"What's that?" Colonel Fraser echoed. Then, with a shake of his head, "No, there's nothing else here. Just his agents, the dates they are to report to Duisburg, and the data on our air forces in England. But what makes you think, it's to be a blow against our air forces?" "A hunch, Dawson would call it, sir," Freddy Farmer replied. Then, leaning forward with a very earnest expression on his face, he continued, "On the face of it, sir. I mean, all his agents are to report to Duisburg at certain dates. Very well, it's obvious that he can't rely on his memory. He has to put details down on paper. In code, true, but still down in black and white. Well, doesn't it strike you that Herr Baron planned to go to Duisburg, too, and that _his_ report will be _complete_ information on our air forces in England that he and his agents have collected? _If_ there is any secret business being prepared for us at Duisburg, doesn't it seem logical that it will ultimately be directed at our air forces? Is there anything that we have that the Nazis would rather smash than our air power? Of course, I may be all wrong to--" "But you're not all wrong, far from it!" Major Crandall broke in. "I think you've hit the nail right on the head. Now that you've put it that way, a lot of things seem to check. And one item is something that it hurts to mention. It's that I haven't been able to contact a single one of my men posted in the Duisburg area for over a month. I am afraid they're dead. They found out the secret, but paid with their lives before they could get word through to me." "Farmer must be right!" Colonel Fraser said, tight-lipped, as though he were speaking to himself. "Both Hall and Perkins were to have reported from that area days ago. And there hasn't been a single word from either of them." Silence settled over the room as the Colonel's words were lost to the echo. Presently Dawson opened his mouth to speak, but seemed to think better of it, and reddened and closed his lips. A few moments later, though, he gave a little stubborn shake of his head. "Would it help if Farmer and I took a crack at it, sir?" he asked. Colonel Fraser looked at him in frowning bewilderment. "A crack at what, Dawson?" he demanded. Dave hesitated, and his face was fiery red when he spoke. "Getting to Duisburg, sir," he said slowly, "and trying to find out just what's to happen on the seventeenth of this month." The colonel blinked, looked just a trifle annoyed, and opened his mouth to speak. However, he changed his mind and smiled faintly.