I arrived at Blackwood Manor on a damp Tuesday in October 1889. The estate had been empty since the death of the previous owner, Lord Ashworth, three years prior. The estate agents called it a "restoration opportunity." I called it the only thing I could afford.

My name is Arthur Pendelton. I am sixty-eight years old. I spent forty-two years repairing pottery in the service of various collectors and museums—gluing broken things back together, pretending the cracks didn't matter. When my hands began to shake, the work became impossible. A retired potter is a man without a world, and I had none to return to.

Blackwood Manor sat at the edge of the Yorkshire moors, its gothic windows staring out like blind eyes. The servants' quarters on the third floor were small but dry. That was enough.

The other residents of the manor's east wing arrived one by one, as if they had always been there and only I was late. There was Mrs. Harriet Thornfield, who spoke of her garden every afternoon at precisely four o'clock. "The tomatoes were the best anyone had ever tasted," she would say, and though no one asked her to repeat it, she said it anyway. She had never grown tomatoes—I verified this months later in the parish records, which showed that Blackwood had no garden large enough for vegetables.

Then there were the twins, Miss Clara and Miss Elizabeth Blackwood—named, coincidentally or not, after the estate's original owners. They sat on the chaise lounge in the drawing room, one in the mornings, the other in the afternoons. When I asked about this arrangement, the housekeeper told me they had always taken turns. "Since the beginning," she said, which was unhelpful, because no one alive could confirm what the beginning was.

The butler, Mr. Whitfield, was impeccable in a way that felt artificial. His smile did not waver. His face, upon close inspection, seemed slightly too smooth—the kind of smoothness you see in photographs taken of the living after they have been prepared for viewing.

Mr. Whitfield was not the only one. Mrs. Thornfield's fingers never showed the redness that a year of scalding laundry would produce. The twins' skin had no pores when the light caught it at certain angles. Even the sparrow that perched on the windowsill each morning, pecking at crumbs I deliberately dropped, seemed to move with a precision that was almost mechanical.

II

The doubt did not arrive as a thunderclap. It arrived the way Yorkshire fog arrives—imperceptibly, until one day you realize the world has changed and you do not know when.

It was a Thursday. I was eating porridge—oatmeal, no sugar, a slice of bread—when the sparrow landed on the windowsill, tilted its head, and for one fraction of a second its eyes seemed to fix on me with a recognition that was far too intelligent for any bird.

What if none of them are real?

The thought came without drama. I set down my spoon. I watched the sparrow bathe in a puddle on the flagstones. I watched it shake water from its wings. I watched it with a terrible clarity that I would carry for the rest of my days.

What if Mrs. Thornfield's tomatoes were never grown? What if the twins were not two sisters but one person, shifted by means I did not understand? What if Mr. Whitfield was not a man at all but an automaton, a clockwork thing that smiled because it had been wound to smile?

I thought about my son, who lived in Edinburgh and wrote letters I never received. Had he ever been real? Or had he been part of whatever arrangement this was—a son designed to give me something to miss?

I could not prove anything. I could not prove that the sparrow was not a sparrow, that Mrs. Thornfield was not a woman, that the world outside the manor's walls did not exist in the way I had always assumed it did. I could only sit on the edge of my narrow bed and watch the fog roll across the moors and wonder whether the fog was real, whether anything was.

III

The next morning, I ate my porridge. The sparrow was there. It bathed in the puddle. It shook water from its wings.

I had made my decision. Whether they were real or not, they were here. Mrs. Thornfield's tomatoes may never have grown in any soil, but when she told the story—when her eyes crinkled at the corners and her hands fluttered in the particular way they did—something passed between us that I could not deny. The twins' arrangement may have been an illusion, but the comfort it brought to whoever sat on the chaise lounge each day was a comfort nonetheless.

Mr. Whitfield might have been a clockwork thing, but when he opened the door for me each morning, the gesture was a courtesy, and courtesy is one of the few things that survives the boundary between the real and the not.

I walked across the flagstones to the courtyard. The fog had lifted. The Yorkshire sun struck the stone walls and turned them gold. Somewhere a bell rang. The sparrow took flight and circled once above the manor before disappearing into the moors.

I went inside and washed my bowl. I drank my tea. I waited for the afternoon to begin, when Mrs. Thornfield would tell her story about tomatoes that were never grown, and I would smile, and something close to warmth would pass between us.

Perhaps this was all a test. Perhaps someone, somewhere, was watching to see how I would react when faced with the possibility that nothing was real. If so, they would find that I chose the only answer available to me.

I accepted it. I ate my toast. I let myself be kind to whatever stood before me, real or otherwise. And in a world that might be nothing more than an elaborate fiction, the act of kindness was the only thing I could call my own.