"We ran those intercepts through Harvest backwards and forwards. The lights dimmed in Washington and Baltimore, we used to say, when we were doing Arethusa work. I still have the opening groups memorized: AADAA FGTAA and so on. Those double As! People wrote dissertations about their significance. We concluded in the end that they were just flukes. We invented entire new systems of cryptanalysis to attack it—wrote new volumes of the Cryptonomicon . The data were very nearly random. Finding patterns in them was like trying to read a book that had been burned, and its ashes mixed with all the cement that went into the Hoover Dam. We never got anything that was worth a damn.