"Yes. I only arrived today, and was having a consultation with the Turkish admiral when this disaster occurred." "Have you any idea what caused this disaster?" asked Frank quietly. "I guess there is no doubt what caused it. A British or a French submarine." At this moment Jack took a hand in the conversation. "You say you are the new military governor of the city?" "Yes." "Then you know something of the plans of defense?" "Well, rather. I have them in my pocket." "Then," said Jack, "I should say that you are a very indiscreet sort of a military governor." "What do you mean by that?" asked the German, half rising. Jack's reply was addressed to Frank. "Cover him with your gun, quick!" he commanded. "Don't let him get away." Although taken by surprise, Frank acted quickly. His gun leaped from his pocket and was levelled at the new German military governor of Constantinople. "What's the meaning of this?" demanded the latter angrily. "The meaning is that you are our prisoner," replied Jack quietly. "Turn her about, Frank," he added, "and we'll go back to the submarine." "Submarine!" exclaimed the German. "Oh, I see, you are British." "You bet we are," replied Frank. The German grew silent, and Jack, who was watching him carefully even as he rowed, noticed that he was fumbling in his breast pocket. "Watch him, Frank," he cried. "Don't let him throw anything overboard." Frank leaned forward and pressed the muzzle of his automatic against the German's breast. "No tricks," he said quietly, "or you are a dead man." The German's hand dropped to his side. The lads rowed back to the submarine quickly. Frank jumped aboard first and Jack waited until the German had followed him before he climbed up and drew the little boat up after him. Then all went below, Frank keeping his weapon on the German as they descended. Lord Hastings came bustling out. "Back so----" he began, and stopped in surprise at the sight of the third man. "What is this?" he demanded. "This," said Jack, with a flourish of his hand, "is the new German military governor of Constantinople." "But," said Lord Hastings, "why do you bring him here? What do we want with him?" "He told me, confidentially," said Jack, "that he carries the Turkish plan of campaign." Lord Hastings understood in a moment. "In that case," he said, "we want him badly. Mr. Military Governor, you are indeed welcome." "And the first thing to do," said Jack, "is to get the papers before he can get rid of them." "His Excellency will give them to us, I am sure," said Lord Hastings. "I will not," growled the German. "Then we shall have to take them," said Jack. He stepped suddenly forward and seized the German in a firm embrace. "You take them while I hold him," he called. In vain did the German struggle. Jack held him firmly while Frank and Lord Hastings explored his pockets and took therefrom every piece of paper they could find. Lord Hastings glanced them over carefully.