“That list, Tyler,” said Bentley, after he had somewhat calmed the fears of Ellen Estabrook and had returned to the task of tracing Barter, “is headed by Harold Hervey, the multi-millionaire. I know Barter well enough to know that he’ll go down the list methodically, taking each person in turn. We’d best take immediate precautions to guard the old man’s home. For Barter, if not entirely ready to take drastic steps, must be almost ready, else he couldn’t issue his manifestoes and take a chance of some slip-up before he could get really started.”

“Why do you suppose he named Hervey on the list?” asked Tyler.

“Because Hervey is a financial genius. Barter wishes not only to carry out his plan of creating a race of supermen, but wishes at the same time to maintain personal control of them. And to control Manhattan, from which he logically hopes to extend his control to the whole United States, then to the whole world, Barter must also control the money marts. Hervey is the shrewdest financier in the world.”

“But won’t we frighten Hervey’s family if we take steps now?”

“Better to frighten them now than to be too late entirely. However, we can place his house under surveillance without the knowledge of the family for the time being. And you’d better send a couple of men to his office in the Empire State Building to see that nothing happens to him on the way home this evening. I talked to him by telephone and he pooh-poohed the whole thing. Hard-headed business executives have no imagination.”

Bentley and Tyler rode uptown in the back seat of a speeding police car driven by one of the best chauffeurs Bentley had ever ridden behind. He edged through holes in the traffic where Bentley could scarcely see any holes at all. He estimated the speed of cars which might have collided with the police vehicle and slipped through with inches to spare. In his way the man was a genius. But Bentley was yet to see the driving of a master genius....

Far out in the residential district the police car came to a stop. Other police cars arrived at intervals to disgorge men in plain clothes who immediately entered upon their guard duties as unobtrusively as possible. If Hervey’s family noticed at all they would scarcely attach any importance to the arrival of cars and the discharging of passengers who seemed to have nothing to do except dawdle on the sidewalks.

But all the way uptown a hunch had ridden Bentley. He had the feeling that no matter how fast the police car traveled, no matter how skilfully the chauffeur inched his way through the press, they would be too late to save Hervey. The feeling became an obsession. Many times he called through the speaking tube.

“Faster, driver, for God’s sake, faster!”

Now near the home of Harold Hervey, Bentley found himself unable to walk slowly, with the air of nonchalance, which the other police officers wore like a cloak.

“Something’s happened,” said Bentley, “I’m sure of it. I feel that 41 Barter is so close to me that I could touch him if I knew in which direction to extend my fingers.”

Suddenly a speeding car, with horn bellowing, came crashing up the street toward the Hervey residence. It was traveling at great speed, careening from side to side like a ship in a storm at sea.

“There comes Hervey’s car,” said Tyler. “And something has happened to make him travel like that. Old man Hervey doesn’t allow his chauffeur to go faster than twenty miles an hour.”

Tyler and Bentley were near by when the car squealed to a stop before the Hervey residence and a hatless, disheveled man leaped out almost before the car stopped rolling.

“That’s not Hervey,” said Tyler. “That’s his private secretary. Something’s up. It’s time we took a hand in things.”

Tyler and Bentley grasped the young man by the elbow.

“What’s up?” demanded Tyler.

“It’s Mr. Hervey, sir,” panted the secretary. “It just happened. He’s been kidnaped!”

The secretary was a slight man, but fear had given him strength. He almost dragged Tyler and Bentley off their feet as he strode on up the walk leading to the home of Hervey.

“You’ll scare his family half to death!” said Tyler.

“It’ll have to come sometime, Tyler,” said Bentley. “It might as well be now. They’ll have to know. We’ll have to sit inactively from this moment on. Tyler, there’s nothing that can be done for Hervey. Barter has scored. We couldn’t catch him now to save ourselves from perdition. But his next step will involve the Hervey menage. We’ll have to wait there for his next move.”

Tyler and Bentley entered the vast gloomy structure of the old-fashioned Hervey domicile on the heels of the frightened secretary. Mrs. Hervey, a faded woman of sixty or so, met them at the door. Her head was held high, her lips grimly drawn into a straight line.

“So,” she said evenly, “they’ve got Mr. Hervey. I begged him to take those threats seriously. He’s been either killed or kidnaped.”

“Kidnaped,” said Bentley, continuing brutally because of the courage he saw in the old woman’s face. “And that means he’ll be dead within the hour, if he isn’t dead already. We’ve got to stay here for a few hours, to await the next move of the madman calling himself the Mind Master, in the hope that we can trace him when he makes his next move.”

Mrs. Hervey lifted her head still higher.

“We’ll place no obstacles in your path, gentlemen,” she said, “if you are from the police. The family will confine itself to the upper floors of the house.”

Tyler and Bentley took possession of the living room. Outside a dozen plain-clothes men were to patrol the grounds during the hours of darkness.

Other men were at every adjacent street corner. A rat could not have got through unobserved.

Tyler and Bentley took seats at a table facing the door. The police car in which they had arrived stood at the curb, with the chauffeur at the wheel, the motor humming softly.

