I started the hydrodyne generators at their full capacity, and then threw the switch. As the half-million horse-power went through the resistance coils, jets of super-heated steam roared out of the nozzles, condensing in white rushing clouds. The terrific force of the jets uprooted the purple trees, and the machine vibrated to the mighty blast. I was hurled into the air. With a speed that swiftly increased to many hundreds of miles per hour, I hurtled the broad plain, and over the ghostly white city of silver—and into the abyss!

The plateau ended abruptly as if cut off with a knife. The crater fell sheer away before me, stretching to the vast blue cliffs in the north, and to the line of living purple and green that marked the beginning of the eastward forests. Only a thin green line separated the abyss from the lake on the south, which, in the reflected light of the scarlet sky, horribly suggested a sea of blood, ready to flow into the pit.

Undoubtedly the crater was of volcanic origin. I could not determine its depth, nor the state of its floor—it was filled with the thick crimson mist. The wavering tongues of violet fire still flickered through it, throbbing strangely, like the reflection of fires below—hinting unpleasantly of alien life.

As the rich green plain vanished beneath me, and I sped high over that busy strange white city and into the haze of the abyss, an odd feeling of the wildness and the unfamiliar terror of the place stole over me again. I was very thankful for the invention of Sam's, for the thin helmet of wire gauze above my head!

Suddenly a great twisting bar of green fire writhed up, like a serpent's head, from the nest of flames. It swung and coiled and twisted through the rosy mists with a slow, deliberate motion, like an incredible reptile of flame, raising its head, looking, searching! Despite the helmet, great fear swept my brain like a hot flame!


CHAPTER XXVIII

The Flaming Brain

Mighty winds whipped about me. The roaring jets of steam drove the throbbing machine on over the rosy mists, and over the flickering violet flames. And I fell—dropped into the hidden pit. Vividly I saw the great writhing head of green rising above the fire-fog ahead, with that in its waving, serpentine motion that told me that its eyes were already upon me! I was certain that it was a living, sentient entity, that it was intelligent!

Could my weapons avail against it?