Now, six YEARS AFTER the fact, I realize things might have gone differently, but back then, on Sunday, March 8, 1998, when it all began, it was impossible to imagine any other way for events to unfold. Also perhaps I made no effort to imagine something different, believed I had no choice, no choice at all, but was instead looking at the inevitable, which I could not have influenced even if I had wanted to. It no longer matters, because what was happening, whether I chose it or not, became destiny, which nothing will ever be able to change. The apple drops from the tree, red and firm, and is nearly hidden in the dense grass, but the ants, snails, and wasps find their way to it, and in the end nothing is left of the apple; the grass will right itself in time. I must be mentioning an apple now because that Sunday, six years ago, I left the house holding an apple, not a red one, true, but yellow, which I later ate, all of it, even the seeds and the stem. To be fair, I didn't actually eat the stem, I held it between my teeth for a time, mashing and nibbling at it slowly, until it finally came apart. I always took a walk on Sundays along the Danube, no matter what the weather, in rain or the blustering koava winds. Not even the snow stopped me. It wasn't snowing that day though, nor was there much of a wind blowing: the clouds tumbled across the sky, the sun gleamed from time to time, then slipped again behind a cloud; all in all, it was an ordinary, though chilly, March day. I went out after lunch, at about two in the afternoon. I took the first bite of my apple when I crossed the square, and choosing the shortcut between the new high-rises, came out onto the quay. As I bit into it, the yellowish peel, dotted with golden freckles, resisted for a moment, then burst. Three drops of apple juice sprayed my face: one on the forehead, two on the left cheek. I moved my hand to brush them off, and between my fingers as I was touching my forehead I caught sight of a young man and woman standing at the water's edge. My eye wasn't drawn by their proximity to the river, which could be reached only by wading through the mud or hopping cautiously from stone to stone, no, it was something in their gestures that set them apart from their surroundings, as if they belonged to another world, a realm completely alien to the people strolling on the quay. Whatever it was, it stopped me in my tracks. I sat down on the nearest bench, pretending to stare off into the distance at the outlines of the buildings of Belgrade, at everything but those two people. All that was left of the apple at that point was the stem. I mashed it between my teeth, savored the bitterness, and just then, with no warning, the man slapped the woman. The slap may not have been hard; from where I was sitting it looked as if he had swung more from the elbow than the shoulder, but it might have only looked that way from where I was sitting, the angled trajectory of my gaze; the woman staggered, swayed to the right, as if she were combining the force of the blow with a lunge to evade it, then carried by inertia, sloshed back with her right foot into the river. One could clearly see how the water splashed at her ankle, how her sock soaked up the wetness, how her leg sank into the muck. The man raised his hand as if to slap her again, then dropped it, turned, and walked back to the riverbank. I too turned, but no one else seemed to have noticed anything. The man was soon on the path. He passed close by me on his way toward Hotel Yugoslavia. I watched him until he had disappeared in the crowd. Meanwhile the woman hadn't budged: her right foot was still in the water, her body twisted, her hands at her chest. I thought she might be in a state of shock and that I ought to help, and I was ready to start down the steep slope that ran from the edge of the promenade to the riverbank when I noticed a man in a black trench coat. He was standing next to a seesaw in a playground, staring straight at the woman. To this day I am not sure whether it was the same man I ran into later, but he was why I decided not to go down to the river's edge. Gnawing at the mashed apple stem, I knelt and pretended to be fiddling with my shoelaces. When I looked up again, the man in the black trench coat had gone. The woman had moved: she was wading through the mud, skirting the rocks, until she reached the steps that led to the promenade. She carefully made her way up, one step at a time, as if reluctant to get to the top. Between us was a small playground with a shabby little merry-go-round, seesaws, and a train tugged by a grinning caterpillar. I paused there for a moment, a group of fathers and mothers cheered on the children in the battered little green wagons and on peeling horses, and over their shoulders I watched the woman's progress. The train had made a full circle before her head appeared. She ascended a few more steps, turned to look behind her as if she were afraid of heights, and finally stepped onto the pavement. She glanced over at Hotel Yugoslavia, then looked the other way, toward Venezia Restaurant, and just as a child began to howl when his mother took him off a black-and-white horse, she started walking in that direction. I waited for her to get ahead, then set out after her. I wasn't thinking at all, I didn't pause to wonder what I was up to, I didn't say to myself that I should follow her, I simply put one foot in front of the other, and followed her. I don't know why. I was bothered by the way she had been slapped, though I had no right to be. I knew nothing about her, or about the man she had been standing with in the water, and countless possibilities might have led to that slap, though none, in my opinion, could justify it. She walked faster down the quay, and when she got to the restaurant she began to run. I saw her get beyond the building that used to house