"That depends on the purpose of the meeting," answered Frank. "You may be on German soil, but just now you are under American laws, and they don't allow such meetings unless permission is received in advance. Besides, Germans are forbidden to have arms. How about those weapons we've just taken away from you?" "If there are any laws like that they ought to be broken," replied the prisoner impudently. "Don't get gay with me now," said Frank, with an ominous glitter in his eyes. "We taught your armies a lesson not long ago, and you'll find that we can teach you civilians just as easily." "Our armies were not beaten," the man answered with a sudden flare of rage. "They could have fought for years if it had not been for the hunger at home." "They gave a pretty good imitation of beaten armies then," said Frank sarcastically, "and I had an idea that the Americans had something to do with the beating. But that's neither here nor there. What were you planning to do at Coblenz?" "Nothing," growled the prisoner. "That doesn't go with me," replied Frank. "I happened to hear some of that speech of yours and Coblenz was sprinkled through it rather thickly. Suppose you hand over to me that map with the red dots marked on it." "I have no map," the man replied, a look of apprehension coming into his eyes. "Lying again, are you?" said Frank. "Bart, cover this fellow with your rifle while Billy goes through his pockets." The prisoner's fist clenched, but a prod of Bart's rifle made him think better of it, and Billy drew from one of the inside pockets of the man's coat the identical map over which the group had been poring when Bart first came upon the scene. "That'll do," said Frank. "Go back to the wall and sit down. Your case will be attended to by the American authorities at Coblenz." The German, with a muttered imprecation, did as he was told, and while Bart kept his eye on the group of prisoners, Frank and the other Army Boys looked over the map. They had been so long in Coblenz that they knew the town from end to end, and could readily identify the places that on the map were splashed with red. They included all the places occupied as headquarters by staffs of the various brigades and divisions of the American Army, as well as the American hospital and other buildings devoted to army uses. "What do the red marks mean, do you think?" asked Billy, with lively curiosity. "Blood or bombs or something of that kind, I suppose," replied Frank. "Taking this with what I gathered from the fellow's speech, I think it marks places that are to be blown up. It looks like a general uprising against American rule. I think that Army headquarters will find this little sheet of paper an interesting thing to study. And it wouldn't surprise me very much if our genial friend over there should find himself before long standing before a firing squad." "What is this place here?" asked Tom, putting his finger on one of the red spots.