Record e1eb8a8b4e63442ca151f4f754581a58

We need to track beliefs about where each person thinks objects are based on actions observed? The scenario gives events; we must infer what each character believes given observations. Likely assumption: characters know locations when they move items themselves or see them being moved? Need to interpret typical "belief tracking" puzzle: When someone moves an object, they know its new location. Others may not know unless they observe the action. If they didn't see movement, they retain previous belief.

Given timeline:

- At 8:00, Adrian took the worn folder and placed it in the workshop.
   - Who sees this? At same time 8:00, Willa happened to be watching. So at 8:00, Willa watches Adrian take the worn folder and place it in the workshop. Thus Willa knows that after 8:00, the worn folder is in the workshop.

- At 8:01, Willa brought the worn folder over to the north stairwell.
   - She moves it herself, so she now knows it's in north stairwell.

Thus after 8:01, Willa believes worn folder is in north stairwell.

Later events do not involve her moving or seeing the folder again. No one else moves the folder later. So her belief remains north stairwell.

Thus answer: north stairwell.

Check if any other observation could change belief: At 8:02, Priya moved heavy basket into north stairwell— irrelevant. At 8:03, Willa moved heavy basket to rooftop terrace— still doesn't affect folder. At 8:04 etc. No further mention of folder.

Thus Willa believes worn folder is in north stairwell.

Answer format: just location name.