the Harbormaster's Office and then I too began to run, but along the other side of the building, certain that I would be shortening the distance between us. When I reached the farthest corner of the building, however, I could no longer see her. I went around to the front, peered into the gallery that had replaced the Harbormaster's Office, looked out over the boats. She was gone. I went back to the restaurant, from where she might have gone in any number of directions while I was circling the building and checking the gallery. I was furious at myself for having made that mistake, though meanwhile insisting that I shouldn't care one way or the other. It was not as if something consequential had happened: a slap, wet socks, silence, a chase. In the context of what was going on in the world, these were niggling details. Exactly, I thought to myself, and gave up. The next afternoon I was back at the corner of the Harbormaster's, ready to scour the streets down which she might have escaped, having persuaded myself that she had seen me following her and that she was not running away from the horror of the slap, but from me, and that I must find her and explain my role, which was not really a role so much as the position of an involuntary extra. I didn't run into her anywhere, of course. I glanced into two or three doorways, ventured into a yard, stopped by an open window, studied some crumbling faades: all of it pointless, I knew, but I couldn't stop myself. I had barely slept the night before. I'd lain in bed looking at the ceiling, and every time I closed my eyes, I saw the man's hand slapping the woman's face. I fell asleep just before dawn, and when I awoke, I was more tired than I was when I'd gone to bed. I drank my coffee and had a piece of bread spread with apricot jam. My hands felt heavy, my thighs wobbled, there was a buzz in my head, and it was clear that I would not be getting any writing done that day. I called my editor and told him not to worry, that he would get the piece in time for the coming issue. Fine, said the editor, and hung up. I lasted in my apartment until lunchtime, then went out to the quay. From the place where I'd been standing the evening before, there was nothing to see along the riverbank, at least not where the woman and man had been. I went over to the steps the woman had climbed, but found nothing there either. Several chunks of dried mud might possibly have come off her shoes, as well as a crumpled leaf resting on the highest step, however, the mud and the leaf could tell me nothing that I didn't already know. I went across the quay, all the way down to the Venezia, and then circled back to the Harbormaster's. If she had seen me, or if she had somehow figured out that I was following her, where might that have happened? I never came too close, and anyway there were lots of people walking along the quay and many going in the same direction as the two of us. Why would she think that I, of all people, was following her? Then I remembered the man in the black trench coat. Maybe he was the one who had drawn her attention to me? Nonsense, I thought, but the more I tried to forget the man, the more I thought of him. And later, as I walked the streets where she might have slipped by me, the man in the black trench coat was, so to speak, there with me. I went down Gospodska, Zmaj Jovina, and Karamatina streets, and the streets that crossed them. The only one left for me to explore was the street that ran parallel to the promenade, toward the Golden Oar caf. Just then, as I was turning, I noticed a button on the sidewalk at the corner of Zmaj Jovina Street. Black, shiny, a winter coat kind of button, with wisps of thread still in the buttonholes, it lay by a crack that spread across the asphalt like a root. Both the woman and the man had been wearing dark navy blue or black jackets, of that I was sure, but I was also sure that the jackets had had zippers, and not buttons. Besides, the button on the sidewalk was too big for a jacket, so it couldn't have been hers. I started off for the Golden Oar. After a couple of steps, I stopped and spun around. The button was still there, in the exact same spot. I picked it up, then noticed a little sign under it, probably written with a felt-tip pen: a triangle inscribed in a circle, and inside it, another triangle pointing the other way. I put the button down and stood up. I was baffled, I admit. Maybe it was a sign, maybe it even had something to do with the woman, but the tricky part was that the triangle was pointing in three different directions at the same time, to Zmaj Jovina Street, to the Harbormaster's, and to the street that ran to the Golden Oar. The caf, in fact, didn't mean the end of the woman's possible movements, even if she had gone that way, because the street ran on, by the power plant, all the way to a newly constructed apartment building. The kind of embarrassment she must have felt heals best in isolation, and if she lived there, she would have run straight across the street and into her building. It's possible of course that she might have turned right by the Golden Oar and come out on the square that is on the way to the open-air market and the Zemun city center, but that struck me as making her route unnecessarily long, since she would have reached the center of town more easily and quickly if she had gone along the streets that fanned out from the Harbormaster's. No one, however, was at the Golden Oar. The door was locked, the windows shrouded with curtains, the stoop littered with trash. For a moment I considered picking up each piece of trash to see if there was still another sign under it, but I soon gave up and started home. The day was drawing to a close, and I needed to work on the article I had promised the editor. These last few months I had been writing short essays and commentaries for the weekly paper