A man named Harrow once received a letter that would define the rest of his life. It was short, and it told him that the illness afflicting someone he cared for was not of the body, and that no medicine he trusted would work. He read that line twice. He walked up to the ridge with a head full of sensible arguments, the kind we all use to calm ourselves.
But the sensible thoughts grew quieter the closer he got to the place, as they always do. He was going to Saint Adelmar’s, a convent with a chapel and a slab in the floor, and a rule about the dark. A century of sisters had kept a vigil there. The singing was a low, continuous line of women’s voices, moving like water, never quite pausing.
When one voice fell away to breathe, another rose up to fill the gap. There was never a silence. The sisters were sick, but not in any way Harrow understood. By every measure he owned, they were healthy women.
Yet they were dying on their feet, because none of them had truly slept in longer than they could say. They were exhausted in a way that sleep could not cure, because their sleep was never deep enough and never at night. Mother Severine explained the truth to him. There had been a house of worship on that ridge long before Saint Adelmar’s was built, and the old one was still down there, under the floor.
She told him about the singing and the lamps, and she told him what the rule was for. The thing under the slab did not come for the waking. It came for the sleeping. There were other details in the old records.
A hand had written that the cell was empty, the door bolted from the inside, the room sealed and never used again. There were other lines like it, each one the same, written in careful brown ink. And after each one, the ledger noted that the singing grew more careful, the rule more strict. The voices do not stop.
The lamps do not go out. Harrow stopped sleeping with the lamp out long before he believed the whole story. After that, he stopped sleeping much at all. Then came the cold week, when the relay of voices that had run unbroken for a hundred years, the chain with never a missing link, was suddenly down to eight able sisters, then six, and they could not keep it up.
A human voice gives out. The night the watch failed, the lamps did not gutter and go out one by one. They went out all at once, full of oil, as if a hand had closed over each flame in turn. The eastern end of the chapel, the end with the slab, fell into a dark so complete that Harrow could not see his own hands.
He never saw it. He only knew it the way you know someone has come into a dark room behind you. It was between him and the slab, and it was reaching for the one thing in that chapel that was not awake. He heard it go slow and deep and untroubled, the breathing of someone gone all the way down into sleep.
What Harrow did then, he did without thinking. It was the only way any of us ever does the bravest thing we will do. And then it was just a cold stone room, a cracked bell still ringing itself out, and two exhausted people clinging to each other on a bench, both awake, both alive. Harrow went back to the only life he had ever known, the long sleepless guard over the cold place in the floor.
He had a story that would have made his name, and he never wrote a word of it for anyone but himself. He married late, a widow from the next valley, a patient woman. She is the reason we know the rest. She wrote that in all the years she knew him, her husband never once slept a full night through.
If the lamp guttered in the night, he would be up and across the room to it before she had even woken. He would sit up in the dark house with a lamp burning, and at the hour he never named, the hour when frost would form on the inside of the window though the room was warm, he would begin to sing. Very low, almost too low to hear. The people in the valley below, the ones who still know the old saying, will tell you that on a still night you can hear it carried down on a wind that has nothing to do with the wind.
Never stopping. Harrow stayed awake and kept the song because something a hundred years ago had opened a door in the floor of that chapel and learned the way up. The only things it cannot bear are the light and the singing and a room with no corner left for it to hide in.
And tonight, just this once, however you usually sleep, maybe leave a light on.