To say that the signal was neglected by the crew at the Vulcan Nexus would be untrue and unfair. It was simply never seen. The whole display array had been installed in the main control room of the Nexus for the benefit of visiting dignitaries and the media. “There!” — a wave of the hand — “The power equation of the whole system at a glance. Left side, energy supply. Each light shows energy collection from a solar panel. The individual demands are on the right.”

The visitors took a moment or two to examine the array of gently winking lights, and the tour went on. The impressive part was still to come, with the powered swoop past four hundred million square kilometers of collectors, each sucking in Sol’s radiance. The array orbited only two million kilometers above the photosphere, where Sol’s flaming disk filled thirty degrees of the sky. It was an unusual visitor who gave the display room a second thought after a roller-coaster ride to the solar furnace, skimming over vast hydrogen flares and the Earth-size-swallowing whirlpools of the sunspots.

So the overload signal was seen by no one. But human ignorance of minor energy fluctuations was no cause for concern. Supply and demand had long been monitored by an agent far more efficient and conscientious than unreliable homo sapiens. The distributed computing network of Dominus at once noted the source of the energy drain. It was coming from Cobweb Station, twelve billion kilometers from the Sun. In less than one hour, energy demand at Cobweb had increased by a factor of one hundred. Even as that information came through the computer network, a second light went on in the displays. Energy use had increased again, by another factor of a hundred.

Dominus switched in an additional power supply from the orbiting fusion plants out near Persephone. Reserve supply was more than adequate. There was no sign of emergency, no thought of disaster. But Dominus initiated a routine inquiry as to the cause of the increased energy demand and its projected future profile.