The moving object defined itself clearly in the next half-minute; for the two at the derrick-heel, and for another—young Blacklock, who was crouching behind his rejected thorough-stone directly opposite the mine entrance. It took shape as the figure of a man, slouch-hatted and muffled in a long coat, creeping on hands and knees toward the farther dam-head; creeping by inches and dragging what appeared to be a six-foot length of iron pipe. The king's daughter spoke again, and this time her whisper was full of sharp agony.

"Breckenridge! it is my father—just as I have seen him before! That thing he is dragging after him: isn't it a—merciful Heaven! he is going to blow up the dam! Oh, for pity's sake can't you think of some way to stop him?"

There are crises when the mind, acting like a piece of automatic machinery, flies from suggestion to conclusion with such facile rapidity that all the intermediate steps are slurred and effaced. Ballard marked the inching advance, realised its object and saw that he would not have time to intervene by crossing the dam, all in the same instant. Another click of the mental mechanism and the alternative suggested itself, was grasped, weighed, accepted and transmuted into action.

It was a gymnast's trick, neatly done. The looped-up derrick-fall was a double wire cable, running through a heavy iron sheave which carried the hook and grappling chains. Released from its rope lashings at the mast-heel, it would swing out and across the canyon like a monster pendulum. Ballard forgot his bandaged arm when he laid hold of the sheave-hook and slashed at the yarn seizings with his pocket-knife; was still oblivious to it when the released pendulum surged free and swept him out over the chasm.


XXIII

DEEP UNTO DEEP

Mechanically as such things are done, Ballard remembered afterward that he was keenly alive to all that was passing. He heard Elsa's half-stifled cry of horror, Blacklock's shout of encouragement from some point higher up on the mesa, and mingled with these the quick pad-pad of footfalls as of men running. In mid-air he had a glimpse of the running men; two of them racing down the canyon on the side toward which his swinging bridge was projecting him. Then the derrick-fall swept him on, reached the extreme of its arc, and at the reversing pause he dropped, all fingers to clutch and tensely strung muscles to hold, fairly upon the crouching man in the muffling rain-coat.

For Blacklock, charging in upon the battle-field by way of the dam, the happenings of the next half-minute resolved themselves into a fierce hand-to-hand struggle between the two men for the possession of the piece of iron pipe. At the pendulum-swinging instant, the collegian had seen the sputtering flare of a match in the dynamiter's hands; and in the dash across the dam he had a whiff of burning gunpowder.

When the two rose up out of the dust of the grapple, Ballard was the victor. He had wrested the ignited pipe-bomb from his antagonist, and turning quickly he hurled it in a mighty javelin-cast far up the Elbow. There was a splash, a smothered explosion, and a geyser-like column of water shot up from the plunging-point, spouting high to fall in sheets of silver spray upon the two upcoming runners who were alertly springing from foothold to foothold across the dissolving mine dump.