“I have told you,” said Lord Hastings calmly, “that we are not the same submarine that pursued you. You don’t believe it. Very well. However, you will learn that you cannot run away from us as you did the other.”

“We shall see,” said the Russian.

“Oh, you’ll see, all right,” said Lord Hastings. “However, we are here and that’s all there is about it. Now, if you will not have us confined, we promise to make no attempt to escape.”

The Russian considered this proposal for some minutes.

“Very well,” he said at last. “I shall accept your paroles. See that you do not attempt to break them.”

He turned and went on deck.

Five minutes later and the Russian cruiser had come about and was heading east once more. Gradually she gathered headway, until she was traveling at full speed.

The Russian kept close watch on the D-16, which now lay to the rear. And as the cruiser began to draw away, the D-16, which had been lying idle, also came to life, and started in pursuit.

Frank, aboard the submarine, was greatly puzzled when the cruiser came about and started off toward the east.

“Wonder what on earth the reason is?” he muttered to himself. “Well, I suppose we had better go along also.”