What prodigies of human inventiveness, Ellie reflected, were being directed to reading each other's mail.
The global confrontation between the United States and the Soviet Union—now, to be sure, easing somewhat—was still eating up the world. It was not just the financial resources dedicated to the military establishments of all nations. That was approaching two trillion dollars a year, and by itself was ruinously expensive when there were so many other urgent human needs. But still worse, she knew, was the intellectual effort dedicated to the arms race.
Almost half the scientists on the planet, it had been estimated, were employed by one or another of the almost two hundred military establishments worldwide. And they were not the dregs of the doctoral programs in physics and mathematics. Some of her colleagues would console themselves with this thought when the awkward problem arose of what to tell a recent doctoral candidate being courted by, say, one of the weapons laboratories. “If he was any good, he'd be offered an assistant professorship at Stanford, at least,” she could recall Drumlin once saying. No, a certain kind of mind and character was drawn to the military applications of science and mathematics—people who liked big explosions, for example; or those with no taste for personal combat who, to avenge some schoolyard injustice, aspired to military command; or inveterate puzzle solvers who longed to decrypt the most complex messages known. Occasionally the spur was political, tracing back to international disputes, immigration policies, wartime horrors, police brutality, or national propaganda by this nation or that decades earlier. Many of these scientists had real ability, Ellie knew, whatever reservations she might have about their motivations. She tried to imagine that massed talent really dedicated to the well-being of the species and the planet.
She pored over the studies that had accumulated during her absence. They were making almost no progress in decrypting the Message, although the statistical analyses now stacked into a pile of paper a meter tall. It was all very discouraging.
She wished there were someone, especially a close woman friend, at Argus to whom she could pour out her hurt and anger at Ken's behavior. But there was not, and she was disinclined even to use the telephone for this purpose. She did manage to spend a weekend with her coUege friend Becky Ellenbogen in Austin, but Becky, whose appraisals of men tended to be somewhere between wry and scathing, in this case was surprisingly mild in her criticism.
“He is the President's Science Adviser, and this is only the most amazing discovery in the history of the world. Don't be so hard on him,” Becky urged. “He'll come around.”
But Becky was another of those who found Ken “charming” (she had met him once at the dedication of the National Neutrino Observatory), and was perhaps too inclined to accommodate to power. Had der Heer treated Ellie in this shabby way while he was a mere professor of molecular biology somewhere, Becky would have mari-nated and skewered the man.
After returning from Paris, der Heer had mustered a regular campaign of apology and devotion. He had been overstressed, he told her, overwhelmed with a range of responsibilities including difficult and unfamiliar political issues. His position as leader of the American delegation and co-chairman of the plenary might have been rendered less effective if there had been public knowledge of his and Ellie's relationship. Kitz had been insufferable. Ken had had too many consecutive nights with only a few hours” sleep. Altogether, Ellie judged, there were too many explanations. But she permitted the relationship to continue.
When it happened, it was Willie once again, this time on the graveyard shift, who first noticed. Afterward, Willie would attribute the speed of the discovery less to the superconducting computer and the NSA programs than to the new Hadden context-recognition chips. At any rate, Vega had been low in the sky an hour or so before dawn when the computer triggered an understated alarm. With some annoyance, Willie put down what he was reading—it was a new textbook on Fast Fourier Transform Spectroscopy— and noticed these words being printed out on the screen:
RPT. TEXT PP. 41617–41619: BIT MISMATCH 0/2271. CORRELATION COEFFICIENT 0. 99+
As he watched, 41619 became 41620 and then 41621. The digits after the slash were increasing in a continuous blur. Both the number of pages and the correlation coefficient, a measure of the improbability that the correlation was by chance, increased as he watched. He gave it another two pages before picking up the direct line to Ellie's apartment.
She had been in a deep sleep and was momentarily disoriented. But she quickly turned on the bedside light and after a moment gave instructions for senior Argus staff to be assembled. She would, she told him, locate der Heer, who was somewhere on the facility. This proved not very difficult. She shook his shoulder.
“Ken, get up. There's word that we've repeated.”
“What?”
`The Message has cycled back. Or at least that's what Willie says. I'm on my way there. Why don't you wait another ten minutes so we can pretend you were in your room in BSQ?”
She was almost at the door before he shouted after her, “How can we recycle? We haven't gotten the primer yet.”
Racing across the screens was a paired sequence of zeros and ones, a real-time comparison of the data just being received and the data from an early page of text received at Argus a year before. The program would have culled out any differences. So far, there were none. It reassured them that they had not mistranscribed, that there were no apparent transmission errors, and that if some small dense interstellar cloud between Vega and the Earth was able to eat the occasional zero or one, this was an infrequent occurrence. Argus was by now in real-time communication with dozens of other telescopes that were part of the World Message Consortium, and the news of recycling was passed on to the next observing stations westward, to California, Hawaii, the Marshal Nedelin now in the South Pacific, and to Sydney. Had the discovery been made when Vega was over one of the other telescopes in the network, Argus would have been informed instantly.
The absence of the primer was an agonizing disappointment, but it was not the only surprise. The Message page numbers had jumped discontinuously from the 40,000s to the 10,000s, where recycling had been uncovered. Evidently Argus had discovered the transmission from Vega almost at the moment it first arrived at Earth. It was a remarkably strong signal, and would have been picked up even by small omnidirectional telescopes. But it was a surprising coincidence that the broadcast should arrive at Earth at the very moment Argus was looking at Vega. Also, what did it mean for the text to begin on a page in the 10,000s? Were there 10,000 pages of text missing? Was it a backward practice of the provincial Earth to start numbering books on page I? Were these sequential numbers perhaps not page numbers but something else? Or— and this worried Ellie the most—was there some fundamental and unexpected difference between how humans thought of things and how the aliens thought? If so, it would have worrisome implications about the ability of the Consortium to understand the Message, primer or no primer.