Creatures of Vibration

"[...] He was-a little. His head was splitting and the taste of blood was in his mouth, but it was nothing serious. He'd been half knocked out, but his head was clearing already. Of far greater importance was the fact that Ora was unharmed; he satisfied himself of that immediately.
"I'm all right," he grunted, struggling to his feet and feeling around in the blackness.
The lights in the passage were out and he groped blindly along the partition, the metal of which had suddenly become very h...