The question was solved for him when, some days later, he caught sight of a file of German soldiers passing through a ravine a little way below him. These were followed by others. He sought shelter instantly upon catching his first glimpse of them, but the bushes were thin at that point, and a huge tree seemed to offer a more secure refuge. He climbed it quickly, and, peering through the leaves, tried to figure out the situation. Rank after rank passed, and seemed to be taking up a position with the view of making an attack. Batteries were drawn up, and their guns pointed in a direction away from where Tom was hiding. This was a valuable, but at the same time a painful, bit of information, because it showed Tom that he was behind the German lines instead of in front of them. If he had been in front, it would be simply a matter of making his way in all haste to where the American armies lay. Now he knew that in order to reach his own lines he would have to cross through the German positions. And without weapons this could only be a forlorn hope. Even had he been armed it would have been a desperate chance. He was pondering this fact with a sinking of the heart, when suddenly he saw approaching a man in American uniform. What could it mean? The man was not a prisoner, or he would have been under guard. Yet what other explanation was there for the appearance of the uniform in the midst of the Germans, who swarmed all about? The man came nearer, until he paused beneath the tree. He looked about as though expecting to see some one. Then he glanced at the watch on his wrist, and uttered an exclamation of impatience. It was evident that he had made an appointment, and that the other party to the tryst was slow in coming. The day was warm, and the upward climb through the woods had been arduous. The man took his hat from his head and wiped his forehead with his handkerchief. As he did so, Tom caught his first glimpse of the newcomer's face, and his heart gave a leap of surprise as well as repulsion when he recognized Nick Rabig. The last news that Tom had had of Rabig was that he had been taken prisoner in the preceding Fall. He had not known, of course, of Nick's alleged escape from German captivity, and of his return to the American lines, but his quick mind readily reached the correct conclusion. He had always distrusted Rabig and had felt sure that the fellow was at heart a traitor. He was morally certain that the German corporal, whom Nick had been assigned to guard, had escaped with Rabig's connivance, and he remembered what Frank had told him about hearing Rabig's voice in the woods the night the German spy was shot. But Rabig's cunning, or perhaps his luck, had prevented his treachery being proved.