Hardly had Harris taken his departure when running feet approached Jack's cabin. A moment later a crowd of sailors burst into the room. Before Jack realized what was going on, they had seized him, hoisted him to their shoulders and rushed out on deck again. There, for perhaps half an hour, they paraded up and down, cheering wildly. They lowered him to the deck, however, when Captain Raleigh and Captain Reynolds approached. The former spoke first. "I must congratulate you upon your remarkable exhibition," he said. "You are a brave boy." Jack flushed and hung his head. "When I am mistaken I admit it," said Captain Reynolds. "You are more than a match for Harris at any time." "I did the best I could," said Jack, sheepishly. "Well, it was pretty good," said Captain Reynolds. With Captain Raleigh he moved away. Frank now approached and accompanied Jack back to their cabin, where Jack got info his uniform. "Some scrapper, you are," said Frank. "I thought you were done for once or twice, though." "I thought so myself," returned Jack, with a grin. "I was pretty lucky in that last round, if you ask me." "Harris was pretty unlucky, I know that," said Frank, grimly. "Hurry up, it's time to eat." Jack's fight was the talk of the day aboard the _Queen Mary_; and aboard the _Indefatigable_, too, for that matter. In fact, all the British fleet within wireless radius knew before night that there was a new champion of the British fleet; and they cheered him, though he could not hear. It was upon the following morning, while the _Queen Mary_ steamed about in the North Sea, that Jack and Frank embarked upon their first piece of work since they had been assigned to the giant battleship. Both lads were in their cabin studying, when an orderly announced that Captain Raleigh desired their presence. They obeyed the summons at once. "And how do you feel today?" asked Captain Raleigh, as he eyed Jack, quietly. "First rate, sir." "Feel like another fight?" "No, sir. I don't make a practice of that sort of thing." "I'm glad to hear that. How would you like to take a little trip?" "First rate, sir. Where to, sir?" "Well, that's rather a difficult question," returned Captain Raleigh. "Here, read this," and he passed the lad a slip of paper. Jack did as commanded. This is what he read: "Large number of enemy aircraft reported flying over North Sea, fifty miles south of you, every night. Investigate. (Signed) "BEATTY." Jack passed the slip of paper back. "Well?" exclaimed Captain Raleigh. "Yes, sir," replied Jack. "You want me to find out what's going on, sir?" "Exactly. Can you run a hydroplane?" "No, sir; but Frank here can." "Who?" "Lieutenant Chadwick, sir." "Oh," said the commander, "so he is Frank, eh? All right. Then here is what I want you two to do. Take the hydroplane aft and fly south. Take your time and see what you can find out. The matter may amount to nothing, and then again it may forebode something serious."