"It"s the professor"s," I choked, crowding close to him.
"How"d you know?" he shot back. "All unset stones look pretty much alike."
"I just know," was all I could falter.
"You "just know"." The chief sat down on a stool and regarded me searchingly. "Mr. Thornton, when I started out with you, I thought I was on a wild goose chase or the trail of a confession. You looked exactly like a man who had either committed a serious crime, or was getting over a bad drunk. I feel sure now"-he again regarded the diamond-"that your story was not the product of an alcohol-crazed brain. Come on!" He lurched to his feet, and grasped me by the shoulder. "Come through!"
Without answering, I wrenched myself free. Over my shoulder I saw one of the policemen at the door. In the hand of the other a revolver suddenly appeared. Good G.o.d! I glared in bewilderment from one to another. Was I going mad? Surely this was some awful nightmare! What had I said to make them suspect me of having committed a revolting crime?
"Sit down!" The command came from the chief. Mechanically I found a stool, and obeyed him. "Hold your stations, boys, and listen carefully," he ordered his men. Then he turned to me.
"Professor Wroxton was a wealthy man without kith or kin?"
"Yes."
"Do you know the nature of his will?"
"Yes." Chilled to the heart, I felt the circ.u.mstantial net tightening.
"What is its nature?"
"This house and an annuity to John and his wife," I explained. "The residue of his wealth to me."
"Humph!" The chief stared at me piercingly. "And how has business been with you lately?"
d.a.m.n the man! What right had he to put me through the third degree? I felt my state of dazed horror slowly giving way to anger. I glanced around. The pistol still menaced; the man at the door had not moved. It was useless to try and evade the questions.
"For the past year," I replied, "business has been very poor. In fact, the professor advanced me some money."
"Humph!" Again that irritating, non-committal grunt.
The chief turned in his seat and stared thoughtfully at the crystalline cage.
"And you don"t know what the professor was trying to invent?"
"Only its nature," I began.
"Ah! That"s better. Why didn"t you tell me that before?" The chief leaned forward.
"Well," I explained, "the whole thing seems so absurd. When the professor told me how his married life had been broken up, he told me that at that time he reached the utmost depths of human suffering. Absolute zero, he called it."
"Ah!"
"The experiments he indulged in," I continued, trying to hide the shiver pimpling my flesh, "were to produce an actual state of absolute zero. It is years since he told me this. I had almost forgotten it."
"And exactly what is an absolute zero?" The chief"s eyes never left mine.
"Well," I protested, "please understand that I also am a layman in these matters. According to my friend, an absolute zero has been the dream of scientists for ages. Once upon a time it was attained, but the secret became lost."
"And exactly what is an absolute zero?"
Curse the man! I could have struck him down for the chilling level of his tone. I forced myself to go on, realizing that I was d.a.m.ning myself at every step.
"An absolute zero is a cold so intense it will destroy flesh, bone and tissue. Remove them," my voice rose in spite of myself, "leaving absolutely no trace."
No trace! Something attracted my eyes. The chief had opened his hand. The diamond there flashed and sparkled as if mocking me. I pulled myself together, and went on.
"It all comes back to me now. One day I came out here and found the professor terribly distraught. He told me that, with the aid of electric currents he had been able to invent the absolute zero, but he could not invent a container."
"Why?" Those eyes continued to bore into mine.
"Because-remember it is years since he told me this-there was difficulty in controlling the power. Besides destroying living things, it would destroy bricks and mortar, stone and iron. Only one substance it could not wipe out-crystalline of diamond hardness.
"I know, now!" I jumped to my feet and grabbed the chief"s arm. "I know now what he meant. Fool, fool! Why did I not think of it before? This-" I swung towards the cage-"is compensation." Almost panting in my eagerness I went on:
"My friend told me that the law of compensation would atone to him for the tragedy of his youth. Absolute zero in suffering would be atoned for by a real state of absolute zero. Chief!" I whirled on him. "Don"t you understand? This is the perfected dream of my friend. It is the absolute zero."
"Humph! Plausible but not convincing." I slumped back at the officer"s words. "That does not explain the professor"s disappearance. Even if it did, what about Mr. Lathom? And don"t forget this contrivance is worked from outside. We found the diamond inside. Of course, he might have placed it there himself to test the machine," he concluded.
"Of course, that"s it," I commenced. But I regretted the words when I saw suspicion flicker again in the chief"s eyes. Lamely I finished, "And he has probably rushed off, in an ecstasy of triumph, to acquaint professional colleagues."
"Without unlocking any doors or taking a car, eh?
"Mr. Thornton." The chief stood up and regarded me sternly. "As a sensible man, don"t you think yourself that your story is a bit thin? The professor has disappeared. Here is a strange-looking case which you say is an absolute zero container. Whether you know, or are just jumping at conclusions, remains to be proved. But even if it is, do you think that, after perfecting such a tremendous invention, the professor would commit suicide?"
"On the contrary," I gasped, "my friend was a man of gentle, kindly disposition, but strong purpose. I should think his first action on attaining his life"s ambition would be to notify me, his closest friend."
"And he didn"t." Every word condemned me, and roused me to retaliate.
"Chief, I know enough of the law to know that, before you can try a man for murder, you must prove that murder has been committed." I grinned savagely. "You must have the corpus delicti. Go ahead! Find my friend or his remains, or else withdraw your charges." I grinned again, with shocked mirthlessness.
Then I buried my head in my hands. I had called in the police to help find the professor, and they had only blundered around and asked a lot of stupid questions. The chief had practically accused me of murder-something I knew he could not prove, yet feared he might. Because I had told the chief of the locked doors and unused cars, he had confined his investigations to the house itself.
He interrupted my thoughts.
"Mr. Thornton, I am going back to town. You will remain here with my men. I advise you to get some sleep, as I shall not be able to carry out certain investigations until the morning. One of my men will spend his time searching the house and patrolling the grounds, the other one will stay here with you."
He turned away, whispered some instructions to his men, and, followed by one of them, silently left the laboratory. I started to protest, tried to follow him; the man at the door stopped me. Silently, almost grimly, he indicated a narrow cot at one end of the room. For a moment I hesitated, feeling the man"s eyes upon me.
Sleep on my dead-I felt sure he was dead-friend"s cot! Sleep in that fearful place! My whole being crawled with horror. I turned again to the man. His features were unyielding. Perhaps this was more third degree. Limp with weakness and weariness, I dragged my lagging feet towards the cot.
As long as I live I shall never forget my awakening. A uniformed figure, the chief, shaking me by the shoulder. Two other uniformed men silently watching. I sat up and gazed about me, dazedly. Bright sunlight streamed through the windows. A stray gleam struck the cage. I shrank back, trembling. And yet I had slept soundly.
"Mr. Thornton," the chief said, "I have serious news for you. I have positive proof your friend is dead."
"Dear G.o.d!" The exclamation was wrung from me as recollection returned with a rush. "Where? You can"t have!"
"Here." He thrust a bundle of letters into my hands. "You acted so strangely last night you caused me to suspect you of a serious crime. Also, you overlooked several important points. You got back from a trip only last night."