“Hold her there!”

Orders came thick and fast now.  Gradually the U-16 swerved a bit, to better bring her torpedo tubes to bear.  Lord Hastings gave a hurried order to Jack, who stood at his elbow.

“Let no one come near me here,” he said.  “It would not do to have Davis or one of the crew see what we are about to do.”

“No one shall pass me, sir,” was Jack’s quiet response.

“Good.  Signal No. 2 torpedo.”

Immediately upon going below Frank had ordered the men to their posts, where they now stood, eagerly expectant—­the German members of the crew because they believed a British ship was to be torpedoed, and the Englishmen because they knew a German craft of some kind had been encountered.

The electric signal board aboard the submarine now flashed red: 

“No. 2 torpedo!”

The man on duty there, who chanced to be a German, stood tense and expectant.

“How does she go above, sir?” asked Jack.

“Still a panic on the liner,” returned Lord Hastings.  “Several boats have been lowered safely, however, and are picking up those in the water.  If the German will withhold his fire for ten minutes, all will be saved.”

“Does he seem to be ready to fire, sir?”

“He seems to be holding off and I hope he does.  However, I’m ready, and we’ll beat him to it.”

“I——­” began Jack, and whirled about suddenly.  He had caught the sound of footsteps behind him.

The lad looked into the face of Davis.

“Stand back there!” he commanded sharply.

“Why?  What’s the matter?  What’s going on?” demanded the latter.

“None of your business,” replied Jack.  “Back now, quick!”

“Look here——­” began Davis.

“You heard me,” said Jack slowly and very quietly.  “Now obey and be quick about it.”

“By whose command?” inquired Davis with a leer.

“By mine,” returned Jack, restraining his temper with difficulty.

“I don’t recognize your authority,” declared Davis, and took another step forward.

Lord Hastings had been peering intently into the periscope and had paid no attention to what was going on behind him.  He had given Jack his orders and he knew they would be carried out.  However, now turning from the periscope to speak a word to the lad, he saw what was going on and he caught Jack’s last words and Davis’ reply.

“Then perhaps you will recognize mine,” he said.  “Stand back, sir!”

Without awaiting a reply he again turned to the periscope.  For a moment Davis hesitated and seemed about to protest, but Jack gave him time for no further words.

The lad stretched out a long arm quietly, seized Davis by the elbow, drew him toward him a pace, and then hurled him violently backward.  Davis went tumbling head over heels.  Jack wasted no further thought on him, and turned to Lord Hastings.

Davis, very angry, pulled himself slowly to his feet and glared at Jack evilly.  Suddenly he put his hand to his belt, whipped out his revolver, and levelled it straight at Jack.