As we neared the cruiser I rose as though to pass above her, so that she would do just what she did do, rise at a steeper angle to force me still higher. Then as we were almost upon her I yelled to my companions to hold tight, and throwing the little vessel into her highest speed I deflected her bows at the same instant until we were running horizontally and at terrific velocity straight for the cruiser's keel.

Her commander may have seen my intentions then, but it was too late. Almost at the instant of impact I turned my bows upward, and then with a shattering jolt we were in collision. What I had hoped for happened. The cruiser, already tilted at a perilous angle, was carried completely over backward by the impact of my smaller vessel. Her crew fell twisting and screaming through the air to the water far below, while the cruiser, her propellers still madly churning, dived swiftly headforemost after them to the bottom of the Sea of Omean.

The collision crushed our steel bows, and notwithstanding every effort on our part came near to hurling us from the deck. As it was we landed in a wildly clutching heap at the very extremity of the flier, where Xodar and I succeeded in grasping the hand-rail, but the boy would have plunged overboard had I not fortunately grasped his ankle as he was already partially over.

Unguided, our vessel careened wildly in its mad flight, rising ever nearer the rocks above. It took but an instant, however, for me to regain the levers, and with the roof barely fifty feet above I turned her nose once more into the horizontal plane and headed her again for the black mouth of the shaft.

The collision had retarded our progress and now a hundred swift scouts were close upon us. Xodar had told me that ascending the shaft by virtue of our repulsive rays alone would give our enemies their best chance to overtake us, since our propellers would be idle and in rising we would be outclassed by many of our pursuers. The swifter craft are seldom equipped with large buoyancy tanks, since the added bulk of them tends to reduce a vessel's speed.

As many boats were now quite close to us it was inevitable that we would be quickly overhauled in the shaft, and captured or killed in short order.

To me there always seems a way to gain the opposite side of an obstacle. If one cannot pass over it, or below it, or around it, why then there is but a single alternative left, and that is to pass through it. I could not get around the fact that many of these other boats could rise faster than ours by the fact of their greater buoyancy, but I was none the less determined to reach the outer world far in advance of them or die a death of my own choosing in event of failure.

"Reverse?" screamed Xodar, behind me. "For the love of your first ancestor, reverse. We are at the shaft."

"Hold tight!" I screamed in reply. "Grasp the boy and hold tight—we are going straight up the shaft."

The words were scarce out of my mouth as we swept beneath the pitch-black opening. I threw the bow hard up, dragged the speed lever to its last notch, and clutching a stanchion with one hand and the steering-wheel with the other hung on like grim death and consigned my soul to its author.