ward, then I again stared about me. At one end of the large room something shone brightly in the glow of the lights. Slowly I walked across to examine it: it appeared to be a glass case, almost like a show-case, about eight feet square and seven feet in height. With the mechanical actions of the mentally distraught I walked all around it. Not the slightest sign of an entrance could I see. The fact intrigued me. I tapped lightly on the highly polished surface with my fingers. It rang to my touch like cut glass.
Through the transparent surface I could see John and his wife. They were watching me furtively, wondering, no doubt, why I lingered. As I looked at them John suddenly lumbered up to the case on the opposite side. Dropping to his knees, he stared. Turning an imploring gaze to me, he pointed. His lips moved soundlessly. I followed the pointing finger with my eyes; gasped at what I saw.
Near the center of the cage, on the floor constructed of the same crystalline substance, something glittered, its brilliance almost dazzling as the light rays struck it. My face pressed close to the cold outer surface of the structure, my shocked intelligence gradually realized what that small sparkling object was. It was a magnificent diamond—and the professor had always worn a diamond ring!
IN a sudden frenzy of horror I pawed my way around the cage to where John still knelt. As I reached him he jerked his head in a numb way as he croaked, "It's a diamond, sir! The professor's!"
"But how?" I implored. "How can it be? There's no way into this thing. Perhaps he was working here, and the stone came loose from its setting. He couldn't have dropped it after the cage was completed."
"It's his diamond, sir," intoned the old man, dully. "I know it is."
Then a sudden unreasoning terror filled me. I shrank away from that shining box. It seemed to be mocking me, gloatingly, malevolently.
"Quickly!" I threw at the aged couple. "Let us get out of here! Now! At once!" They needed no second urging. I knew that they felt as I felt: the laboratory was a sepulcher!
Five minutes later I was guiding my car over the narrow road to town. I did not pause until I drew up at police headquarters. I suppose my appearance was distraught, for I was ushered into the presence of the chief without delay. In a few moments I had poured out my story. He listened with a polite calmness I found almost maddening. Leaning back in his chair, he reviewed, audibly, the facts.
"Some twenty-odd years ago your friend, Professor Wroxton, married. He was so absorbed in the pursuit of some weird invention that he neglected his bride. She ran away with another man. This man deserted her, and disappeared. The professor found her many months later, in desperate health. Shortly afterwards she died. Your friend tried to trail the man, but failed. Shocked and saddened beyond measure, he retired to a place known as The Grange."
HE suddenly straightened up in his seat, and pointed at me a thick forefinger.
"How long have you known Professor Wroxton?"
"About ten years," I answered.
"What was he trying to invent?"
"I don't know," I replied.
"And yet you had his confidence in other matters?"
"But what has all this to do with finding out what has become of my friend?" I blurted out. "Perhaps every moment counts."
"A lot." The chief eyed me in a way I did not like. "Solely because your friend has not been seen by his servants for nearly twenty-four hours, merely because you saw what you believe to be his diamond in some kind
