"You are right," Stewart agreed; "besides, there is someone else whom I think much better worth looking at! The officers seem to share my opinion," he added, for more than one head was turned as they walked slowly down the platform. "I shall be jealous in a moment!" "Do not talk nonsense! Nothing is so absurd as for a man to make love to his wife in public!" Stewart would have liked to retort that he had, as yet, had mighty few opportunities in private, but he judged it best to save that remark for the other side of the frontier. "Just the same," she rattled on, "it was good of you to write so regularly while you were at Vienna. I am sure your letters helped with my cure. But you have not told me—have you secured our passage?" "I will know when we get to Brussels. Cook is trying to get us an outside room on the Adriatic." "Do we go back to England?" "Not unless we wish to. We can sail from Cherbourg." They had reached the end of the platform, and, as they turned, Stewart found himself face to face with a bearded German who had been close behind them, and who shot a sharp glance at him and his companion before stepping aside with a muttered apology. Not until they had passed him did Stewart remember that he had seen the man before. It was the surly passenger in the crowded compartment on the journey from Cologne. His companion had not seemed to notice the fellow, and went on talking of the voyage home and how glad she would be to get there. Not until they turned again at the farther end, and found the platform for a moment clear around them, did she relax her guard. "That man is a spy," she whispered, quickly. "We are evidently still suspected. What sort of railroad ticket have you?" "A book of Cook's coupons." "I feared as much. You must rid yourself of it—it is quite possible that you will be searched at the frontier. No, no," she added, as Stewart put his hand to his pocket. "Not here! You would be seen—everything would be lost. I will devise a way." Stewart reflected with satisfaction that only a few coupons were left in the book. But why should he be searched? He had thought the danger over; but he began uneasily to suspect that it was just beginning.