Oddly, though, it was that small subset of Standard that was the most susceptible to change. Highly esoteric scientific or technical papers written in 2000 G.E. were still easily readable. Slangy, colloquial passages in fiction, especially in dialogue, became almost unintelligible within five hundred years. The language shared by the most different communities was the language that changed the most. But over time, that mainstream language always changed together. It made no sense, then, for there ever to be linguistic diversity. Language changed most when it was most unified. Therefore when people were most divided, their language should remain most similar.

Never mind, Leyel. You're out of your discipline. Any competent linguist would know the answer to that.

But Leyel knew that wasn't likely to be true. People immersed in one discipline rarely questioned the axioms of their profession. Linguists all took for granted the fact that the language of an isolated population is invariably more archaic, less susceptible to change. Did they understand why?

Leyel got up from his chair. His eyes were tired from staring into the lector. His knees and back ached from staying so long in the same position. He wanted to lie down, but knew that if he did, he'd fall asleep. The curse of getting old-- he could fall asleep so easily, yet could never stay asleep long enough to feel well rested.

He didn't want to sleep now, though. He wanted to think.

No, that wasn't it. He wanted to talk. That's how his best and clearest ideas always came, under the pressure of conversation, when someone else's questions and arguments forced him to think sharply. To make connections, invent explanations. In a contest with another person, his adrenaline flowed, his brain made connections that would never otherwise be made.

Where was Deet? In years past, he would have been talking this through with Deet all day. All week. She would know as much about his research as he did, and would constantly say "Have you thought of this?" or "How can you possibly think that!" And he would have been making the same challenges to her work. In the old days.

But these weren't the old days. She didn't need him any more-- she had her friends on the library staff. Nothing wrong with that, probably. After all, she wasn't thinking now, she was putting old thoughts into practice. She needed them, not him.

But he still needed her. Did she ever think of that? I might as well have gone to Terminus-- damn Hari for refusing to let me go. I stayed for Deet's sake, and yet I don't have her after all, not when I need her. How dare Hari decide what was right for Leyel Forska!

Only Hari hadn't decided, had he? He would have let Leyel go without Deet. And Leyel hadn't stayed with Deet so she could help him, with his research. He had stayed with her because... because...

He couldn't remember why. Love, of course. But he couldn't think why that had been so important to him. It wasn't important to her. Her idea of love these days was to urge him to come to the library. "You can do your research there. We could be together more during the days."

The message was clear. The only way Leyel could remain part of Deet's life was if he became part of her new "family" at the library. Well, she could forget that idea.

If she chose to get swallowed up in that place, fine. If she chose to leave him for a bunch of indexers and cataloguers-- fine. Fine.

No. It wasn't fine. He wanted to talk to her. Right now, at this moment, he wanted to tell her what he was thinking, wanted her to question him and argue with him until she made him come up with an answer, or lots of answers. He needed her to see what he wasn't seeing. He needed her a lot more than they needed her.

He was out amid the thick pedestrian traffic of Maslo Boulevard before he realized that this was the first time since Hari's funeral that he'd ventured beyond the immediate neighborhood of his apartment. It was the first time in months that he'd had anyplace to go. That's what I'm doing here, he thought. I just need a change of scenery, a sense of destination. That's the only reason I'm heading to the library.

All that emotional nonsense back in the apartment, that was just my unconscious strategy for making myself get out among people again.

Leyel was almost cheerful when he got to the Imperial Library. He had been there many times over the years, but always for receptions or other public events-- having his own high-capacity lector meant that he could get access to all the library's records by cable. Other people-- students, professors from poorer schools, lay readers-- they actually had to come here to read. But that meant that they knew their way around the building. Except for flnding the major lecture halls and reception rooms, Leyel hadn't the faintest idea where anything was.

For the first time it dawned on him how very large the Imperial Library was. Deet had mentioned the numbers many times-- a staff of more than five thousand, including machinists, carpenters, cooks, security, a virtual city in itself-- but only now did Leyel realize that this meant that many people here had never met each other. Who could possibly know five thousand people by name? He couldn't just walk up and ask for Deet by name. What was the department Deet worked in? She had changed so often, moving through the bureaucracy.

Everyone he saw was a patron-- people at lectors, people at catalogues, even people reading books and magazines printed on paper. Where were the librarians? The few staff members moving through the aisles turned out not to be librarians at all-- they were volunteer docents, helping newcomers learn how to use the lectors and catalogues. They knew as little about library staff as he did.

He finally found a room full of real librarians, sitting at calculators preparing the daily access and circulation reports. When he tried to speak to one, she merely waved a hand at him. He thought she was telling him to go away until he realized that her hand remained in the air, a finger pointing to the front of the room. Leyel moved toward the elevated desk where a fat, sleepy-looking middle-aged woman was lazily paging through long columns of figures, which stood in the air before her in military formation.

"Sorry to interrupt you," he said softly.

She was resting her cheek on her hand. She didn't even look at him when he spoke.

But she answered. "I pray for interruptions."

Only then did he notice that her eyes were framed with laugh lines, that her mouth even in repose turned upward into a faint smile.

"I'm looking for someone. My wife, in fact. Deet Forska."

Her smile widened. She sat up. "You're the beloved Leyel."

It was an absurd thing for a stranger to say, but it pleased him nonetheless to realize that Deett must have spoken of him. Of course everyone would have known that Deet's husband was the Leyel Forska. But this woman hadn't said it that way, had she? Not as the Leyel Forska, the celebrity. No, here he was known as "the beloved Leyel." Even if this woman meant to tease him, Deet must have let it be known that she had some affection for him. He couldn't help but smile. With relief. He hadn't known that he feared the loss of her love so much, but now he wanted to laugh aloud, to move, to dance with pleasure.

"I imagine I am," said Leyel.

"I'm Zay Wax. Deet must have mentioned me, we have lunch every day."

No, she hadn't. She hardly mentioned anybody at the library, come to think of it.

These two had lunch every day, and Leyel had never heard of her. "Yes, of course," said Leyel. "I'm glad to meet you."

"And I'm relieved to see that your feet actually touch the ground."

"Now and then."

"She works up in Indexing these days." Zay cleared her display.

"Is that on Trantor?"