“Some magnetic phenomenon.” I was half angry at myself for my own touch of panic. “Light can be deflected by passage through a magnetic field. Of course that's it. Certainly.”
“I don't know.” Drake's tone was doubtful indeed. “It would take a whale of a magnetic field to have done THAT—it's inconceivable.” He harked back to his first idea. “It was so—so DAMNED deliberate,” he repeated.
“Devils—” muttered the frightened Chinese.
“What's that?” Drake gripped my arm and pointed to the north. A deeper blackness had grown there while we had been talking, a pool of darkness against which the mountain summits stood out, blade-sharp edges faintly luminous.
A gigantic lance of misty green fire darted from the blackness and thrust its point into the heart of the zenith; following it, leaped into the sky a host of the sparkling spears of light, and now the blackness was like an ebon hand, brandishing a thousand javelins of tinseled flame.
“The aurora,” I said.
“It ought to be a good one,” mused Drake, gaze intent upon it. “Did you notice the big sun spot?”
I shook my head.
“The biggest I ever saw. Noticed it first at dawn this morning. Some little aurora lighter—that spot. I told you—look at that!” he cried.
The green lances had fallen back. The blackness gathered itself together—then from it began to pulse billows of radiance, spangled with infinite darting swarms of flashing corpuscles like uncounted hosts of dancing fireflies.