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 God!" 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."
Last night! Surely it was years.
"You had left instructions to have your mail forwarded," the level voice went on. "These letters were evidently one day behind you. I picked them up at your rooms this morning. I took the liberty of opening them. Read this one." He selected it.
WITH trembling fingers I extracted from the envelope a single written page. I recognized the handwriting as the professor's. I read with feverish intensity, each single word burning itself into my consciousness:
- Dear Thornton:
- I am writing this in anticipation. I will see that it is mailed when my plans are completed. Too late, dear friend, for you to attempt, with the best intentions in the world, to frustrate them.
- You will, perhaps, recall that many years ago, when I gave you my full confidence, I told you that I felt sure that the law of compensation would atone in some measure for my loss. Thornton, old friend, I believe that, in more ways than one, my hour has arrived. Two days ago I completed the absolute zero. But even better!
- A man called here to-day. Although he did not recognize me, I saw through the veneer of added years with ease. Fate, call it what you will, my visitor is the man who wrecked my happiness.
- Under pretext I shall detain him. I shall induce him to enter the crystalline cage. I have already arranged a dual control which the power will destroy when I apply it from the inside of the cage.
- Please destroy the cage. It will have brought compensation to me before you read this.
- Good-by, dear friend!
Wroxton.
"I apologize, Mr. Thornton." The chief offered a hand which I clutched in mingled sorrow and relief. The world had lost a genius. I had lost a dear friend. But he was right. It was compensation.
