Roger and Jimmy, sitting in the cave with the light turned low, presently heard a slight noise. At first they imagined it was made by one of their prisoners, but a moment of listening told them it was from another source. "The Fritzies are coming!" whispered Roger. "Be ready," advised his chum. "Have you the rifle?" "Yes; and Wilbur's revolver, too." "Good! Here they are, and out goes the glim!" As he spoke Jimmy turned down the lantern completely, and there followed a guttural exclamation. "Why is the darkness?" asked a voice in English. "Are you there Herren Bixtons?" "Um," murmured Jimmy, nudging Roger. "What is the matter?" asked the voice of the unseen one again. "You tell us to meet you here, and yet you have no light." "Out of oil," growled Jimmy. "Maybe you have a flashlight. " "It is out of oil, too!" laughed a second man, and both voices had an unmistakable German accent, though English was spoken fluently enough. "It gives but a little glow. But we have matches, and if there is a bit of a candle----" "No candle!" returned Jimmy, trying to disguise his voice. "Nothing seems to burn in this rotten hole of a cave," he went on. "It's as damp as a swamp. I've caught such a cold I can hardly speak." "I was wondering what was the matter with your voice, Herr Wilbur," went on the voice. "Well, we are here, and we do not need to stay long, I suppose. It is not a nice place. As you say it is damp, and, too, there is always danger of discovery. You have brought the information we want, I dare say?" was the question. "Did you bring more money?" demanded Jimmy, making his tones hoarse. "We've got to have more money, Mr.--er--Ammann." To his surprise the man laughed. What could occasion mirth at a time like this? Was the trick of Roger and Jimmy discovered? The next moment he felt a wave of relief as the man said: "_Ach!_ that's what you always do, even in daylight--mistake me, Herr Anker, for Herr Ammann. You Americans are not so smart as you all think, not to know us apart." Then Jimmy knew he had played to pure luck, and he was filled with delight. "Well, did you bring the money?" asked Jimmy, following a lead given him by the two prisoners now bound and gagged. "Yes, we have a little more," answered the other German. "But it is hard to get now. Here it is--in gold. Now you have the plans all made for sending up the smoke signals, yes?" "We have plans, yes," answered Jimmy. But he did not say what plans they were. Incidentally, they involved the capture of Herr Anker and Herr Ammann.