For days thereafter Hari Seldon neglected his departmental duties to use his computer in its news-gathering mode.

There were not many computers capable of handling the daily news from twenty-five million worlds. There were a number of them at Imperial headquarters, where they were absolutely necessary. Some of the larger Outer World capitals had them as well, though most were satisfied with hyperconnection to the Central Newspost on Trantor.

A computer at an important Mathematics Department could, if it were sufficiently advanced, be modified as an independent news source and Seldon had been careful to do that with his computer. It was, after all, necessary for his work on psychohistory, though the computer’s capabilities were carefully ascribed to other, exceedingly plausible reasons.

Ideally the computer would report anything that was out of the ordinary on any world of the Empire. A coded and unobtrusive warning light would make itself evident and Seldon could track it down easily. Such a light rarely showed, for the definition of “out of the ordinary” was tight and intense and dealt with large-scale and rare upheavals.

What one did in its absence was to ring in various worlds at random—not all twenty-five million, of course, but some dozens. It was a depressing and even debilitating task, for there were no worlds that didn’t have their daily relatively minor catastrophes. A volcanic eruption here, a flood there, an economic collapse of one sort or another yonder, and, of course, riots. There had not been a day in the last thousand years that there had not been riots over something or other on each of a hundred or more different worlds.

Naturally such things had to be discounted. One could scarcely worry about riots any more than one could about volcanic eruptions when both were constants on inhabited worlds. Rather, if a day should come in which not one riot was reported anywhere, that might be a sign of something so unusual as to warrant the gravest concern.

Concern was what Seldon could not make himself feel. The Outer Worlds, with all their disorders and misfortunes, were like a great ocean on a peaceful day, with a gentle swell and minor heavings—but no more. He found no evidence of any overall situation that clearly showed a decline in the last eight years or even in the last eighty. Yet Demerzel (in Demerzel’s absence, Seldon could no longer think of him as Daneel) said the decline was continuing and he had his finger on the Empire’s pulse from day to day in ways that Seldon could not duplicate—until such time as he would have the guiding power of psychohistory at his disposal.

It could be that the decline was so small that it was unnoticeable till some crucial point was reached—like a domicile that slowly wears out and deteriorates, showing no signs of that deterioration until one night when the roof collapses.

When would the roof collapse? That was the problem and Seldon had no answer.

And on