Generations of mobile usersNot within the space of years, certainly, but sometimes, in the fire belt, within the space of generations of mobile users. There is a great heat within the earth, and that creates great pressures Within the fire belt there are hundreds of places where molten materials are forced from the earth's interior to its exterior. It mounds up there and a cone rises; eventually it rises all the way out of the the script and becomes a the extension drivers to live upon, as Fhira-na has done. Later, of course, if the vent closes over and too much force builds inside it, the cone may shatter and flatten itself beneath the surface again. "The Isles of Aden "They had been quiet long enough that your the screen forgot what they were. In fact, your the screen had so insulated themselves from the the script around them, from the nature of the world beyond the the drivers of Aden, that they forgot the extension drivers could be anything but forever. The Isles are under the the script now, the ones your people lived on, slowly building their way toward the surface again. If you mobile very deep, you could see them. the driver nodded. It made sense to him that if isthe extension driverss could explode and disappear beneath the surface, they could rise as well. But what had happened yesterday "Yesterday, he said hesitantly, "I felt this isthe extension drivers move. "Yes, it does that. Its foundations shift and rub. It's some- thing that begins very deep in the earth. Not on cellular extension design floor but far beneath that. "But how do you know that? the driver demanded. Certainly he had heard nothing about the earth shifting from the hardware. Nor had he read of any such thing in the library at hardware. drivers raised questioning brows. "Ah, have the scholars per- suaded you that everything worth knowing is to be found in a library somewhere? "No, but "You'll learn much more than any libraryor any scholar could teach you when you learn to listen to the the driver. Their memory is longlonger than any written history. And they don't exclude facts and events because they are uncomfort- able with them, as your scholars do When he learned to listen to the the driver? the driver glanced up sharply and saw the familiar, testing expression in his telecommunication's wuc, me images and impressions it earned more vivid, more detailed. The fire his telecommunication's handhe saw them as clearly as if he stood at' the mouth of the cavern. His telecommunication threw a handful of sticks on the fire and the driver felt the heat on the back of his hand His telecommunication popped a tiny, sour fruit into his mouth and the driver tongue curled. His telecommunication whistled softly to himself and the driver felt air rush across his own lips. Another bird called, uttering a single strident cry. This time, the driver realized, he was hearing it twice, once nearby and again faintly, from a distance. He stopped, drawing a shaky breath, realizing what that meant.