The Gymnast's Exhibition

My name is Cassy, I'm fifty-four years old, and last spring my marriage of twenty-five years ended. I'm an architect, and after the papers were signed I looked around the house we'd shared and realized every single room belonged to the past. So I sold it. I moved into a small apartment in a quiet part of town, the kind of place with creaky floors and radiators that clank, and I told myself this was a fresh start. Mostly it was just quiet.

The first thing I learned about the new place was that the walls were thin. Not a little thin. Paper thin. I could hear my neighbor's TV, her kettle, her laugh on the phone. She was a young woman, I figured from the voice, maybe late twenties, and she lived on the other side of my bedroom wall. I never saw her those first weeks. I just heard her coming and going at odd hours, which made me think she worked nights or kept odd hours. It didn't bother me much. After twenty-five years of a man snoring beside me, hearing another human breathe through a wall was almost company.

To fill my evenings, I joined a climbing gym called Peak Pulse, about ten minutes from my place. I'd never climbed in my life, but I did gymnastics in my twenties and I missed using my body that way. The flyer said beginner classes on Tuesdays, so one Tuesday in May I showed up in old leggings and a t-shirt and felt about a hundred years old the second I walked in. The gym smelled like chalk and rubber, and the walls were covered in bright holds, yellow and red and green, like candy scattered up to the ceiling.

The woman running the intro class was young, maybe twenty-eight, with dark hair pulled back in a messy bun and forearms that looked like they belonged on someone twice her size. She introduced herself as Mabel and said she co-owned the place with her business partner, Luis.

"Okay, so first rule," she said, grinning at the six of us beginners. "Nobody laughs at anybody. We've all been that person hanging off the wall like a wet sock. I was that person last decade and I still remember it."

I liked her instantly. She had that easy confidence some people are just born with, the kind that doesn't need to announce itself. She watched me on the wall and gave one correction, then another, and by the end of the hour I'd made it to the top of a route for the first time.

"There it is!" she called up. "Cassy, you sandbagged me. You said you'd never done this."

"Gymnastics, years ago," I called back. "Nothing since."

"Well, welcome back to your body." She said it casually, but it stuck with me all the way home. Nobody had told me anything about my body in a long time except that it was aging.

I kept going back, twice a week, sometimes three. I got stronger fast, which surprised me at my age, and I got to know the gym a little. Luis ran the front desk most nights, a friendly guy of about thirty-one who remembered everyone's name. Mabel floated around, coaching, fixing holds, and often she stayed long after the place emptied. I noticed her lingering near closing time, wandering the routes she liked, sometimes climbing alone with the lights half off. Once I stayed late myself, stretching on a mat, and watched her climb in that quiet way she had, deliberate and smooth, like the wall was talking to her and she was answering. She saw me watching and didn't seem to mind. She just smiled and kept going.

"Good night," she said when she locked up behind me. "See you Thursday."

"See you Thursday," I said, and walked home in the dark feeling lighter than I had in a year.

Then came the night that changed everything, though I didn't know it yet.

It was a Friday in June, past midnight. I couldn't sleep, which happened a lot those first months. I was lying in bed reading when I heard it through the wall. A rhythmic squeaking, soft and regular, like a bedspring or a chair hinge. Then a sound I hadn't heard before. A low, muffled moan, quickly smothered, like someone pressing a pillow over their own mouth.

I froze. I'm not a snoop, and my first instinct was to put in earplugs and mind my business. But I'd heard that voice before. Through a wall this thin, voices carry, and I was almost certain it was my neighbor. And then she laughed once, low, and I knew. I'd heard that laugh on the phone, heard it through the wall a dozen evenings. It was Mabel. My climbing coach lived on the other side of my bedroom wall, and she was doing exactly what it sounded like she was doing.

Well. I lay there staring at the ceiling feeling like I'd been caught at something, which made no sense, since I was the one in my own bed. She was the one who didn't know the walls were paper. I should have felt embarrassed for her. Instead I felt something warmer and more complicated. Curious. Seen, almost, without being seen. She didn't know I existed, that night, as anything but a shape through drywall.

The sounds went on for a while, unhurried. Then quiet. Then I heard her water running in her little kitchen, and after that, silence.

I didn't sleep well. Not from shock, exactly. From thinking.

The next night, Saturday, I was home alone again, and around the same hour I found myself doing something strange. I'd bought a length of climbing rope at the gym shop the day after that Friday, just a souvenir thing, and I'd hung it from a hook in my bedroom doorway to practice knots. Before I did anything else, I did the decent thing and knocked twice on the wall, gently, to say I was there and the walls were paper. A pause. Then two soft knocks came back, and a muffled laugh. That became our whole vocabulary, without a word said: two knocks for yes, one for stop, and either of us could end any night with a single rap. Then I climbed up on the door frame a little, hands on the rope, feet on the frame, the way she'd shown us in class. The rope creaked under my weight, a slow rhythmic squeak against the hook.

And through the wall, everything went quiet.

I stopped too, heart pounding, feeling absurd. A fifty-four-year-old architect hanging off a doorframe at midnight, eavesdropping by accident. Then