"You're going right through that cavern, then, Wells?" he asked incredulously. "You're going to investigate what lies beyond?"

"Nothing else! And I won't come out till I've blown that octopi ship to pieces!"

"It sounds preposterous," Knapp murmured, shaking his head. "Octopi, you say—and clad in metal suits! Running a submarine more powerful than the NX-1! Armed with a ray—a paralyzing ray! I can't believe—I can't conceive—"

"You've seen the men!... Knapp, if I were you I'd swing my eight-inchers out, bring up the plane catapult and keep the deck torpedo tubes loaded and ready. It's best to be prepared; God knows what's going on underseas these days!"

First Officer Graham appeared at the door. "Work finished, sir," he said. "Ready to cast off."

"Thank heaven!" Wells muttered, and stretched out his hand to Robert Knapp. "Broadcast what I've told you, Bob, and say that the NX-1 won't be back till everything's under control. I'll keep in touch with you. So long!" And he was gone before the captain could even wish him good luck.


rders raced from her commander's fingers on the stud board in the control room. "Crash Dive" filled her tanks and put her nose perilously down, so that in thirty seconds only a swirling patch of water was left to show where once she'd lain. A brief command to the helmsman and she pointed straight for the dark cavern marked on the chart.

When well under way, Keith descended with Graham to inspect the new torpedo firing system, and found it in good working order. "Graham," he ordered tersely, "instruct the crew fully about rushing to the control room on one ring of the general alarm. And send the cook up to me in a minute or so. I'll be in Sparks' cubby."