the flask of menthium.
"Carson," he said, "after you had watched Slavatsky inject menthium into Willis, you took lethane and expected him to inject menthium into your brain. Instead of doing so he withdrew a portion from your brain and put it in this flask. I have reason to believe from his secret records which I found in the cabinet with this flask that he has done so regularly. Are you willing to instruct me while I remove the menthium from him?"
"The dirty swine!" shouted Carson. "I'll do anything to get even with him, but I have never performed the operation. Only Slavatsky and Willis have operated."
"Will you help me, Willis? asked Dr. Bird.
"I'll be glad to, Doctor. I am sick of this business anyway. At first, Slavatsky just planned to give us abnormally keen brains, but lately he has been talking of setting himself up as Emperor of the World, and I am sick of it. I think I would have broken with him and told all I know, soon, anyway."
"Throw him in that chair," said Dr. Bird.
Despite the howlings and strugglings of the dwarf, three of the marines strapped him in the chair beneath the tube. The dwarf howled and frothed at the mouth and directed a final appeal for mercy to the President.
"Spare me, Your Excellency," he howled. "I will put my brains at your service and make you the greatest mentality of all time. Together we can conquer and rule the world. I will show you how to build hundreds of ships like mine – "
The President turned his back on the dwarf and spoke curtly.
"Proceed with your experiments, Dr. Bird," he said.
Slavatsky directed his appeals to the doctor, who peremptorily silenced him.
"I told you a few hours ago, Slavatsky, that the time might come when I would remember your threats against me. I will show you the same mercy now as you promised me then. Carnes, put a cone over his face."
Despite the howls of the dwarf, the operative forced an anesthesia cone over his face and Dr. Bird turned to the valve of the lethane cylinder. With Willis directing his movements, he turned on the ray for three minutes and removed the unconscious dwarf to the operating table. He took the long-needled syringe from a case and sterilized it and then turned to the President.
"I am about to operate," he said, "but before I do so, I wish to explain to all just what I have learned and what I am about to do. With that data, the decision of whether I shall proceed will rest with you and Admiral Clay. Have I your permission to do so?"
The President nodded.
"When I first read of these amnesia cases, I took them for coincidences – until you consulted me and gave me an opportunity to examine one of the victims. I found a small puncture at the base of the brain which I could not explain, and I began to dig into old records. I knew, of course, of Sweigert of Vienna, and the extravagant claims he had put forward in 1911. He was far ahead of his time, but he mixed up some profound scientific discoveries with mysticism and occultism until he was discredited. Nevertheless, he continued his experiments with the aid of his principal assistant, a man named Slavatsky.
"Sweigert's theory was that intellectuality, brain power, intelligence, call it what you will, was the result of the presence of a fluid which he called 'menthium' in the brain. He thought that it could be transferred from one person to another, and with the aid of Slavatsky, he experimented on himself. He removed the menthium from an unfortunate victim, who was reduced to a state of imbecility, and Slavatsky injected the substance into Sweigert's brain. The experiment resulted fatally and Slavatsky was tried for murder. He was acquitted of intentional murder but was imprisoned for a time for manslaughter. He was released when the Austro-Hungarian Empire was broken up, and for a time I lost track of him.
"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 assistant 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. "Hello, 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 gratitude to the gratitude 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 assistance, 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 gratitude. "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