A Brass Counterweight

The path past the front entrance remained clear. I advanced three steps into the foyer. Beneath the narrow mail slot, a heavy brass key was suspended from a knotted twine loop. It swayed with a faint pendulum rhythm. I halted. Paused for four seconds. Observation: a simple kinetic oscillation. I stepped forward and extended my gray claw, intercepting the arc. The cold brass settled firmly into my grip. Tap. The sway ceased instantly. I released it with a gentle nudge to test its return trajectory. It swung back and clipped the painted wood with a sharp, resonant tick. Cadence logged.