And now, just as they reached the laboratory door, panting and frantic, a hoarse shriek broke forth. Dragging Aña after him, Hale dashed forward, conscious of two masculine voices raised in passion.

The door to the room where the life-machine performed its vile work was locked. Hale pounded against it and called out to Sir Basil, but only curses and the sound of tumbling bodies came from beyond the door. Although originally the door had been thick and strong, the destructive forces of the tropics had pitted and rotted the wood. A few blows of Hale’s shoulder broke it down.

Under the brilliant electric light, Sir Basil and Unani Assu were fighting upon the blood-spattered floor. The struggle was uneven: the scientist’s emaciated body was no match for the splendid strength of the young Indian.

“Help Aimu!” cried Aña, pushing Hale forward.

Aimu was being choked to death.

Hale acted fantastically but efficiently. Catching up a bottle of ammonia, he moistened a handkerchief and clapped it against Unani Assu’s nose. Instantly the Indian choked, released Sir Basil, and fell back, gasping for breath.

Hale thrust the handkerchief into his pocket.

“Get out!” he ordered Unani Assu. “Quick!” He threatened him with the ammonia bottle.

But Unani Assu was not looking at the bottle. “Aimu!” he screamed, pointing.