cymbals, a smiting of great gongs, and a climacteric roar from those agonizing trumpets of hell. Then even the single altar light went out, plunging the great hall into darkness.
Instantly I felt Dr. Gresham's hand upon my arm, and, dazed and helpless, I was dragged out of the temple.
Outside the air released me from my stupor, and I raced beside the scientist to the spot where we had left our outer garments. In the shadow of the wall we slipped these on, and then fled panic-stricken down the mountainside.
CHAPTER VIII.
THE JAWS OF DEATH
WE did not pause in our flight from the temple until we reached the foot of the mountain; then, still shaken by the horror of the scene we had witnessed, we sat down to rest until the climbing moon should send its light into the depths of the gorge.
We could discern little of our surroundings, but close at hand we could hear the river rushing between its rocky walls.
Not a word was spoken until finally I inquired: "What next?"
In a low voice that indicated the need of caution even here, Dr. Gresham announced:
"The real work of the night still is before us. I would not have taken the risk of visiting the temple but for the hope that we would learn more of the Seuen-H'sin's layout than we did. Since nothing was gained there, we must reconnoiter the country."
"That sacrifice of human life," I asked—"what was its purpose?"
"To propitiate their god," the astronomer told me. "Every month, on the night of the full moon—in every Seuen-H'sin temple in the world—that hideous slaughter takes place. At certain times the ceremony is elaborated into a thing infinitely more horrible."
At this juncture the moon lifted itself clear of the valley's eastern rim, and the depression was bathed in silvery radiance. This was the signal for our start.
Heading toward the sound of the river, we soon came to the road that led to the Nippon's wharf. Beside this highway was an electric transmission line, running on up into the canyon. Turning away from the wharf and the village, we proceeded to follow this line toward its source.
Instead of traversing the road, however, we kept in the shadows of the timber at its side; and it was well that we did so, for we had not gone far before a group of Chinamen appeared around a bend in the highway, walking rapidly toward the town. They wore dark clothes of the same pattern as our own outer garments; and they passed without seeing us.
For fully two miles we followed the power line, until we began to pass numerous groups of Chinamen in close succession—like crowds of men getting off work.
To diminish the chance of our being discovered, Dr. Gresham and I turned up the mountainside. We climbed until we had reached a considerable height above the floor of the gorge, and then, keeping at this elevation, we again pursued the course of the electric line.
Another half-hour passed in this scramble along the steep slope, and my companion began to betray uneasiness lest the road and its paralleling copper wires, which we could not see from here, had ended or had turned off up some tributary ravine—when suddenly there came to our ears a faint roaring, as of a distant waterfall. At once Dr. Gresham was all alertness, and with quickened steps we pressed forward in the direction of the sound.
Five minutes later, as we rounded a shoulder of the mountain, we were stricken suddenly speechless by the sight, far below us, of a great, brilliantly lighted building!
For a few moments we could only stand and gaze at the thing; but presently, as the timber about us partly obstructed our view, we moved forward to a barren rocky promontory jutting out from the mountainside.
The moon now was well up in the heavens, and from the brow of this headland a vast expanse of country was visible, its every feature standing out almost as clearly as in the daylight. But, to take advantage of this view, we were obliged to expose ourselves to discovery by any spies the Seuen-H'sin might have posted in the region. The danger was considerable, but our curiosity regarding the lighted building was sufficient to outweigh our caution.
The structure was too far distant to reveal much to the naked eye, so we quickly brought our field glasses into use; then we saw that the building was directly upon the bank of the river, and that from its lower wall spouted a number of large, foaming streams of water, as if discharged under terrific pressure. From these torrents, presumably, came the sound of the waterfall. The angle at which we were looking down upon the place prevented our seeing inside the building except at one corner, where, through a window, we could catch a glimpse of machinery running.
But, little as we could see, it was enough to convince me that the place was a hydro-electric plant of enormous proportions, producing energy to the extent of probably hundreds of thousands of horsepower.
Even as I was reaching this conclusion, Dr. Gresham spoke:
"There," he said, "is the source of the Seuen-H'sin's power, which is causing all these upheavals throughout the world! That is where the yellow devils are at work upon their second moon!"
Just as he spoke another of the great ground-shocks rocked the earth. Too much amazed for comment, I stood staring at the plant until my companion added:
"There is where those brilliant flashes in the heavens came from last night. They were due to some accident in the machinery, causing a short circuit. For two nights I had been circling over this entire range of mountains in the hydroplane, in search of the sorcerers' workshop. The flashes were a fortunate circumstance that led me to the place."
"At last I understand," I remarked presently, "why you were so deeply interested, back there in Washington, in the steamship Nippon and the electric plant she was transporting to Hong-kong. I suppose that is where the sorcerers obtained all this machinery!"
"Precisely!" agreed the astronomer. "That morning in Washington, when I got you to look up the inventory of the Nippon's cargo, I had this solution of the mystery in mind. I knew from my years in Wu-yang that electricity was the force the sorcerers would employ, and I was certain I had seen mention in the newspapers of some exceptionally large electrical equipment aboard the Nippon. Those supposed pirates of the Yellow Sea were in reality the murderous hordes of the Seuen-H'sin, who had come out to the coast after this outfit."
"But why," I asked, "should these Chinamen, whose development of science is so far in advance of our own, have to get machinery from an inferior people? I should think their own appliances would have made anything from the rest of the world seem antiquated."
"You forget what I told you that first night we spoke of the Seuen-H'sin. Their discoveries never were backed up by manufacturing; they possessed no raw materials or factories or industrial instincts. They did not need to make machinery themselves. In spite of their tremendous isolation, they were watching everything in the outside world. They knew they could get plenty of machinery ready made—once they had perfected their method of operations."
