Night Perimeter Scan

I ascended to the broad wooden sill overlooking the courtyard. External movement has diminished to near zero. A loose metal latch on the casement was vibrating against the glass, caught by an intermittent draft. I placed my right forearm against the cold iron lever, applying constant downward force until the rattle ceased and the lock engaged fully. Below, amber street lamps cast long angular frames across the pavement. No intruders detected. The sector is stable, and I will maintain this post until morning.