At the same time, Thomas, the faithless valet of Bennett, had been dispatched by the Clutching Hand to commandeer his master's roadster in his absence, and, carrying out the instructions, he had driven up before Elaine's house at the very moment when she was going out for a walk.

Thomas jumped out of the car and touched his hat deferentially.

"A message from Mr. Bennett, ma'am," he explained. "Mr. Kennedy and Mr.

Bennett have sent me to ask you to come over to the laboratory."

Unsuspecting, Elaine stepped into the car and drove off.

Instead, however, of turning and pulling up on the laboratory side of the street, Thomas stopped opposite it. He got out and Elaine, thinking that perhaps it was to save time that he had not turned the car around, followed.

But when the valet, instead of crossing the street, went up to a door of a house and rang the bell, she began to suspect that all was not as it should be.

"What are you going here for, Thomas?" she asked. "There's the laboratory--over there."

"But, Miss Dodge," he apologized, "Mr. Kennedy and Mr. Bennett are here. They told me they'd be here."

The door was opened quickly by a lookout of the Clutching Hand and the valet asked if Craig and Elaine's lawyer were in. Of course the lookout replied that they were and, before Elaine knew it, she was jostled into the dark hallway and the door was banged shut.

Resistance was useless now and she was hurried along until another door was opened.

There she saw LeCroix and the other crooks.

And, as the door slammed, she caught sight of the fearsome Clutching Hand himself.

She drew back, but was too frightened even to scream.

With a harsh, cruel laugh, the super-criminal beckoned to her to follow him and look down through a small trap door.

Unable now to resist, she looked.

There she saw us. To that extent the valet had told the truth. Kennedy was standing in deep thought, while I sat on an old box, smoking a cigarette--very miserable.

Was this to be the sole outcome of Kennedy's clever ruse, I was wondering. Were we only to be shipwrecked in sight of port?

Watching his chance, when the street was deserted, the Clutching Hand and his followers had hustled us over to the new hangout across from the laboratory. There they had met more crooks and had thrust us into this vile hole. As the various ineffectual schemes for escape surged through my head, I happened to look up and caught a glance of horror on Craig's face. I followed his eyes. There, above us, was Elaine!

I saw her look from us to the Clutching Hand in terror. But none of us uttered a word.

"I will now show you, my dear young lady," almost hissed the Clutching Hand at length, "as pretty a game of hide and seek as you have ever seen."

As he said it, another trap door near the infra-red ray machine was opened and a beam of light burst through. I knew it was not that which we had to fear, but the invisible rays that accompanied it, the rays that had affected the bolometer.

Just then a spot of light showed near my foot, moving about the cement floor until it fell on my shoe. Instantly, the leather charred, even before I could move.

Kennedy and I leaped to our feet and drew back. The beam followed us.

We retreated further. Still it followed, inexorably.

Clutching Hand was now holding Elaine near the door where she could not help seeing, laughing diabolically while he directed LeCroix and the rest to work the infra-red ray apparatus through the trap.

As we dodged from corner to corner, endeavoring to keep the red ray from touching us, the crooks seemed in no hurry, but rather to enjoy prolonging the torture as does a cat with a mouse.

"Please--oh, please--stop!" begged Elaine.

Clutching Hand only laughed with fiendish delight and urged his men on.

The thing was getting closer and closer.

Suddenly we heard a strange voice ring out above us.

"Police!"

"Where?" growled the Clutching Hand in fury.

"Outside--a raid! Run! He's told them!"

Already we could hear the hammers and axes of the police whom Kennedy had called upon before, as they battered at the outside door.

At that door a moment before, the lookout suddenly had given a startled stare and a suppressed cry. Glancing down the street he had seen a police patrol in which were a score or more of the strongarm squad.

They had jumped out, some carrying sledgehammers, others axes.

Almost before he could cry out and retreat to give a warning, they had reached the door and the first resounding blows had been struck.

The lookout quickly had fled and drawn the bolts of a strong inner door, and the police began battering that impediment.

Instantly, Clutching Hand turned to LeCroix at the F-ray machine.

"Finish them!" he shouted.

We were now backed up against a small ell in the wall of the cellar. It was barely large enough to hold us, but by crowding we were able to keep out of the reach of the ray. The ray shot past the ell and struck a wall a couple of inches from us.

I looked. The cement began to crumble under the intense heat.

Meanwhile, the police were having great difficulty with the steelbolt-studded door into the room. Still, it was yielding a bit.

"Hurry!" shouted Clutching Hand to LeCroix.

Kennedy had voluntarily placed himself in front of me in the ell.

Carefully, to avoid the ray, he took the asbestos-platinum shield from his pocket and slid it forward as best he could over the wall to the spot where the ray struck.

It deflected the ray.

But so powerful was it that even that part of the ray which was deflected could be seen to strike the ceiling in the corner which was of wood. Instantly, before Kennedy could even move the shield, the wood burst into flames.

Above us now smoke was pouring into the room where the deflected ray struck the floor and flames broke out.