That unsettled me more than the noise.
Helen kept everything on that keyring. If there was no key for the attic there, it meant she had kept it somewhere else. Hidden.
I went down to the garage, fetched a screwdriver, and returned upstairs. I told myself I was checking for animals, protecting the house. Deep down, though, I knew it was more than that.
The lock gave way after some effort. When I pushed the door open, a rush of stale air hit my face. It smelled of dust, old paper, and something faintly metallic.
I switched on my flashlight and stepped inside.