke into a run back along the road.

He had been longer in the wagon than he had thought—it took him ten minutes to regain the railroad tracks.

Here, without pause, still running, he kept on along the right of way—but there was a hard twist to his lips, and the clenching of his fists was not wholly due to runner's “form.” How far had the Butcher taken the car before deserting it? A mile? Two miles—three? He could not run three miles under half an hour, and that would be fast over railroad ties! How long would it be before the train crew of the stalled Mail got back to Burke's Siding and managed somehow, in spite of the cut wires, to give the alarm—or how long before the dispatcher at Selkirk, with the Fast Mail reported “out” at Burke's Siding and no “O. S.” from Bradley, would smell a rat? It would take time after that, of course, before anything could be done; but, at best, the margin left for him was desperately narrow.

He ran on and on; his eyes, grown accustomed to the darkness, enabling him to pick out the ties with a fair degree of accuracy. There was not a sound save that of his own footsteps. He stopped for breath again and again; and again and again ran on at top speed. It seemed as though he had run not three miles, but six, when finally, far ahead, he caught a glow of light. The Butcher and his confederates had evidently not taken the trouble to close the side door of the car!

Instinctively, the Hawk, in caution, slowed his pace—and the next instant, smiling pityingly at himself for the act, ran on the faster. The Butcher and the other two would long since have made their getaway! There was only the messenger—and the messenger was drugged. That was all that need concern him now—the messenger—to find some way to rouse the man so that he could talk.