The antique mirror arrived on a Thursday. Sarah had bought it at an estate sale for thirty pounds because it had an interesting frame—carved oak with patterns that looked like vines if you squinted and like fingers if you did not. The glass itself was old and slightly warped, giving everything reflected in it a subtle distortion that made familiar faces look almost unfamiliar, like people you almost recognized from somewhere you could not quite place.

She hung it in the hallway, directly across from the front door, because that was where it fit and because she liked the way it made the narrow space feel larger. For the first week it was just a mirror. It reflected coats and umbrellas and the occasional guest arriving for dinner. Nothing unusual occurred.

On the eighth day she noticed something wrong.

The Reflection

She was leaving for work when she caught her reflection and saw that it was moving at the wrong speed. She had already turned away, her hand on the doorknob, but the reflection was still looking at her, still standing in the hallway, still watching her go with an expression she could not quite identify.

She froze. The reflection froze too, but a second later than she did, like an echo arriving after the original sound had already faded into silence.

She told herself it was a trick of the light. Old glass distorts. It creates optical illusions. It makes things appear to move independently when they are simply reflecting light at slightly different angles than expected.

She tested it the next morning. She stood in front of the glass and raised her right hand. The reflection raised its left hand, as mirrors do. She tilted her head. The reflection tilted its head. She blinked. The reflection blinked.

Then she turned to leave. And the reflection stayed still for exactly one second before turning to leave too.

The Delay

The delay grew longer each day. By the second week it was three seconds. By the third week it was ten. By the end of the month, Sarah would walk past the glass in the morning and her reflection would still be standing there, watching her go with an expression she could not read but which felt increasingly like concern.

She stopped using the hallway. She entered and left through the kitchen, which had no mirrors, and she told herself this was practical behavior. There was nothing practical about avoiding a piece of glass in your own home, but she did it anyway, because the alternative was worse.

One evening she heard a sound from the hallway. A soft, rhythmic tapping, like fingernails against glass. She stood in the kitchen doorway and listened. The tapping continued for exactly eleven seconds and then stopped. In the silence that followed, she heard something else—a voice, faint and distant, speaking words she could not quite make out but which sounded urgent.

She covered the glass with a sheet the next morning. The fabric was thin cotton, barely enough to block the outline of the pane beneath it, but it was enough to stop her from seeing the reflection. Not seeing was easier than seeing and pretending not to care.

On the night of the new moon, she removed the sheet. She stood in front of the glass and looked at herself and waited. The reflection looked back. And then, slowly, deliberately, the reflection raised its hand and pressed its palm against the glass from the other side.

Sarah did the same. Their hands met, separated by a quarter-inch of antique glass, and in that moment she understood what the reflection had been trying to tell her all along. It was not trapped on the other side of the glass. She was.

She sold the house three months later. The new owners removed the glass during renovations. They found nothing behind it except plaster and lath and a single hair, long and dark, pressed into the wall as though someone had been standing very close for a very long time.