The White Shark, which had been forging ahead on an even keel almost on the bed of the ocean, continued to proceed in that manner for a short time. Then, as the twin propellers affixed to her sides “bit” into the water, she slowly raised her bow toward the surface.

“Clang! clang!”

The gong resounded again. But this time it was not an order recorded on the face of the signaling dial that it indicated, but a summons to the speaking tube.

Jack sprang toward the bell-shaped mouth of the tube.

“Hullo!” he cried.

“Hullo! Engine room?” came back the query.

“It’s Mr. Dancer,” breathed Jack over his shoulder; and then—“Yes, sir!”

“Congratulations. The White Shark is a success.”

“I knew it, sir; I felt it, that is. We’ve done a wonderful thing.”

“You may well say that, Jack,” came another voice, that of his father; “I’m proud of you, lad. It was your skill that did it.”