"Your eyes have not yet failed you," Master Ultan said after a time. "Do you apprehend any termination to this aisle?"

"No, sieur," I said, and in fact I did not. As far as the candlelight flew there was only row upon row of books stretching from the floor to the high ceiling. Some of the shelves were disordered, some straight; once or twice I saw evidence that rats had been nesting among the books, rearranging them to make snug two and three-level homes for themselves and smearing dung on the covers to form the rude characters of their speech.

But always there were books and more books: rows of spines in calf, morocco, binder's cloth, paper, and a hundred other substances I could not identify, some flashing with gilt, many lettered in black, a few with paper labels so old and yellowed that they were as brown as dead leaves.

" 'Of the trail of ink there is no end,' " Master Ultan told me. "Or so a wise man said. He lived long ago - what would he say if he could see us now? Another said, 'A man will give his life to the turning over of a collection of books,'

but I would like to meet the man who could turn over this one, on any topic."

"I was looking at the bindings," I answered, feeling rather foolish.

"How fortunate for you. Yet I am glad. I can no longer see them, but I remember the pleasure I once had in doing it. That would be just after I had become master librarian. I suppose I was about fifty. I had, you know, been an apprentice for many, many years."

"Is that so, sieur?"

"Indeed it is. My master was Gerbold, and for decades it appeared that he would never die. Year followed straggling year for me, and all that time I read - I suppose few have ever read so. I began, as most young people do, by reading the books I enjoyed. But I found that narrowed my pleasure, in time, until I spent most of my hours searching for such books. Then I devised a plan of study for myself, tracing obscure sciences, one after another, from the dawn of knowledge to the present. Eventually I exhausted even that, and beginning at the great ebony case that stands in the center of the room we of the library have maintained for three hundred years against the return of the Autarch Sulpicius (and into which, in consequence, no one ever comes) I read outward for a period of fifteen years, often finishing two books in one day." Behind us, Cyby murmured, "Marvelous, sieur." I suspected that he had heard the story many times.

"Then the unlooked-for seized me by the coat. Master Gerbold died. Thirty years before I had been ideally suited by reason of predilection, education, experience, youth, family connections, and ambition to succeed him. At the time I actually did so, no one could have been less fit. I had waited so long that waiting was all I understood, and I possessed a mind suffocated beneath the weight of inutile facts. But I forced myself to take charge, and spent more hours than I could expect you to believe now in attempting to recall the plans and maxims I had laid down so many years ago for my eventual succession. He paused, and I knew he was delving again in a mind larger and darker than even his great library. "But my old habit of reading dogged me still. I lost to books days and even weeks, during which I should have been considering the operations of the estab-lishment that looked to me for leadership. Then, as suddenly as the striking of a clock, a new passion came to me, displacing the old. You will already have guessed what it was."

I told him I had not.

"I was reading - or so I thought - on the seat of that bow window on the forty-ninth floor that overlooks - I have forgotten, Cyby. What is it that it overlooks?"

"The upholsterers' garden, sieur."

"Yes, I recall it now - that little square of green and brown. I believe they dry rosemary there to put in pillows. I was sitting there, as I said, and had been for several watches, when it came to me that I was reading no longer. For some time I was hard put to say what I had been doing. When I tried, I could only think of certain odors and textures and colors that seemed to have no connection with anything discussed in the volume I held. At last I realized that instead of reading it, I had been observing it as a physical object. The red I recalled came from the ribbon sewn to the headband so that I might mark my place. The texture that tickled my fingers still was that of the paper on which the book was printed. The smell in my nostrils was old leather, still bearing the traces of birch oil. It was only then, when I saw the books themselves, that I began to understand their care."

His grip on my shoulder tightened. "We have books here bound in the hides of echidnes, krakens, and beasts so long extinct that those whose studies they are, are for the most part of the opinion that no trace of them survives unfossilized. We have books bound wholly in metals of unknown alloy, and books whose bindings are covered with thickset gems. We have books cased in perfumed woods shipped across the inconceivable gulf between creations - books doubly precious because no one on Urth can read them.

"We have books whose papers are matted of plants from which spring curious alkaloids, so that the reader, in turning their pages, is taken unaware by bizarre fantasies and chimeric dreams. Books whose pages are not paper at all, but delicate wafers of white jade, ivory, and shell; books too whose leaves are the desiccated leaves of unknown plants. Books we have also that are not books at all to the eye: scrolls and tablets and recordings on a hundred different substances. There is a cube of crystal here - though I can no longer tell you where - no larger than the ball of your thumb that contains more books than the library itself does. Though a harlot might dangle it from one ear for an ornament, there are not volumes enough in the world to counterweight the other. All these I came to know, and I made safeguarding them my life's devotion.

"For seven years I busied myself with that; and then, just when the pressing and superficial problems of preservation were disposed of, and we were on the point of beginning the first general survey of the library since its foundation, my eyes began to gutter in their sockets. He who had given all books into my keeping made me blind so that I should know in whose keeping the keepers stand."

"If you can't read the letter I brought, sieur," I said, "I will be glad to read it to you."

"You are right," Master Ultan muttered. "I had forgotten it, Cyby will read it he reads well. Here, Cyby." I held the candelabrum for him, and Cyby unfolded the crackling parchment, held it up like a proclamation, and began to read, the three of us standing in a little circle of candlelight while all the books crowded around.

" 'From Master Gurloes of the Order of the Seekers for Truth and Penitence-' "

"What," said Master Ultan. "Are you a torturer, young man?" I told him I was, and there occurred a silence so long that Cyby began to read the letter a second time: " 'From Master Gurloes of the Order of the Seekers-' "

"Wait," Ultan said. Cyby paused again; I stood as I had, holding the light and feeling the blood mounting to my cheeks. At last Master Ultan spoke again, and his voice was as matter-of-fact as it had been in telling me Cyby read well. "I can hardly recall my own admission to our guild. You are familiar, I suppose, with the method by which we recruit our numbers?"

I admitted I was not.

"In every library, by ancient precept, is a room reserved for children. In it are kept bright picture books such as children delight in, and a few simple tales of wonder and adventure. Many children come to these rooms, and so long as they remain within their confines, no interest is taken in them." He hesitated, and though I could discern no expression on his face, I received the impression that he feared what he was about to say might cause Cyby pain.