| Item | Qty | Status | Notes |
| Digital audio recorder | 2 | PRESENT | Used in EXP-002, EXP-003 |
| Survey measuring wheel | 1 | PRESENT | EXP-001 baseline measurements |
| Mirror panel (2m × 1m) | 2 | MISSING | Used EXP-003, not returned after suspension |
| Stopwatches (precision) | 6 | PRESENT | EXP-003 time tracking |
| Server hardware (local) | 1 | MISSING | Removed by subject — 2021 |
| Notebooks (A4, grid) | 14 | 12 PRESENT | 2 taken by subject at departure |
| Laptop (personal, black) | 1 | MISSING | Last seen: subject's apartment, case J-2021-09 |
| Printed corridor maps (EXP-001) | 24 | PRESENT | |
| Word stimulus cards (EXP-002) | 18 | MISSING | Taken by subject. Reason: unknown. |
Personal Effects — Found in Lab Following Departure
One photograph, 10×15cm, printed
Subject depicted: unknown. Location depicted: a corridor. Unmarked on reverse except for a small pencil mark: ∞. Transferred to archive.
One letter, A4, unsealed, unaddressed
Contents: personal. Transferred to archive per institutional protocol. Not reviewed by lab staff.
One key, brass, small (approx. 3cm)
Purpose unknown. No corresponding lock found in lab or subject's apartment. Keysmith consulted — "older than it looks." Not matching any institutional key pattern. Still in lab possession. the key opens the basement. but the basement was never locked.
One index card with handwritten note:
"I went willingly. The key is for whoever comes after me. You'll know what it opens when you find the right door. — J."