The Knocking Hollow

The winter of 1997 was brutally cold in the small town of Ashford. Our primary school, St. Cuthbert’s, was tucked between a frozen canal and a cemetery that seemed to lean toward the church hall where we practiced. Every year, our head teacher, Mr. Albright, wrote a new Christmas play, but this year he had outdone himself with a ‘nativity with a twist’ that had us sheep (year six) crawling around on all fours, baaing at inopportune moments. Rehearsals were chaos, but on the night of the performance, the church was packed with parents and grandparents, their breath misting in the unheated nave.

After our scene, we were herded behind the altar to wait for the finale. My friends Callum and Rosie and I crouched behind the stone slab that held the Bible, giggling at the thought of the audience seeing our woolly heads poke out from the sides. The altar was ancient, older than the school, with intricate carvings on its front—vines and leaves, but also strange, almost animal-like faces hidden among the foliage. We leaned against its cold surface, our backs to the congregation, and started whispering about how Mrs. Higgins had tripped over a shepherd’s crook during rehearsal.

That’s when we heard it. A knock. Not from the front, but from inside the altar itself—a solid, deliberate thud, as if someone had rapped their knuckles against the hollow stone from within. We froze. Callum’s eyes went wide. Rosie whispered, ‘Did you hear that?’ Before I could answer, another knock came, this time louder. Three knocks, actually, in a pattern: knock, knock, pause, knock. It sounded like it came from the very heart of the altar, right where we had our hands pressed.

We scrambled back, but curiosity got the better of us. The altar had decorative holes—small circles, like a doily carved in stone. We bent down, pressing our eyes to those holes, and what we saw made the cold seep into my bones. On the other side, in the space between the altar and the back wall, were three children. They were sitting exactly as we were—leaning against the altar, backs to us—but they were on the far side, in a tiny alcove that should have been sealed. Their winter coats were old-fashioned, like something from a Victorian photograph, with brass buttons and woolen scarves. They didn’t move. They just sat there, perfectly still, as if they were waiting.

None of them could have knocked. Their hands were tucked into their pockets. And yet, as we watched, a fourth knock echoed, and the child in the middle—a girl with a tight braid—slowly turned her head. Her face was pale, almost blue, and her eyes were white, like frozen milk. She opened her mouth, and out came a sound that wasn’t a word but a low, rattling sigh, as if she had been holding her breath for a century. Then she lifted her hand and tapped the altar from her side, the same pattern: knock, knock, pause, knock.

We screamed. We scrambled away, but our legs wouldn’t take us far. The Vicar’s voice boomed from the front, ‘Sheep! Back to your places!’ We stumbled back to the stage, our hearts hammering, but all through the rest of the play, I kept glancing at the altar. The children were gone. But in the final scene, when the whole cast gathered for a bow, I felt a cold draft from behind, and a whisper in my ear like tiny ice shards: ‘You have to come in now. It’s always cold in here.’

The next morning, I told my parents, but they dismissed it as the Christmas spirit playing tricks. I never told them the worst part. When I looked back at the altar during the performance, I saw our own reflections in the polished stone—but there were four of us, not three. And the fourth had a face I knew, but from an old photograph in the school hall: a girl who had died in the church fire of 1923, when the altar was the only thing that survived. I still dream about her. In the dream, she’s sitting in that hollow space, knocking, waiting for me to come back and keep her company. And every Christmas, when I walk past St. Cuthbert’s, I hear the pattern: knock, knock, pause, knock. But now I know it’s not a question. It’s an invitation.