The Museum's Extra Set of Footsteps

The museum at night is the best job I've had and the one I can't fully explain. Fourteen galleries, a great hall with a whale skeleton, marble floors that turn every footstep into an announcement.

You get used to your own echo fast. What took me longer was noticing the other one — a second set of footsteps, always half a beat behind mine, always stopping a fraction after I stopped, so that there was a tiny extra 'tock' in the silence after I halted. In the great hall, where the acoustics are enormous, it was unmistakable: my steps, then a shadow of steps, trailing, patient, following me on my rounds.

I did the sensible things. Recorded it on my phone — the second set is faintly there, offset, though skeptics say it's slap-back echo and I can't prove them wrong from audio alone. Walked erratically, stopped suddenly, changed pace — the footsteps matched with a follower's lag, not an echo's instant return. Echoes don't take an extra step after you've stopped. This did, once, twice, a full stride into the silence, before catching itself.

Here's the part that isn't only my ears. The museum installed pressure-sensitive mats in the high-value galleries — security upgrade, motion and weight logging. The overnight logs, which I only saw because a manager showed me during an unrelated fault investigation, record a second presence on my rounds. Consistently. My weight and route, and trailing it by a few seconds, a lighter reading, following the same path, gallery to gallery, stopping where I stopped. The manager called it 'sensor bounce' and I could see he didn't believe himself.

I asked the old head of security, near retirement, on my way out one morning. He didn't laugh. He said the museum has 'always walked its own rounds' and that the trick is not to turn around — 'he doesn't like being looked for; he likes being accompanied.' I asked who. He shrugged. 'A guard, probably. Somebody who never wanted to leave the job. Can't say I'll be any different.'

I don't turn around anymore. I just say goodnight to the whale, and to whoever's half a beat behind me, and I do my rounds with company. It's better than doing them alone.