"I found translations of both the records of the trials and of Sweigert's original reports, and the thing that attracted my attention was that the puncture I found in the victim corresponded exactly with the puncture described by Sweigert as the one he made in extracting the menthium. I asked the immigration authorities to check over their records and they found that a man named Slavatsky whose description corresponded with the ill-fated Sweigert's a.s.sistant had entered the United States under Austria's quota about a year ago. The chain of evidence seemed complete to me, and it only remained to find the man who was systematically robbing brains.

"If such a thing was really going on, I felt that my reputation would make me an attractive bait and I secured a double, as you know, and placed him in a position where his kidnapping would be an easy matter.

I was sure that the victims were being taken away by air and that lethane was being used to reduce the neighborhood to a state of profound somnolence, so I hid myself near my double with a gas detector which would find even minute traces of lethane in the air.

"My fish rose to the lure and came after the bait last night. When his ship arrived, I found a strange gas in the air, and followed the ship by the trail of the substance which it left behind it. Carnes was with me, and we got here in time to witness the extraction of the menthium from my friend, Professor Williams of Yale, and to see it injected into one of Slavatsky's gang. I sent Carnes for help and messed around until I was captured myself--and help arrived just in time. That's about all there is to tell. I am now about to reverse the process and try to remove the stolen brains from the criminals and restore them to their rightful owners. I have never operated and the result may be fatal. Shall I proceed?"

The President and Admiral Clay consulted for a moment in undertones.

"Go on with your experiments, Dr. Bird," said the President, "and we will hold you blameless for a failure. You have worked so many miracles in the past that we have every confidence in you."

Dr. Bird bowed acknowledgment to the compliment and bent over the unconscious dwarf. With Willis directing every move, he inserted the needle and drew back slowly on the plunger. Twenty-three and one-half cubic centimeters of amber fluid flowed into the syringe before a speck of blood appeared.

"Enough!" cried Willis. Dr. Bird withdrew the syringe and motioned to Admiral Clay. The man the Admiral had brought in was placed in the chair and lethane administered. He was laid on the table, and, with a silent prayer, Dr. Bird inserted the needle and pressed the plunger.

When five and one-quarter centimeters had flowed into the man's brains, he withdrew the needle and held the bottle which Carnes had used to revive him under the man's nose. The patient coughed a moment and sat up.

"Where am I?" he demanded. His gaze roved the cave and fell on the President. "h.e.l.lo, Robert," he exclaimed. "What has happened?"

With a cry of joy the President sprang forward and wrung the hand of the man.

"Are you all right, William?" he asked anxiously. "Do you feel perfectly normal?"

"Of course I do. My neck feels a little stiff. What are you talking about? Why shouldn't I feel normal? How did I get here?"

"Take him outside, Admiral, and explain to him," said the President.

Admiral Clay led the puzzled man outside and the President turned to Dr. Bird.

"Doctor," he said, "I need not tell you that I again add my personal grat.i.tude to the grat.i.tude of a nation which would be yours, could the miracles you work be told off. If there is ever any way that can serve you, either personally or officially, do not hesitate to ask. The other victims will be brought here to-day. Will you be able to restore them?"

"I will, Mr. President. From Slavatsky's records I find that I will have enough if I reduce all of his men to a state of imbecility except Willis. In view of his a.s.sistance, I propose to leave him with enough menthium to give him the intelligence of an ordinary schoolboy."

"I quite approve of that," said the President as Willis humbly expressed his grat.i.tude. "Have you had time to make an examination of that ship of Slavatsky's, yet?"

"I have not. As soon as the work of restoration is completed, I will go over it, and when I master the principles I will be glad to take them up with the Army-Navy General Board."

"Thank you, Doctor," said the President. He shook hands heartily and left the cave. Carnes turned and looked at the Doctor.

"Will you answer a question, Doctor?" he asked. "Ever since this case started, I have been wondering at your extraordinary powers. You have ordered the army, the navy, the department of justice and everyone else around as though you were an absolute monarch. I know the President was behind you, but what puzzles me is how he came to be so vitally interested in the case."

Dr. Bird smiled quizzically at the detective.

"Even the secret service doesn't know everything," he said. "Evidently you didn't recognize the man whose memory I restored. Besides being one of the most brilliant corporation executives in the country, he has another unique distinction. He happens to be the only brother of the President of the United States."

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The Invisible Death

A COMPLETE NOVELETTE

_By Victor Rousseau_

[Ill.u.s.tration: Far overhead a luminous shape appeared.]

[Sidenote: With night-rays and darkness-antidote America strikes back at the terrific and destructive Invisible Empire.]

CHAPTER I

_Out of the Hangman's Hands_

"You speak," said Von Kettler, jeering, "as if you really believed that you had the power of life and death over me."

The Superintendent of the penitentiary frowned, yet there was something of perplexity in the look he gave the prisoner. "Von Kettler, I think it is time that you dropped this absurd pose of yours," he said, "in view of the fact that you are scheduled to die by hanging at eight o'clock to-morrow night. Your life and death are in your own hands."

[Ill.u.s.tration]

Von Kettler bowed ironically. Standing in the Superintendent's presence in the uniform of the condemned cell, collarless, bare-headed, he yet seemed to dominate the other by a certain poise, breeding, nonchalance.

"Your life is offered you in consideration of your making a complete written confession of the whole ramifications of the plot against the Federal Government," the Superintendent continued.

"Rather a confession of weakness, my dear Superintendent," jeered the prisoner.

"Oh don't worry about that! The Government has unravelled a good deal of the conspiracy. It knows that you and your international a.s.sociates are planning to strike at civilized government throughout the world, in the effort to restore the days of autocracy. It knows you are planning a world federation of states, based on the principles of absolutism and aristocracy. It is aware of the immense financial resources behind the movement. Also that you have obtained the use of certain scientific discoveries which you believe will aid you in your schemes."

"I was wondering," jeered the prisoner, "how soon you were coming to that."

"They didn't help you in your murderous scheme," the Superintendent thundered. "You were found in the War Office by the night watchman, rifling a safe of valuable doc.u.ments. You shot him with a pistol equipped with a silencer. You shot down two more who, hearing his cries, rushed to his aid. And you attempted to stroll out of the building, apparently under the belief that you possessed mysterious power which would afford you security."

"A little lapse of judgment such as may happen with the best laid plans," smiled Von Kettler. "No, Superintendent, I'll be franker with you than that. My capture was designed. It was decided to give the Government an object lesson in our power. It was resolved that I should permit myself to be captured, in order to demonstrate that you cannot hang me, that I have merely to open the door of my cell, the gates of this penitentiary, and walk out to freedom."

"Have you quite finished?" rasped the Superintendent.

"At your disposal," smiled the other.

"Here's your last chance, Von Kettler. Your persistence in this absurd claim has actually shaken the expressed conviction of some of the medical examiners that you are sane. If you will make that complete written confession that the Government asks of you, I pledge you that you shall be declared insane to-night, and sent to a sanitarium from which you will be permitted to escape as soon as this affair has blown over."

"The United States Government has sunk pretty low, to involve itself in a deal of this character, don't you think, my dear Superintendent?"

jeered Von Kettler.

"The Government is prepared to act as it thinks best in the interests of humanity. It knows that the death of one wretched murderer such as yourself is not worth the lives of thousands of innocent men!"

"And there," smiled Von Kettler, without abating an atom of his nonchalance, "there, my dear Superintendent, you hit the nail on the head. Only, instead of thousands, you might have said millions."