"We have men working in the shops. We have one man in the drawing office. All hands, even the clerical staff of these departments, work under oath of secrecy, and naval discipline." Von Salzinger smiled contemptuously. "This, however, does not impede our flow of information. The man in the drawing office has discovered that the plans are shortly to be photographed by the naval authorities. Further, they are testing a new light which seems to correspond with our new U-rays, which was found to be defective by us, and the vital parts of which Hertzwohl removed on his last visit to Borga. If this light should prove to be identical with the U-rays it suggests a further conspiracy. Hertzwohl contrived its faultiness himself, and seized the opportunity of removing the vital parts of the--_only_--lamp we possessed. It suggests that the whole thing was carefully planned and carried out by--Hertzwohl." The only sign from Von Berger was a curious flicker of the eyelids. The unyielding expression of his keen face never varied for one moment. "This man Farlow--Ruxton Farlow?" Von Salzinger shook his head. "For the moment he is beyond our reach. He is a Minister in the British Cabinet." "Yes." For some moments neither spoke. Von Salzinger watched this man whom he feared more than any man in Berlin. He was wondering at the activity behind those cold eyes. He was speculating as to the direction in which that force would drive. He labored under no delusion. The conduct of this affair was to be removed from his hands. It was an added bitterness, but a certain relief left it not without compensation. If this matter were successfully dealt with, no matter by whom, it must redound to his advantage. Von Berger did not leave him long in doubt. "It may be possible to destroy those plans--before they are copied," he said. "If they have already been traced, still it will be a proper step. They may even have neglected to trace them--these English. I must see Stryj at once. You will telephone him. Not now," as Von Salzinger rose with alacrity to obey. "There is another matter to be dealt with first. Hertzwohl has got away. He must be silenced. He must be punished. If he is in England--of which I have no doubt, he would be even less safe elsewhere--he is to be run to earth, and his power for further mischief must be--cut off. You understand." Von Salzinger's eyes were full of meaning as he nodded, but there was no fraction of change in the other's. Von Berger drew a note-book from his pocket, and turned some odds and ends of papers over. Finally he selected one. He held it out, and his level eyes forced Von Salzinger's till the latter felt that the remotest secrets could be penetrated by their cold intensity. "You know that place?" he enquired. Von Salzinger read-- "Redwithy Farm, Wednesford, Bucks." He drew a deep breath. At the sound of it Von Berger's eyelids flickered. "Yes." Von Salzinger's eyes were slowly raised to the other's.