His face was rugged in feature; a wide mouth, a high-bridged heavy nose; and above the face a great shock of wavy black hair. It was an intelligent face; in itself, not repulsive.

But I think we all three feared Franz Polter. There was always something sinister about him, that had nothing to do with his deformity.

When I came, that afternoon, Babs and Polter were under a tree on the Kent lawn. Babs, at fourteen, with long black braids down her back, bare-legged and short-skirted in a summer sport costume, was standing against the tree with Polter facing her. They were about the same height. To my youthful imaginative mind rose the fleeting picture of a young girl in a forest menaced by a gorilla.

I came upon them suddenly. I heard Polter say:

"But I lof you. And you are almos' a woman. Some day you lof me."

He put out his thick hand and gripped her shoulder. She tried to twist away. She was frightened, but she laughed.

"You--you're crazy!"

He was suddenly holding her in his arms, and she was fighting him. I dashed forward. Babs was always a spunky sort of girl. In spite of her fear now, she kept on struggling, and she shouted:

"You--let me go, you--you hunchback!"

He did let her go; but in a frenzy of rage he hauled back his hand and struck her in the face. I was upon him the next second. I had him down on the lawn, punching him; but though at seventeen I was a reasonably husky lad, the hunchback with his thick, hairy gorilla arms proved much stronger. He heaved me off. The commotion had brought Alan and without waiting to find out what the trouble was, he jumped on Polter. Between us, I think we would have beaten him pretty badly. But the housekeeper summoned Dr. Kent and the fight was over.

Polter left for good within an hour. He did not speak to any of us. But I saw him as he put his luggage into the taxi which Dr. Kent had summoned. I was standing silently nearby with Babs and Alan. The look he flung us as he drove away carried an unmistakable menace--the promise of vengeance. And I think now that in his warped and twisted mind he was telling himself that he would some day make Babs regret that she had repulsed his love.

What happened that night none of us ever knew. Dr. Kent worked late in his laboratory; he was there when Alan and Babs and the housekeeper went to bed. He had written a note to Alan; it was found on his desk in a corner of the laboratory next morning, addressed in care of the family lawyer to be given Alan in the event of his death. It said very little. Described a tiny fragment of gold quartz rock the size of a walnut which would be found under the giant microscope in the laboratory; and told Alan to give it to the American Scientific Society to be guarded and watched very carefully.

This note was found, but Dr. Kent had vanished! There had been a midnight marauder. The laboratory was on the lower floor of the house. Through one of its open windows, so the police said, an intruder had entered. There was evidence of a struggle, but it must have been short, because neither Babs, Alan, the housekeeper, nor any of the neighbors had heard anything.