I shuddered, in the metal arms that held me. That black mirror-film was as mysteriously deadly as it had seemed. Which one of us might drop through it next?

All my four companions were helpless as myself. The lean face of Kel Aran was very white. A scarlet stain crept from the corner of his mouth, and I saw that his lip was bitten through.

"Farewell, Vere!" I heard his hopeless whisper. "We've fought in vain. Barihorn, farewell!"

Strange words, from the Falcon of Earth. But his voice choked. His gasping breath stopped. His unkempt yellow head dropped limply forward, and his lean body collapsed in the silver tentacles.

"Kel, Kel!" Agonized, the girl fought the silver ropes that bound her. They sank resistlessly into her white flesh. And the silver being spoke, in a clear, melodious voice.

"Be still. You can accomplish nothing."

That grave calm speech, from the oddly bird-like robot, was somehow a thing eerie beyond expression. And it carried a certainty of victory—of man's extinction—that chilled my heart.

The white tentacles about the Earthman must have relaxed a little. Abruptly, now, he was transformed from apparent death to lightning action. He twisted and surged against the robot that held him, snatching for its unused cathode gun.

His ruse came very near success. His hands found the clumsy weapon, and dragged it from its sling. But the metal coils constricted on his body. His breath came out, in an involuntary scream. His body made snapping noises, beneath that pitiless pressure. His face turned purple. Blood rushed from his lungs. He slumped again, unconscious in reality.

The cathode gun fell out of his hands—