They very nearly missed going low enough. It seemed to Ted that they must have scraped the big boat’s keel, but Mary got in her good work.

And it was very good, for scarcely had they passed on to safety when there was a great flash and an explosion as the giant blew up.

“Good work! Great stuff!” sounded in Ted’s ears. Jack was speaking.

“Better keep radio silence,” was Ted’s answer.

All the while Ted and Mary were engaged in the fight, Jack and Stew had been standing by to come in if they were needed.

Stew had been all for stepping in at the very start, but Jack had ruled against it. “We don’t know our ship, our guns, or our instruments well enough to risk it,” was his verdict. “Besides, our capture of this secret plane may be of more importance than we think.”

“Not much help at the bottom of the sea,” Stew agreed.

The fight over, they got back into line, then zoomed on through the night.

Ted was astonished when at last, flying high, they sighted the white specks on the sea that would be their task force. And a greatly reinforced one it was.

“Three times as many fighting ships as we had before,” he said to Mary. “Three carriers and scores of cruisers and destroyers. This is it! We’re off to the big show!”