The funeral was scheduled for the following Saturday. Under the circumstances, the family wanted to proceed quietly, with a brief service confined to close family and friends. That I was to be among them was ordained by his note, although I told Arianna that I didn’t know what to make of it, which was true. We’d been friends, but not great friends. Our bond had hardly gone deep enough to earn my inclusion in his final thoughts. I wondered if he intended this note as a punishment of some kind, though I could not think what sin I had committed to warrant it. The other possibility was that he was sending me a message of an altogether different nature—that his death was, in a way only he could understand, a demonstration for my benefit. But what it could mean, I hadn’t the foggiest.

Jonas was spending the summer on an archaeological dig in Tanzania; Stephanie had won a coveted internship in Washington, working on Capitol Hill, but at the time of Lucessi’s death was traveling with her parents in France and could not be reached. I did not think that Lucessi’s death had shaken me all that badly, but of course it had—my emotions, like Arianna’s, were blunted by shock—yet I showed the good sense to call the one person I trusted whom I could actually get on the phone. Liz’s family was on the Cape, but she was working at a bookshop in Connecticut. I’m sorry about your friend, she said. You shouldn’t be alone. Meet me at Grand Central at the main kiosk, the one with the four-faced clock.

My train got into Penn Station early Friday morning. I took the 1 train uptown to Forty-second Street, changed to the 7, and arrived at Grand Central at the height of the rush. Except to change buses at Port Authority in the middle of the night, I had never been to New York City, and as I ascended the ramp into the terminal’s main concourse, I was, like many a traveler through the ages, bowled over by the majesty of its dimensions. I felt as though I’d entered the grandest of cathedrals, not some mere way station but a destination in its own right, worthy of pilgrimage. Even the tiniest sound seemed magnified by the sheer size of the place. The smoke-stained ceiling, with its images of constellated stars, soared so majestically overhead it seemed to rewrite the dimensions of the world. Liz was waiting for me at the kiosk, wearing a light summer dress and carrying an overnight bag. She hugged me far longer and more tightly than I was prepared for, and it was in the shelter of her embrace that I suddenly felt the weight of Lucessi’s death, like a cold stone at the center of my chest.

“We’re staying at my parents’ apartment in Chelsea,” she said. “I won’t take no for an answer.”

We took a cab downtown, through streets clogged with traffic and great walls of pedestrians that surged forward at every intersection. This was early 1990s New York, a time when the city seemed on the verge of unmanageable chaos, and although I was, later in life, to live in a very different Manhattan—safe, tidy, and affluent—my first impression of the city was so indelible, so charged with heat and light, that it remains my truest vision of the place. The apartment was on the second floor of a brownstone just off Eighth Avenue—two small rooms, compactly furnished, with a view across Twenty-eighth Street of a small theater known for incomprehensible avant-garde productions and a men’s haberdashery called World of Shirts and Socks. Liz had explained that her parents only used the place when they came into the city to shop or take in a show. Probably nobody had been there in months.

The funeral was at ten the next morning. I called Arianna to tell her where I was staying, and she said that she’d arrange for a car to meet us in the morning and drive us to Riverdale. There was no food in the apartment, so Liz and I went up the street to a small café with tables on the sidewalk. She told me what she knew of Jonas, which wasn’t very much. She’d received only three letters, none very long. I’d never quite understood what he was doing there—he was a biologist, or wanted to be, not an archaeologist—though I knew it had to do with extracting fossilized pathogens from the bones of early hominids.

“Basically,” she said, “he’s squatting in the dirt all day long, dusting rocks with a paintbrush.”

“Sounds like fun.”

“Oh, to him it is.”

I knew this to be so. Sharing a room with the man had taught me that, despite his fun-loving exterior, Jonas was deeply serious about his studies, sometimes verging toward obsession. The core of his passion lay in the idea that the human animal was a truly unique organism, evolutionarily distinct. Our powers of reason, of language, of abstract thought—none of these was matched anywhere else in the animal kingdom. Yet despite these gifts, we remained chained to the same physical limitations as every other creature on the earth. We were born, we aged, we died, all of it in a relatively short span of time. From an evolutionary point of view, he said, this simply made no sense. Nature craved balance, yet our brains were completely out of sync with the short shelf life of the bodies that housed them.