"GOGRUGRON!"

They were visible for a few seconds only—those great eyes burning with a greenish fire.

"Where did they go?" exclaimed Rhodes.

"And," said I, "what can it be? An ape-bat?"

"That is no ape-bat."

He turned to Ondonarkus.

"Loopmuke?" he queried.

No; it was not a loopmuke. But what it was neither Ondonarkus's pantomime nor Drorathusa's could tell us.

"I don't think it's as bad as that. But the Dromans all know what it is themselves."

"There!" I cried, whirling round. "Did you hear that, Milton? There's that other thing again—that thing behind us!"