🗒️ Shaft 13C – Incident Shift Log

Observer: N. McTavish

Classification: Unofficial Personal Notes (UNLOGGED)

📅 Log 1 – 2025-04-11

Time: 03:17 AM
Zone: Service Tunnel A13-C

Heard three deliberate knocks coming from behind the west bulkhead. No crew logged in past midnight.
Vibration did not register on seismic monitor. Chalked a mark above the panel.

📅 Log 2 – 2025-04-13

Time: 02:44 AM
Zone: Shaft Ladder Access (Old Union Route)

Three knocks again. Faint, slower this time. Counted 11 seconds between each.
Nobody else on the roster. Reviewed camera feed — showed static during 02:40–02:45.
Logged discrepancy in personal record. Marked pipe with “N-2” symbol.

📅 Log 3 – 2025-04-15

Time: 04:09 AM
Zone: Sublevel Maintenance Hatch

Woke up from nap on shift to hear three metal taps, directly under my boots.
Checked below — empty corridor. Felt a pull behind my ear.
Wrote down what I remembered hearing in the chant: “Three to knock. None to wake.”

📅 Log 4 – 2025-04-16

Time: 01:01 AM
Zone: South Echo Chamber

Audio test ping returned corrupted. Reversed wave shows three pulses evenly spaced.
Labeled anomaly as “Echo-K3.” Recommended to IT — no follow-up.
Left personal chalk symbol: triangle inside circle.

Summary Observation (Handwritten):

“It’s always three. Always when I’m alone.
I think the mine is speaking — or echoing someone who never left.”