He remained in the command center discussing details of the probe for a full hour after he was officially off duty, and then at last excused himself and retired to his private quarters. After a shower and a change of clothes he sat down at the desk in his stateroom and interrogated the terminal for a listing of the day’s mail. One item that had come in was qualified as a text message from Vie Hunt at Navcomms Headquarters. Shannon was both pleasantly surprised and intrigued. He had had many interesting talks with Hunt during the latter’s stay on Ganymede, and didn’t perceive him as being somebody with much time for idle socializing, which suggested that something interesting was afoot. Curious, he keyed in a command for Hunt’s message to be displayed. Five minutes later he was still sitting there staring at the message, his brows knitted in a mystified frown. It read:
Joe,
To avoid any further cross words on this subject, I looked for some clues in the book you mentioned and came across some references on pages 5, 24, and 10. When you get down to sections 11 and 20, it all makes more sense.
How they got 786 is stifi a puzzle.
Regards
Vie
Not a word of it meant anything to him. He knew Hunt well enough to be reasonably sure that something serious was behind the message, and all he could think of was that Hunt was trying to tell him something highly confidential. But why would Hunt go to this kind of trouble when UNSA possessed a perfectly adequate system of security codes? Surely it wasn’t possible that somebody could be eavesdropping on the UNSA net, somebody equipped with enough computer power to render its protective measures unreliable. On the other hand, Shannon reflected soberly, the Germans had thought exactly that in World War II, and the British, with their “Turing Engine” at Bletchley, had been able to read the complete radio traffic between Hitler and his generals, frequently even before the intended recipients. Certainly this message would mean nothing to any third party even though it had come through in plain English, which made it appear all the more innocuous. The problem was that it didn’t mean anything to Shannon, either.
Shannon was still brooding about the message early the next morning when he sat down for breakfast in the senior officers’ dining quarters. He liked to eat early, before the captain, the first navigation officer, and the others who were usually on early shift appeared. It gave him time to collect his thoughts for the day and keep up with events elsewhere by browsing through the Interplanetary Journal-a daily newspaper beamed out from Earth by UNSA to its various ships and installations all over the solar system. The other reason he liked to be early was that it gave him an opportunity to tackle the Journal’s crossword puzzle. He’d been an incurable addict for as long as he could remember, and rationalized his addiction by claiming that an early-morning puzzle sharpened the mental faculties in preparation for the demands of the day ahead. He wasn’t really sure if that were true, and didn’t care all that much either, but it was as good an excuse as any. There was nothing sensational in the news that morning, but he skimmed dutifully through the various items and arrived gratefully at the crossword page just as the steward was refilling his coffee cup. He folded the paper once, then again, and rested it against the edge of the table to scan through the clues casually while he felt inside his jacket for a pen. The heading at the top read: jouiNAL CROSSWORD PUZZLE NUMBER 786.
Shannon stiffened, his hand still inside his jacket, as the number
caught his eye. “How they got 786 is still a puzzle” replayed itself instantly in his mind. Every word of Hunt’s mysterious message had become firmly engraved by that time. “786” and “puzzle
both appearing in the same sentence. It couldn’t be a coincidence, surely. And then he remembered that Hunt had been a keen crossword solver too in his rare moments of free time; he had introduced Shannon to the particularly cryptic puzzles contained in the London Times, and the two of them had spent many a good hour solving them over drinks at the bar. Suppressing the urge to leap from his chair with a shout of Eureka!, he pushed the pen back into his pocket and felt behind it for the copy of the message tucked inside his wallet. He drew out the sheet of paper, unfolded it, and smoothed it flat on the table between the Journal and his coffee cup. He read it once again, and the words took on a whole new light of meaning.