"I knew perfectly well that only a handful of people in the world had the acumen to break the Enigma and then to cover up the fact that they had broken it. By using our intelligence sources to ascertain where these men were, and what they were doing, I could make inferences." Von Hacklheber stubs out his cigarette, sits up straight, and drains a half-shot of schnapps, warming to the task. "This was a human intelligence problem—not signals intelligence. This is handled by a different branch of the service—" and he’s off again talking about the structure of the German bureaucracy. Terrified, Shaftoe flees from the room, runs outside, and uses the outhouse. When he gets back, von Hacklheber is just winding up. "It all came down to a problem of sifting through large amounts of raw data—lengthy and tedious work."