But in that mood I didn’t like the look of it. I shut the book a little impatiently and sat down to write about merchants’ guilds until late afternoon. On my way out of the library, I stopped at the front desk and handed the volume to one of the librarians, who promised to put it in the lost-and-found cabinet.

The next morning at eight o’clock, when I hauled myself up to my carrel to work on my chapter some more, the book was on my desk again, open to its single, cruel illustration. I felt some annoyance-probably the librarian had misunderstood me. I put the thing quickly away on my shelves and came and went all day without letting myself look at it again. In the late afternoon I had a meeting with my adviser, and as I swept up my papers, I pulled out the strange book and added it to the pile. This was an impulse; I didn’t intend to keep it, but Professor Rossi enjoyed historical mysteries, and I thought it might entertain him. He might be able to identify it, too, with his vast knowledge of European history.

I had the habit of meeting Rossi as he finished his afternoon lecture, and I liked to sneak into the hall before it ended, to watch him in action. This semester he was giving a course on the ancient Mediterranean, and I had caught the end of several lectures, each brilliant and dramatic, each imbued with his great gift for oratory. Now I crept to a seat at the back in time to hear him concluding a discussion of Sir Arthur Evans’s restoration of the Minoan palace in Crete. The hall was dim, a vast Gothic auditorium that held five hundred undergraduates. The hush, too, would have suited a cathedral. Not a soul stirred; all eyes were fixed on the trim figure at the front.

Rossi was alone on a lit stage. Sometimes he wandered back and forth, exploring ideas aloud as if ruminating to himself in the privacy of his study. Sometimes he stopped suddenly, fixing his students with an intense stare, an eloquent gesture, an astonishing declaration. He ignored the podium, scorned microphones, and never used notes, although occasionally he showed slides, rapping the huge screen with a pole to make his point. Sometimes he got so excited that he raised both arms and ran partway across the stage. There was a legend that he’d once fallen off the front in his rapture over the flowering of Greek democracy and had scrambled up again without missing a beat of his lecture. I’d never dared to ask him if this was true.

Today he was in a pensive mood, pacing up and down with his hands behind his back. “Sir Arthur Evans, please remember, restored the palace of King Minos at Knossos partly according to what he found there and partly according to his own imagination, his vision of what Minoan civilization had been.” He gazed into the vault above us. “The records were sparse and he was dealing mainly with mysteries. Instead of adhering to limited accuracy, he used his imagination to create a palace style breathtakingly whole-and flawed. Was he wrong to do this?”

Here he paused, looking almost wistfully out over the sea of tousled heads, cowlicks, buzz cuts, the purposely shabby blazers and earnest young male faces (remember, this was an era when only boys attended such a university as undergraduates, although you, dear daughter, will probably be able to enroll wherever you want to). Five hundred pairs of eyes gazed back at him. “I shall leave you to ponder that question.” Rossi smiled, turned abruptly, and left the limelight.

There was an intake of breath; the students began to talk and laugh, to collect their belongings. Rossi usually went to sit on the edge of the stage after the lecture, and some of his more avid disciples hurried forward to ask him questions. These he answered with seriousness and good humor until the last student had trailed away, and then I went over to greet him.

“Paul, my friend! Let’s go put our feet up and speak Dutch.” He clapped me affectionately on the shoulder and we walked out together.

Rossi’s office always amused me because it defied the convention of the mad professorial study: books sat neatly on the shelves, a very modern little coffee burner by the window fed his habit, plants that never lacked water adorned his desk, and he himself was always trimly dressed in tweed trousers and an immaculate shirt and tie. His face was of a crisp English mold, sharp-featured and intensely blue-eyed; he’d told me once that from his father, a Tuscan immigrant to Sussex, he’d acquired only a love of good food. To look into Rossi’s face was to see a world as definite and orderly as the changing of the guards at Buckingham Palace.

His mind was another thing altogether. Even after forty years of strict self-apprenticeship, it boiled over with remnants of the past, simmered with the unsolved. His encyclopedic production had long since won him accolades in a publishing world much wider than the academic press. As soon as he finished one work, he turned to another, often an abrupt change of direction. As a result, students from a myriad of disciplines sought him out, and I was considered lucky to have acquired his advisership. He was also the kindest, warmest friend I’d ever had.

“Well,” he said, turning on his coffeepot and waving me to a chair. “How’s the opus coming along?”

I filled him in on several weeks’ work, and we had a short argument about trade between Utrecht and Amsterdam in the early seventeenth century. He served up his fine coffee in porcelain cups and we both stretched back, he behind the big desk. The room was permeated with the pleasant gloom that still came in at that hour, later each evening now that spring was deepening. Then I remembered my antique offering. “I’ve brought you a curiosity, Ross. Someone’s left a rather morbid object in my carrel by mistake and after two days I didn’t mind borrowing it for you to take a look at.”

“Hand it over.” He set down the delicate cup and reached out to take my book. “Good binding. This leather might even be some kind of heavy vellum. And an embossed spine.” Something about the spine of the book brought a frown to his usually clear face.

“Open it,” I suggested. I couldn’t understand the flickering throb my heart gave as I waited for him to repeat my own experience with the nearly blank book. It opened under his practiced hands to its exact center. I couldn’t see what he saw, behind his desk, but I saw him see it. His face was suddenly grave-a still face, and not one I knew. He turned through the other leaves, front and back, as I had, but the gravity didn’t become surprise. “Yes, empty.” He laid it open on his desk. “All blank.”

“Isn’t it an odd thing?” My coffee was growing cold in my hand.

“And quite old. But not blank because it is unfinished. Just terribly blank, to make the ornament in the center stand out.”

“Yes. Yes, it’s as if the creature in the middle has eaten up everything else around it.” I’d begun flippantly, but I finished slowly.

Rossi seemed unable to drag his eyes from that central image spread before him. At last he shut the book firmly and stirred his coffee without sipping it. “Where did you get this?”

“Well, as I said, someone left it in my carrel by accident, two days ago. I guess I should have taken it to Rare Books immediately, but I honestly think it’s someone’s personal possession, so I didn’t.”

“Oh, it is,” Rossi said, looking narrowly at me. “It is someone’s personal possession.”

“So you know whose?”

“Yes. It’s yours.”

“No, I mean that I simply found it in my -” The expression on his face stopped me. He looked ten years older, by some trick of the light from the dusky window. “What do you mean, it’s mine?”

Rossi rose slowly and went to a corner of his study behind the desk, climbing two steps of the library stool to bring down a little dark volume. He stood looking at it for a minute, as if unwilling to put it in my hands. Then he passed it across. “What do you think of this?”