I opened my eyes. Alan was lying inert beside me, roped and with a black gag around his face and in his mouth. We were in a huge dim open space. Presently, as my vision cleared, I saw that the dome was overhead. This was a circular, hundred-foot-wide room. It was dimly lighted. The figures of men were moving about, their great misshapen shadows shifting with them. Twenty feet from me there was a pile of golden rock--chunks of gold the size of a man's fist, or his head, and larger, heaped loosely into a mound ten feet high. Beyond this pile of ore, near the center of the room, twenty feet above the concrete floor, there was a large hanging electrolier. It cast a circular glow downward. Under it I saw a low platform raised a foot or two above the ground. A giant electro-microscope was hung with its twenty-foot cylinder above the platform. Its intensification tubes were glowing in a dim phosphorescent row on a nearby bracket. A man sat in a chair on the platform at the microscope's eyepiece. I saw all this with a brief glance, then my attention went to a white stone slab under the giant lense. It rested on the platform floor, a two-foot-square surface of smooth white stone like marble. A little roped railing a few inches high fenced it. And in its center lay a fragment of golden quartz the size of a walnut! There was a movement across my line of vision. Two figures advanced. I recognized both of them. And I strained at my bonds; mouthed the gag with futile, horrified effort. I could no more than writhe; and I could not make a sound. I lay, after a moment exhausted, and stared with horror. The familiar hunched figure of Polter advanced toward the microscope. And with him, his huge hand holding her wrists, was Babs. They were nearly fifty feet from me, but with the light over them I could see them clearly. Bab's slim figure was clad in a long skirted dress--pale blue, now, with the light on it. Her long black hair had fallen disheveled to her shoulders. I could not see her face. She did not cry out. Polter was half dragging her as she resisted him; and then abruptly she ceased struggling. I heard his gutteral voice. "That iss better." * * * * *