At the sound of the reports, the other enemy arose from the prostrate form of Blair Windsor. The man leaped forward, and as he did so, Harry fired three more shots. They were aimed at the man’s body; but they did not stop his spring.

Harry fell beneath the man’s bulk.

Then came a great surprise. Instead of being inert, the man was grappling, thoroughly alive. Harry was totally amazed. His bullets had failed to take effect.

It was too late now to fire again, for he had lost his hold on his gun when he had attempted to push away the body of the man whom he had presumably wounded.

For an instant, Harry gained the advantage. His eyes were toward the wall, and he saw the first man rising.

He, too, was uninjured! He piled in to help Harry’s antagonist, and the struggle became hopelessly unequal.

Harry called to Blair Windsor. But no aid came. He caught a glimpse of Blair, half raised from the floor, resting on one elbow, watching the conflict.

One man had pinned Harry’s arms behind him. A big fist loomed, and Harry received a vicious punch squarely on the jaw. The room whirled, and went black.

Harry Vincent lay helpless and unconscious.

CHAPTER XXVIII