“Timkins,” said Bentley, addressing the private secretary who stood in the most distant corner of the room, his eyes fearfully fixed on the street door, “how was Mr. Hervey captured?”

“I was accompanying him to his car, sir,” replied the young man, “when a dapper fellow in a chauffeur’s 42 uniform confronted us on the sidewalk. He stood as stiff and straight as a soldier. He didn’t say a word. He just looked at Mr. Hervey. Mr. Hervey stopped because the man was blocking the sidewalk. I looked into the chauffeur’s eyes. They seemed utterly dead. I shivered. I’d have sworn the man had no soul, now that I look back at it. Suddenly he lashed out with his fist, striking Mr. Hervey on the jaw. Mr. Hervey started to fall. The man caught him under the arms and tossed him into the tonneau of a limousine at the curb. The car was away before I could summon the police.”

Bentley nodded.

“Which way did the car go?” he demanded.

“Downtown, at top speed,” replied Timkins.

Bentley turned to Tyler.

“The Stuyvesant exchange is downtown,” he said. “Now Timkins says that the kidnaper’s car went downtown. And the naked man was killed in the Flatiron Building, which is well downtown in its turn. Tyler, fill all the area covered by the Stuyvesant exchange with plain-clothes men. Telephone Headquarters to see whether a stolen limousine has been reported from somewhere in the area. Barter wouldn’t have cars of his own for fear they could be traced. He’ll use stolen cars when he uses cars at all. And he had his puppet pick up the limousine close to his hideout.”

Tyler nodded and quickly spoke into the telephone on the table at his elbow.

The telephone reminded Bentley of Ellen Estabrook.

When Tyler had finished issuing pointed instructions Bentley called the residence of the Estabrooks in Astoria, Long Island.

Carl Estabrook answered the telephone.

“Is Ellen all right?” asked Bentley. “May I speak to her?”

Carl Estabrook’s answering gasp came plainly over the wire.

“Are you crazy, Lee?” he asked. “Not ten minutes ago you telephoned Ellen and told her to meet you near the arch in Washington Square. I asked her if she was sure the voice was yours, and she was....”

But Bentley, white-faced, had already clicked up the receiver.

“Tyler,” he said, “Ellen Estabrook, my fiancÉe, is walking into a trap. It’s Barter again. He’d know how to imitate my voice well enough to fool Ellen. It would be simple enough for a man like him. He probably had that long conversation with me at headquarters to make sure he hadn’t forgotten the timbre and pitch of my voice ... and to hear how it sounded over the telephone. Please have plain-clothes men pick up Ellen in Washington Square. And that, Tyler, if you’ll notice, is also downtown.”

Bentley felt that he would go mad with anxiety as he awaited some news from the plain-clothes men Tyler had ordered to look for Ellen Estabrook.

He had asked Tyler to issue rather unusual instructions to the plain-clothes men around the Hervey residence. They were to make no attempt to halt anyone who might approach the house, but were to permit no one to depart. It was a weak plan, but knowing the supreme egotism of Barter, Bentley felt that the old scientist would deliberately accept such a challenge. He wouldn’t mind risking the loss of a minion.

“He controls his puppets from his hideout, Tyler,” Bentley explained, “and won’t hesitate to send them into danger since it can’t touch him. And he watches every 43 move they make, too. He’s made some television adaptation of his own. I’ll wager, if he so desires, he can see us sitting here right now, even perhaps hear what we say. I can fancy hearing him chuckle, and Tyler...?”

“Yes?”

“I can see old man Hervey on an operating table with Barter bending over him, working fiendishly. Behind Barter are cages of apes.”

“But how could he transport apes to his hideout?”

“He could manage to smuggle anything anywhere. Money paves the way to any accomplishment, Tyler. We needn’t concern ourselves with how he does it, but with the fact that he must surely have apes in his hideout.”

There came suddenly an imperious ringing of the doorbell.

Bentley and Tyler leaped to their feet, their hands streaking for their automatics which they had placed within easy reach on the table. Side by side they sprang for the door, and flung it open.

A chill of horror ran through Bentley.

“Mother of God!” cried Tyler.

“Mr. Hervey!” shrieked Timkins. The secretary, noting the figure which toppled so grimly into the room, fainted. The thud of his body followed the thud of the old man’s body to the floor.

In that first moment of overwhelming terror, all three men noted that Hervey’s skull-pan was missing.

“Look after details here, Tyler!” cried Bentley, quickly recovering himself. “I’m after whoever brought the old man home.”

Bentley was racing down the path for the street, where a man in chauffeur’s uniform was hurling himself into a limousine, while bullets from half a dozen plain-clothes men, racing to head him off, sang about his ears. But the stranger gained the driver’s seat and the limousine was away like a shot. The police car was rolling as Bentley leaped upon the running board, then eased in beside the driver.

“Don’t stop for anything!” cried Bentley. “Keep that car in sight!”

The car headed downtown at breakneck speed.