She had been a hospice nurse for twenty-two years, and in that time she had been present at three hundred and forty-seven deaths, and she had learned, from the three hundred and forty-seven, that death was not a single moment but was instead a process — a slow exhale that began somewhere inside the person and moved outward, through the lungs and the throat and the mouth, and that the exhale carried something with it, which she could not see but which she could feel, in the specific way that you can feel a room change when a person who was angry leaves it and a person who is calm enters. The exhale was the person’s last communication. It was the thing they had been carrying, for all the years of their life, and that they were finally putting down.

She collected the exhalations. She did not do this for any reason she could explain to another person, because the reason was not rational and was not scientific and was not the kind of reason that survives contact with the daylight world. She collected them because she understood, from the first death she witnessed — a man named Harold who was eighty-nine and who had been a jazz musician and who had died on a Tuesday in March with a sound like a saxophone note that no one was playing — that the exhale was the most honest thing the person would ever say, and that the honesty was temporary and was not preserved by anything except her attention, and that her attention was the only archive the exhale would ever have.

She kept them in jars. The jars were ordinary mason jars, the kind you could buy at any hardware store, and she kept them on a shelf in her basement, which was a shelf that her husband had built for her when she first told him what she was doing, and which he had built without asking why because he had learned, in twenty-two years of marriage, that the asking of why was not always the right response to the things she needed. The jars were labeled with the person’s name and the date and the sound the exhale made, which she transcribed in the only way she could — phonetically, approximatively, with the understanding that the approximation was the best she could do and that the best she could do was the only record there would be.

The sound of Harold’s exhale was still in the first jar, on the left end of the shelf. She had not opened the jar in eleven years, because she did not need to open it. She knew what was in it. She had been there. She had heard it. The sound was a descending tone, not sad, not relieved, not any of the things that death is supposed to be. It was curious. It was the sound of a person arriving somewhere and being interested in what they found.

She added a new jar to the shelf every three to four weeks, which was the rate at which her patients died, which was a rate she had stopped thinking about as a frequency and had started thinking about as a rhythm, which was the rhythm of her professional life and which was the rhythm she could not imagine changing, because the changing would mean the stopping, and the stopping was not something she had prepared for, because the preparation for the stopping required an imagination of a self that was not defined by the collecting, and the self that was not defined by the collecting was a self she did not know.

Her husband died on a Sunday in November. He was seventy-one and he had been healthy and he had been, by every measure, not ready to die, and the dying was sudden and was unexpected and was the kind of death that does not give the people left behind the comfort of having said goodbye, because the goodbye requires time and the time was not there. She was with him when he died. She was the only person in the room. She was the only person who had ever been there, in all of her years of being with the dying, who had been present at the death of someone she loved, and the presence was different when it was love, and the difference was not that the exhale was more important. The difference was that she could not collect it.

She understood, in the moment of his death, that she had never considered collecting the exhalations of people she loved, because the collecting required a distance that love did not permit, and because the distance was what allowed her to be a witness instead of a participant, and because the witness is not the same as the one who is inside the moment, and because the inside of the moment was where she was, when her husband died, and the inside of the moment was not a place where she could reach for a jar and a label and a pen and write down the sound that was leaving him, because the moment was not a place for documentation. The moment was a place for being there, and she was there, and the being there was the only thing she could do, and the doing was the last thing she could give him, which was her attention, undivided, on the sound he was making, which was not a sound she would keep in a jar, because the sound was not hers to keep, because it was his, and because some exhalations are not meant to be collected, only witnessed, and the witnessing is the keeping, and the keeping is the remembering, and the remembering is what she did, for the rest of her life, without jars, without labels, without the shelf in the basement, with only the sound that was still in her memory, eleven years later, which was the sound of her husband dying, which was the sound of a person arriving somewhere and being interested in what he found.