July became a month of timestamps. Sandra entered on eleven separate occasions that the cameras recorded clearly, and there were four visits involving guests beyond her children. Several were during ordinary daylight hours. Three occurred in the evening after I had gone upstairs, when the backyard had grown dark except for the pool lights and the motion-activated illumination around the patio. I watched those clips the following morning, sometimes with coffee growing cold beside my laptop while I tried to understand the casual certainty with which somebody could use a place after being told directly not to.
The night visits were the worst. On one recording, Sandra appeared just after nine, guided the children through the opening, and looked toward my upstairs windows before switching on the pool lights. On another, she came with Melanie and a friend, and the adults sat talking while the children swam. Their voices were too faint for the cameras to capture accurately, and I did not try to reconstruct the conversation. The activity itself was plain enough. On the third, she arrived without the children, spent several minutes sitting alone beside the water, and then left. I found that last visit unexpectedly sad, though it did not excuse it.
I began wondering what the pool represented to her beyond the obvious pleasure of swimming. Sandra had a backyard of her own, smaller than mine but large enough for a patio and a garden. She had children who loved the water, limited time, and perhaps a private sense that life had not provided the conveniences she believed it should. A free pool next door could become, in that frame of mind, the equivalent of a right that had been unfairly withheld. I could understand how somebody might want that access. I could not understand how wanting it became permission to enter through a damaged fence.
The camera footage removed the ambiguity I had felt earlier. I no longer had to wonder whether a gate had been left open or whether the chemical readings reflected an unusually hot day. I could see the entries. I could identify the dates, the people, and the direction they had come from. I could calculate the duration of each visit and compare it with my work calendar. Each folder contained the original clip, the camera identifier, and a short note written that day. The record was no substitute for a boundary, but it was a way to prevent the boundary from disappearing into competing memories.
Once, at work, I mentioned the situation to my colleague Martin, who had been listening patiently to my complaints about household maintenance for years. He asked why I did not simply confront Sandra every time the camera alerted me. I told him there were days when I was across the city, in meetings, or traveling, and that I did not want my professional obligations to become dependent on a neighbor deciding whether to respect a fence. He considered that for a moment, then asked if I was angry.