"Yes," replied Jack, returning the salute. "The gig is waiting to take you to the 'Sudbury' sir." This information was punctuated by another salute which Jack, as head of the party of three young officers, again returned. "Lead the way," directed Jack. For the third time saluting, the coxswain possessed himself of Jack's suit case and sword, then crossed the wharf to the landing stairs down below, the gunboat's cutter waited, a natty little craft, occupied by a bowman and four oarsmen. The three young officers seated themselves at the stern of the gig. "Cast off," directed the coxswain. "Up oars! Let fall! Give way!" With the long, steady, magnificent sweep of the Navy which the sailors pulled, the little gig seemed to race through the water. "Is that the 'Sudbury'?" inquired Jack, nodding toward a trim little gunboat some two hundred feet long. "Yes, sir." All three of the submarine boys gazed at the gunboat with secret enthusiasm. Had it not been for the guns fore and aft, and at the rail on either side, the "Sudbury" might have been mistaken for some multi-millionaire's yacht. In another moment the gig was making fast at the gangway. Then Jack Benson stepped out, and, heading his comrades, went up over the side. At the head of the gangway a corporal and four marines stood drawn up. At a low-voiced command from the corporal the marines presented arms, standing thus until the three new young officers, saluting, passed. Just beyond the marines, stood an officer of the Navy. He brought his hand to his cap in a smart salute. "Lieutenant Benson?" inquired this officer. "Yes." "I am Ensign Fullerton, executive officer of this vessel." They shook hands and Jack presented his comrades. "I think I had better show you to your cabin, sir," suggested Ensign Fullerton. "As you please," nodded Jack. The way was actually led, however, by three of the marines, who, at a word from the corporal, had possessed themselves of the limited baggage of the new arrivals. In Jack's cabin was a broad double berth, two deep wardrobe closets, a book-case, desk and several chairs. "I had no idea junior officers had such roomy quarters," murmured Jack. "They don't, usually, sir," smiled Fullerton. "But it's different, of course, in the case of the commanding officer." "But I'm not the commanding officer," gasped Jack. "For the purposes of this cruise you are," smiled Fullerton. "But I forget. You haven't received your orders. There they are on your desk. They arrived less than an hour ago by wire." Like one in a dream young Jack Benson picked up a bulky telegraph envelope and broke the seal. There, before his eyes, danced the words of the latest order from the Secretary of the Navy. Lieutenant Jack Benson was directed to take command of the United States gunboat, 'Sudbury,' until further orders. Ensigns Hastings and Somers were directed to assume such duties aboard as were assigned to them by Lieutenant Benson.