“Benson, you infernal cheat, you!” muttered Truax, and started to get out of the berth.  But he was weak, and the attendant had no difficulty in thrusting him back.

“In view of what you’ve been telling us, you’d better not sprinkle bad names about,” said the surgeon, turning on his heel.  He was followed by the others, all chuckling.

“Mr. Benson,” said Doctor McCrea, when the party was in the cabin, “are you my friend?”

“I certainly am, sir,” cried Jack warmly.

“Thank you,” said the doctor, making a comical face.  “With your head for doing things, Mr. Benson, I feel safer with your friendship than I should if I had your enmity.”

While they were still chatting in the cabin of the gunboat a shot sounded on deck.  Then a corporal of marines rushed in, saluting.

“The prisoner, Truax, sir, escaped while walking under guard on deck.  He dived headlong, sir.  The marine guard fired after him through the darkness, sir.  The officer of the deck sends his compliments, sir, and wants to know if Truax is to be pursued in a small boat.”

“At once, and with all diligence,” ordered the lieutenant commander.

Though a thorough search was made, Truax was not found.  It was thought that the fellow had been drowned.  But months later it was learned that he was skulking in Europe with Tip Gaynor, who had received word in time to make his escape also.

For two days more the instruction continued at sea.  Then, the tour of instruction over, the little flotilla returned to the Academy at Annapolis.  From there Captain Benson wired Mr. Farnum for further orders.  Without delay came back the dispatch: 

“Navy Department requests that for present ‘Farnum’ be left at Annapolis.  You and crew return by rail when ready.”

Soon after this Jack was informed that the Annapolis police had run down the mulatto who had decoyed the young submarine skipper on that memorable night.  Jack’s money, watch and other valuables were later recovered and returned to him.

Just before Jack and his mates were to leave the “Farnum” for the last time, Lieutenant Commander Mayhew came aboard, followed by Ensign Trahern and three of the midshipmen who had been under submarine instruction.

“Mr. Benson and gentlemen,” said Mr. Mayhew, “I shall not make a set speech.  What I have to say is that the cadet midshipmen who have been under your capable and much-prized instruction of late wish each of you to take away a slight memento of your stay here.”

Machinist Williamson had not been omitted.  Each of the four received from the lieutenant commander a small box, each containing a small gold shield.  In the center was the coat of arms of the United States Naval Academy.  At the top of each pin was the name of the one to whom it was given.  Across the bottom were the words: 

FROM THE
BATTALION OF NAVAL CADETS
IN KEEN APPRECIATION
OF ADMIRABLE INSTRUCTION