Then Jack signalled: "Full speed ahead."

A moment later the vessel leaped forward. There came a cry of consternation from the Germans, who tumbled back down the steps. As they did so, Frank again sprang to the wheel and brought the head of the Bismarck sharply about—for since he had released his hold on the wheel the vessel had been drifting.

Quickly the lad lashed the wheel with several lengths of cable and then sprang back to the bridge amid a volley of revolver bullets from the Germans who still held the deck. None hit him.

Below, in the engine room, Harris was facing heavy odds. Before answering Jack's signal, after regaining consciousness, he had closed and barred the engine-room door and now he paid no attention to the hammering upon it. He smiled grimly to himself.

"You won't get in here as long as that door holds," he said. "Before that I should have assistance."

The pounding upon the door continued.

"We'll have to lend Harris a hand, sir," said Jack. "They are too many for him down there."

"The first man that steps clear of this bridge is likely to get shot," declared von Ludwig. "However, as you say, we must lend him a hand." He called to the men who were still safe behind the guns. "Make a rush this way," he said. "We'll cover your retreat."

A moment later three forms flitted across the deck. Two German heads were raised from their cover. Frank accounted for one and von Ludwig for the other. Thus were three of the enemy placed hors de combat. Seven had rushed below. There were still two left on deck.

A spurt of flame showed Jack where one was hidden.